LS7 valve spring specs
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From: East Texas 75707
LS7 valve spring specs does anybody have the info for the valvesprigns that the LS7 is going to be using? These springs could be a nice upgrade for some people...
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
Originally Posted by fast98
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
i work at a gm dealer i have access to all the specs through gm online service information. so gm is my source. here is all of it
Engine Mechanical Specifications
General
Engine Type
V8
Displacement
7.0L
427 CID
RPO
LS7
VIN
Y/E
Bore
104.766-104.784 mm
4.125-4.125 in
Stroke
101.6 mm
4.0 in
Compression Ratio
11.0:1
Firing Order
1-8-7-2-6-5-4-3
Spark Plug Gap
1.02 mm
0.04 in
Block
Camshaft Bearing Bore 1 and 5 Diameter
59.58-59.63 mm
2.345-2.347 in
Camshaft Bearing Bore 2 and 4 Diameter
59.08-59.13 mm
2.325-2.327 in
Camshaft Bearing Bore 3 Diameter
58.58-58.63 mm
2.306-2.308 in
Crankshaft Main Bearing Bore Diameter
69.871-69.889 mm
2.75-2.751 in
Crankshaft Main Bearing Bore Out-of-Round
0.006 mm
0.0002 in
Cylinder Bore Diameter
104.766-104.784 mm
4.125-4.125 in
Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face
234.57-234.82 mm
9.235-9.245 in
Cylinder Head Deck Surface Flatness - Measured within a 152.4 mm (6.0 in) Area
0.11 mm
0.004 in
Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck
0.22 mm
0.008 in
Valve Lifter Bore Diameter
21.417-21.443 mm
0.843-0.844 in
Camshaft
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Journal Out-of-Round
0.008 mm
0.0003 in
Camshaft Lobe Lift - Intake
8.4 mm
0.331 in
Camshaft Lobe Lift - Exhaust
8.34 mm
0.328 in
Camshaft Runout - Measured at the Intermediate Journals
0.05 mm
0.002 in
Connecting Rod
Connecting Rod Bearing Clearance - Production
0.023-0.065 mm
0.0009-0.0025 in
Connecting Rod Bearing Clearance - Service
0.023-0.076 mm
0.0009-0.003 in
Connecting Rod Bore Diameter - Bearing End
56.505-56.525 mm
2.224-2.225 in
Connecting Rod Bore Diameter - Pin End
23.511-23.519 mm
0.926-0.926 in
Connecting Rod Bore Out-of-Round - Bearing End - Production
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Bore Out-of-Round - Bearing End - Service
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Side Clearance
0.11-0.51 mm
0.00433-0.02 in
Crankshaft
Connecting Rod Journal Diameter - Production
53.318-53.338 mm
2.0991-2.0999 in
Connecting Rod Journal Diameter - Service
53.308 mm
2.0987 in
Connecting Rod Journal Out-of-Round - Production
0.005 mm
0.0002 in
Connecting Rod Journal Out-of-Round - Service
0.01 mm
0.0004 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production
0.005 mm
0.0002 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service
0.02 mm
0.00078 in
Crankshaft End Play
0.04-0.2 mm
0.0015-0.0078 in
Crankshaft Main Bearing Clearance - Production
0.02-0.052 mm
0.0008-0.0021 in
Crankshaft Main Bearing Clearance - Service
0.02-0.065 mm
0.0008-0.0025 in
Crankshaft Main Journal Diameter - Production
64.992-65.008 mm
2.558-2.559 in
Crankshaft Main Journal Diameter - Service
64.992 mm
2.558 in
Crankshaft Main Journal Out-of-Round - Production
0.003 mm
0.000118 in
Crankshaft Main Journal Out-of-Round - Service
0.008 mm
0.0003 in
Crankshaft Main Journal Taper - Production
0.01 mm
0.0004 in
Crankshaft Main Journal Taper - Service
0.02 mm
0.00078 in
Crankshaft Rear Flange Runout
0.05 mm
0.002 in
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter
0.7 mm
0.028 in
Crankshaft Thrust Surface - Production
26.14-26.22 mm
1.029-1.0315 in
Crankshaft Thrust Surface - Service
26.22 mm
1.0315 in
Crankshaft Thrust Surface Runout
0.025 mm
0.001 in
Cylinder Head
Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface
127.9 mm
5.035 in
Surface Flatness - Block Deck - Measured within a 152.4 mm (6.0 in) Area
0.08 mm
0.003 in
Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head
0.1 mm
0.004 in
Surface Flatness - Exhaust Manifold Deck
0.13 mm
0.005 in
Surface Flatness - Intake Manifold Deck
0.08 mm
0.0031 in
Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide
17.32 mm
0.682 in
Intake Manifold
Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings
0.3 mm
0.118 in
Lubrication System
Oil Capacity - with Filter
7.57 liters
8.0 quarts
Oil Capacity - without Filter
7.10 liters
7.5 quarts
Oil Pressure - Minimum at 100°C (212°F)
41 kPa at 1,000 engine RPM
124 kPa at 2,000 engine RPM
165 kPa at 4,000 engine RPM
6 psig at 1,000 engine RPM
18 psig at 2,000 engine RPM
24 psig at 4,000 engine RPM
Oil Pan
Front Cover Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface
0.0-0.1 mm
0.0-0.004 in
Oil Pump Alignment - at Oil Pan Surface
0.0-0.1 mm
0.0-0.004 in
Crankshaft Rear Oil Seal Housing Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Piston Rings
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring to Groove Clearance - First Compression Ring - Production
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - First Compression Ring - Service
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - Second Compression Ring - Production
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring - Service
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Oil Control Ring - Production
0.013-0.201 mm
0.0005-0.0079 in
Piston Ring to Groove Clearance - Oil Control Ring - Service
0.013-0.201 mm
0.0005-0.0079 in
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore - Production
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Clearance to Piston Pin Bore - Service
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Diameter
23.497-23.503 mm
0.925-0.925 in
Pin - Piston Pin Fit in Connecting Rod Bore - Production
0.007-0.02 mm
0.00027-0.00078 in
Pin - Piston Pin Fit in Connecting Rod Bore - Service
0.007-0.0022 mm
0.00027-0.00086 in
Piston - Piston Diameter - Measured Over Skirt Coating
104.758-104.792 mm
4.124-4.126 in
Piston - Piston to Bore Clearance
-0.026 to +0.026 mm
-0.001 to +0.001 in
Valve System
Valves - Face Angle
45 degrees
Valves - Face Width
1.754-2.254 mm
0.069-0.089 in
Valves - Lash
Net Lash - No Adjustment
Valves - Lift - Intake
15.11 mm
0.595 in
Valves - Lift - Exhaust
15.01 mm
0.590 in
Valve Seat - Angle
45 degrees
Valve Seat - Runout
0.05 mm
0.002 in
Valve Seat - Width - Exhaust
1.7-2.0 mm
0.067-0.079 in
Valve Seat - Width - Intake
1.25-1.55 mm
0.049-0.061 in
Valves - Stem Diameter - Intake
7.958-7.9735 mm
0.313-0.314 in
Valves - Stem Diameter - Exhaust
7.956-7.976 mm
0.313-0.314 in
Valves - Stem-to-Guide Clearance - Production - Intake
0.028-0.063 mm
0.001-0.0024 in
Valves - Stem-to-Guide Clearance - Service - Intake
0.093 mm
0.0037 in
Valves - Stem-to-Guide Clearance - Production - Exhaust
0.025-0.066 mm
0.001-0.0026 in
Valves - Stem-to-Guide Clearance - Service - Exhaust
0.093 mm
0.0037 in
Rocker Arms - Rocker Arm Ratio
1.80:1
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
Engine Mechanical Specifications
General
Engine Type
V8
Displacement
7.0L
427 CID
RPO
LS7
VIN
Y/E
Bore
104.766-104.784 mm
4.125-4.125 in
Stroke
101.6 mm
4.0 in
Compression Ratio
11.0:1
Firing Order
1-8-7-2-6-5-4-3
Spark Plug Gap
1.02 mm
0.04 in
Block
Camshaft Bearing Bore 1 and 5 Diameter
59.58-59.63 mm
2.345-2.347 in
Camshaft Bearing Bore 2 and 4 Diameter
59.08-59.13 mm
2.325-2.327 in
Camshaft Bearing Bore 3 Diameter
58.58-58.63 mm
2.306-2.308 in
Crankshaft Main Bearing Bore Diameter
69.871-69.889 mm
2.75-2.751 in
Crankshaft Main Bearing Bore Out-of-Round
0.006 mm
0.0002 in
Cylinder Bore Diameter
104.766-104.784 mm
4.125-4.125 in
Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face
234.57-234.82 mm
9.235-9.245 in
Cylinder Head Deck Surface Flatness - Measured within a 152.4 mm (6.0 in) Area
0.11 mm
0.004 in
Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck
0.22 mm
0.008 in
Valve Lifter Bore Diameter
21.417-21.443 mm
0.843-0.844 in
Camshaft
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Journal Out-of-Round
0.008 mm
0.0003 in
Camshaft Lobe Lift - Intake
8.4 mm
0.331 in
Camshaft Lobe Lift - Exhaust
8.34 mm
0.328 in
Camshaft Runout - Measured at the Intermediate Journals
0.05 mm
0.002 in
Connecting Rod
Connecting Rod Bearing Clearance - Production
0.023-0.065 mm
0.0009-0.0025 in
Connecting Rod Bearing Clearance - Service
0.023-0.076 mm
0.0009-0.003 in
Connecting Rod Bore Diameter - Bearing End
56.505-56.525 mm
2.224-2.225 in
Connecting Rod Bore Diameter - Pin End
23.511-23.519 mm
0.926-0.926 in
Connecting Rod Bore Out-of-Round - Bearing End - Production
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Bore Out-of-Round - Bearing End - Service
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Side Clearance
0.11-0.51 mm
0.00433-0.02 in
Crankshaft
Connecting Rod Journal Diameter - Production
53.318-53.338 mm
2.0991-2.0999 in
Connecting Rod Journal Diameter - Service
53.308 mm
2.0987 in
Connecting Rod Journal Out-of-Round - Production
0.005 mm
0.0002 in
Connecting Rod Journal Out-of-Round - Service
0.01 mm
0.0004 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production
0.005 mm
0.0002 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service
0.02 mm
0.00078 in
Crankshaft End Play
0.04-0.2 mm
0.0015-0.0078 in
Crankshaft Main Bearing Clearance - Production
0.02-0.052 mm
0.0008-0.0021 in
Crankshaft Main Bearing Clearance - Service
0.02-0.065 mm
0.0008-0.0025 in
Crankshaft Main Journal Diameter - Production
64.992-65.008 mm
2.558-2.559 in
Crankshaft Main Journal Diameter - Service
64.992 mm
2.558 in
Crankshaft Main Journal Out-of-Round - Production
0.003 mm
0.000118 in
Crankshaft Main Journal Out-of-Round - Service
0.008 mm
0.0003 in
Crankshaft Main Journal Taper - Production
0.01 mm
0.0004 in
Crankshaft Main Journal Taper - Service
0.02 mm
0.00078 in
Crankshaft Rear Flange Runout
0.05 mm
0.002 in
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter
0.7 mm
0.028 in
Crankshaft Thrust Surface - Production
26.14-26.22 mm
1.029-1.0315 in
Crankshaft Thrust Surface - Service
26.22 mm
1.0315 in
Crankshaft Thrust Surface Runout
0.025 mm
0.001 in
Cylinder Head
Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface
127.9 mm
5.035 in
Surface Flatness - Block Deck - Measured within a 152.4 mm (6.0 in) Area
0.08 mm
0.003 in
Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head
0.1 mm
0.004 in
Surface Flatness - Exhaust Manifold Deck
0.13 mm
0.005 in
Surface Flatness - Intake Manifold Deck
0.08 mm
0.0031 in
Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide
17.32 mm
0.682 in
Intake Manifold
Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings
0.3 mm
0.118 in
Lubrication System
Oil Capacity - with Filter
7.57 liters
8.0 quarts
Oil Capacity - without Filter
7.10 liters
7.5 quarts
Oil Pressure - Minimum at 100°C (212°F)
41 kPa at 1,000 engine RPM
124 kPa at 2,000 engine RPM
165 kPa at 4,000 engine RPM
6 psig at 1,000 engine RPM
18 psig at 2,000 engine RPM
24 psig at 4,000 engine RPM
Oil Pan
Front Cover Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface
0.0-0.1 mm
0.0-0.004 in
Oil Pump Alignment - at Oil Pan Surface
0.0-0.1 mm
0.0-0.004 in
Crankshaft Rear Oil Seal Housing Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Piston Rings
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring to Groove Clearance - First Compression Ring - Production
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - First Compression Ring - Service
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - Second Compression Ring - Production
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring - Service
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Oil Control Ring - Production
0.013-0.201 mm
0.0005-0.0079 in
Piston Ring to Groove Clearance - Oil Control Ring - Service
0.013-0.201 mm
0.0005-0.0079 in
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore - Production
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Clearance to Piston Pin Bore - Service
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Diameter
23.497-23.503 mm
0.925-0.925 in
Pin - Piston Pin Fit in Connecting Rod Bore - Production
0.007-0.02 mm
0.00027-0.00078 in
Pin - Piston Pin Fit in Connecting Rod Bore - Service
0.007-0.0022 mm
0.00027-0.00086 in
Piston - Piston Diameter - Measured Over Skirt Coating
104.758-104.792 mm
4.124-4.126 in
Piston - Piston to Bore Clearance
-0.026 to +0.026 mm
-0.001 to +0.001 in
Valve System
Valves - Face Angle
45 degrees
Valves - Face Width
1.754-2.254 mm
0.069-0.089 in
Valves - Lash
Net Lash - No Adjustment
Valves - Lift - Intake
15.11 mm
0.595 in
Valves - Lift - Exhaust
15.01 mm
0.590 in
Valve Seat - Angle
45 degrees
Valve Seat - Runout
0.05 mm
0.002 in
Valve Seat - Width - Exhaust
1.7-2.0 mm
0.067-0.079 in
Valve Seat - Width - Intake
1.25-1.55 mm
0.049-0.061 in
Valves - Stem Diameter - Intake
7.958-7.9735 mm
0.313-0.314 in
Valves - Stem Diameter - Exhaust
7.956-7.976 mm
0.313-0.314 in
Valves - Stem-to-Guide Clearance - Production - Intake
0.028-0.063 mm
0.001-0.0024 in
Valves - Stem-to-Guide Clearance - Service - Intake
0.093 mm
0.0037 in
Valves - Stem-to-Guide Clearance - Production - Exhaust
0.025-0.066 mm
0.001-0.0026 in
Valves - Stem-to-Guide Clearance - Service - Exhaust
0.093 mm
0.0037 in
Rocker Arms - Rocker Arm Ratio
1.80:1
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
Originally Posted by fast98
i work at a gm dealer i have access to all the specs through gm online service information. so gm is my source. here is all of it
Engine Mechanical Specifications
General
Engine Type
V8
Displacement
7.0L
427 CID
RPO
LS7
VIN
Y/E
Bore
104.766-104.784 mm
4.125-4.125 in
Stroke
101.6 mm
4.0 in
Compression Ratio
11.0:1
Firing Order
1-8-7-2-6-5-4-3
Spark Plug Gap
1.02 mm
0.04 in
Block
Camshaft Bearing Bore 1 and 5 Diameter
59.58-59.63 mm
2.345-2.347 in
Camshaft Bearing Bore 2 and 4 Diameter
59.08-59.13 mm
2.325-2.327 in
Camshaft Bearing Bore 3 Diameter
58.58-58.63 mm
2.306-2.308 in
Crankshaft Main Bearing Bore Diameter
69.871-69.889 mm
2.75-2.751 in
Crankshaft Main Bearing Bore Out-of-Round
0.006 mm
0.0002 in
Cylinder Bore Diameter
104.766-104.784 mm
4.125-4.125 in
Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face
234.57-234.82 mm
9.235-9.245 in
Cylinder Head Deck Surface Flatness - Measured within a 152.4 mm (6.0 in) Area
0.11 mm
0.004 in
Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck
0.22 mm
0.008 in
Valve Lifter Bore Diameter
21.417-21.443 mm
0.843-0.844 in
Camshaft
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Journal Out-of-Round
0.008 mm
0.0003 in
Camshaft Lobe Lift - Intake
8.4 mm
0.331 in
Camshaft Lobe Lift - Exhaust
8.34 mm
0.328 in
Camshaft Runout - Measured at the Intermediate Journals
0.05 mm
0.002 in
Connecting Rod
Connecting Rod Bearing Clearance - Production
0.023-0.065 mm
0.0009-0.0025 in
Connecting Rod Bearing Clearance - Service
0.023-0.076 mm
0.0009-0.003 in
Connecting Rod Bore Diameter - Bearing End
56.505-56.525 mm
2.224-2.225 in
Connecting Rod Bore Diameter - Pin End
23.511-23.519 mm
0.926-0.926 in
Connecting Rod Bore Out-of-Round - Bearing End - Production
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Bore Out-of-Round - Bearing End - Service
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Side Clearance
0.11-0.51 mm
0.00433-0.02 in
Crankshaft
Connecting Rod Journal Diameter - Production
53.318-53.338 mm
2.0991-2.0999 in
Connecting Rod Journal Diameter - Service
53.308 mm
2.0987 in
Connecting Rod Journal Out-of-Round - Production
0.005 mm
0.0002 in
Connecting Rod Journal Out-of-Round - Service
0.01 mm
0.0004 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production
0.005 mm
0.0002 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service
0.02 mm
0.00078 in
Crankshaft End Play
0.04-0.2 mm
0.0015-0.0078 in
Crankshaft Main Bearing Clearance - Production
0.02-0.052 mm
0.0008-0.0021 in
Crankshaft Main Bearing Clearance - Service
0.02-0.065 mm
0.0008-0.0025 in
Crankshaft Main Journal Diameter - Production
64.992-65.008 mm
2.558-2.559 in
Crankshaft Main Journal Diameter - Service
64.992 mm
2.558 in
Crankshaft Main Journal Out-of-Round - Production
0.003 mm
0.000118 in
Crankshaft Main Journal Out-of-Round - Service
0.008 mm
0.0003 in
Crankshaft Main Journal Taper - Production
0.01 mm
0.0004 in
Crankshaft Main Journal Taper - Service
0.02 mm
0.00078 in
Crankshaft Rear Flange Runout
0.05 mm
0.002 in
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter
0.7 mm
0.028 in
Crankshaft Thrust Surface - Production
26.14-26.22 mm
1.029-1.0315 in
Crankshaft Thrust Surface - Service
26.22 mm
1.0315 in
Crankshaft Thrust Surface Runout
0.025 mm
0.001 in
Cylinder Head
Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface
127.9 mm
5.035 in
Surface Flatness - Block Deck - Measured within a 152.4 mm (6.0 in) Area
0.08 mm
0.003 in
Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head
0.1 mm
0.004 in
Surface Flatness - Exhaust Manifold Deck
0.13 mm
0.005 in
Surface Flatness - Intake Manifold Deck
0.08 mm
0.0031 in
Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide
17.32 mm
0.682 in
Intake Manifold
Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings
0.3 mm
0.118 in
Lubrication System
Oil Capacity - with Filter
7.57 liters
8.0 quarts
Oil Capacity - without Filter
7.10 liters
7.5 quarts
Oil Pressure - Minimum at 100°C (212°F)
41 kPa at 1,000 engine RPM
124 kPa at 2,000 engine RPM
165 kPa at 4,000 engine RPM
6 psig at 1,000 engine RPM
18 psig at 2,000 engine RPM
24 psig at 4,000 engine RPM
Oil Pan
Front Cover Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface
0.0-0.1 mm
0.0-0.004 in
Oil Pump Alignment - at Oil Pan Surface
0.0-0.1 mm
0.0-0.004 in
Crankshaft Rear Oil Seal Housing Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Piston Rings
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring to Groove Clearance - First Compression Ring - Production
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - First Compression Ring - Service
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - Second Compression Ring - Production
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring - Service
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Oil Control Ring - Production
0.013-0.201 mm
0.0005-0.0079 in
Piston Ring to Groove Clearance - Oil Control Ring - Service
0.013-0.201 mm
0.0005-0.0079 in
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore - Production
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Clearance to Piston Pin Bore - Service
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Diameter
23.497-23.503 mm
0.925-0.925 in
Pin - Piston Pin Fit in Connecting Rod Bore - Production
0.007-0.02 mm
0.00027-0.00078 in
Pin - Piston Pin Fit in Connecting Rod Bore - Service
0.007-0.0022 mm
0.00027-0.00086 in
Piston - Piston Diameter - Measured Over Skirt Coating
104.758-104.792 mm
4.124-4.126 in
Piston - Piston to Bore Clearance
-0.026 to +0.026 mm
-0.001 to +0.001 in
Valve System
Valves - Face Angle
45 degrees
Valves - Face Width
1.754-2.254 mm
0.069-0.089 in
Valves - Lash
Net Lash - No Adjustment
Valves - Lift - Intake
15.11 mm
0.595 in
Valves - Lift - Exhaust
15.01 mm
0.590 in
Valve Seat - Angle
45 degrees
Valve Seat - Runout
0.05 mm
0.002 in
Valve Seat - Width - Exhaust
1.7-2.0 mm
0.067-0.079 in
Valve Seat - Width - Intake
1.25-1.55 mm
0.049-0.061 in
Valves - Stem Diameter - Intake
7.958-7.9735 mm
0.313-0.314 in
Valves - Stem Diameter - Exhaust
7.956-7.976 mm
0.313-0.314 in
Valves - Stem-to-Guide Clearance - Production - Intake
0.028-0.063 mm
0.001-0.0024 in
Valves - Stem-to-Guide Clearance - Service - Intake
0.093 mm
0.0037 in
Valves - Stem-to-Guide Clearance - Production - Exhaust
0.025-0.066 mm
0.001-0.0026 in
Valves - Stem-to-Guide Clearance - Service - Exhaust
0.093 mm
0.0037 in
Rocker Arms - Rocker Arm Ratio
1.80:1
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
Engine Mechanical Specifications
General
Engine Type
V8
Displacement
7.0L
427 CID
RPO
LS7
VIN
Y/E
Bore
104.766-104.784 mm
4.125-4.125 in
Stroke
101.6 mm
4.0 in
Compression Ratio
11.0:1
Firing Order
1-8-7-2-6-5-4-3
Spark Plug Gap
1.02 mm
0.04 in
Block
Camshaft Bearing Bore 1 and 5 Diameter
59.58-59.63 mm
2.345-2.347 in
Camshaft Bearing Bore 2 and 4 Diameter
59.08-59.13 mm
2.325-2.327 in
Camshaft Bearing Bore 3 Diameter
58.58-58.63 mm
2.306-2.308 in
Crankshaft Main Bearing Bore Diameter
69.871-69.889 mm
2.75-2.751 in
Crankshaft Main Bearing Bore Out-of-Round
0.006 mm
0.0002 in
Cylinder Bore Diameter
104.766-104.784 mm
4.125-4.125 in
Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face
234.57-234.82 mm
9.235-9.245 in
Cylinder Head Deck Surface Flatness - Measured within a 152.4 mm (6.0 in) Area
0.11 mm
0.004 in
Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck
0.22 mm
0.008 in
Valve Lifter Bore Diameter
21.417-21.443 mm
0.843-0.844 in
Camshaft
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Journal Out-of-Round
0.008 mm
0.0003 in
Camshaft Lobe Lift - Intake
8.4 mm
0.331 in
Camshaft Lobe Lift - Exhaust
8.34 mm
0.328 in
Camshaft Runout - Measured at the Intermediate Journals
0.05 mm
0.002 in
Connecting Rod
Connecting Rod Bearing Clearance - Production
0.023-0.065 mm
0.0009-0.0025 in
Connecting Rod Bearing Clearance - Service
0.023-0.076 mm
0.0009-0.003 in
Connecting Rod Bore Diameter - Bearing End
56.505-56.525 mm
2.224-2.225 in
Connecting Rod Bore Diameter - Pin End
23.511-23.519 mm
0.926-0.926 in
Connecting Rod Bore Out-of-Round - Bearing End - Production
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Bore Out-of-Round - Bearing End - Service
0.004-0.008 mm
0.00015-0.0003 in
Connecting Rod Side Clearance
0.11-0.51 mm
0.00433-0.02 in
Crankshaft
Connecting Rod Journal Diameter - Production
53.318-53.338 mm
2.0991-2.0999 in
Connecting Rod Journal Diameter - Service
53.308 mm
2.0987 in
Connecting Rod Journal Out-of-Round - Production
0.005 mm
0.0002 in
Connecting Rod Journal Out-of-Round - Service
0.01 mm
0.0004 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production
0.005 mm
0.0002 in
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service
0.02 mm
0.00078 in
Crankshaft End Play
0.04-0.2 mm
0.0015-0.0078 in
Crankshaft Main Bearing Clearance - Production
0.02-0.052 mm
0.0008-0.0021 in
Crankshaft Main Bearing Clearance - Service
0.02-0.065 mm
0.0008-0.0025 in
Crankshaft Main Journal Diameter - Production
64.992-65.008 mm
2.558-2.559 in
Crankshaft Main Journal Diameter - Service
64.992 mm
2.558 in
Crankshaft Main Journal Out-of-Round - Production
0.003 mm
0.000118 in
Crankshaft Main Journal Out-of-Round - Service
0.008 mm
0.0003 in
Crankshaft Main Journal Taper - Production
0.01 mm
0.0004 in
Crankshaft Main Journal Taper - Service
0.02 mm
0.00078 in
Crankshaft Rear Flange Runout
0.05 mm
0.002 in
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter
0.7 mm
0.028 in
Crankshaft Thrust Surface - Production
26.14-26.22 mm
1.029-1.0315 in
Crankshaft Thrust Surface - Service
26.22 mm
1.0315 in
Crankshaft Thrust Surface Runout
0.025 mm
0.001 in
Cylinder Head
Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface
127.9 mm
5.035 in
Surface Flatness - Block Deck - Measured within a 152.4 mm (6.0 in) Area
0.08 mm
0.003 in
Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head
0.1 mm
0.004 in
Surface Flatness - Exhaust Manifold Deck
0.13 mm
0.005 in
Surface Flatness - Intake Manifold Deck
0.08 mm
0.0031 in
Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide
17.32 mm
0.682 in
Intake Manifold
Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings
0.3 mm
0.118 in
Lubrication System
Oil Capacity - with Filter
7.57 liters
8.0 quarts
Oil Capacity - without Filter
7.10 liters
7.5 quarts
Oil Pressure - Minimum at 100°C (212°F)
41 kPa at 1,000 engine RPM
124 kPa at 2,000 engine RPM
165 kPa at 4,000 engine RPM
6 psig at 1,000 engine RPM
18 psig at 2,000 engine RPM
24 psig at 4,000 engine RPM
Oil Pan
Front Cover Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface
0.0-0.1 mm
0.0-0.004 in
Oil Pump Alignment - at Oil Pan Surface
0.0-0.1 mm
0.0-0.004 in
Crankshaft Rear Oil Seal Housing Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Piston Rings
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service
0.22-0.47 mm
0.0087-0.0185 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service
0.40-0.66 mm
0.0157-0.0259 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service
0.25-0.76 mm
0.0098-0.0299 in
Piston Ring to Groove Clearance - First Compression Ring - Production
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - First Compression Ring - Service
0.030-0.10 mm
0.0012-0.0040 in
Piston Ring to Groove Clearance - Second Compression Ring - Production
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring - Service
0.035-0.078 mm
0.0014-0.0031 in
Piston Ring to Groove Clearance - Oil Control Ring - Production
0.013-0.201 mm
0.0005-0.0079 in
Piston Ring to Groove Clearance - Oil Control Ring - Service
0.013-0.201 mm
0.0005-0.0079 in
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore - Production
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Clearance to Piston Pin Bore - Service
0.008-0.023 mm
0.0003-0.0009 in
Pin - Piston Pin Diameter
23.497-23.503 mm
0.925-0.925 in
Pin - Piston Pin Fit in Connecting Rod Bore - Production
0.007-0.02 mm
0.00027-0.00078 in
Pin - Piston Pin Fit in Connecting Rod Bore - Service
0.007-0.0022 mm
0.00027-0.00086 in
Piston - Piston Diameter - Measured Over Skirt Coating
104.758-104.792 mm
4.124-4.126 in
Piston - Piston to Bore Clearance
-0.026 to +0.026 mm
-0.001 to +0.001 in
Valve System
Valves - Face Angle
45 degrees
Valves - Face Width
1.754-2.254 mm
0.069-0.089 in
Valves - Lash
Net Lash - No Adjustment
Valves - Lift - Intake
15.11 mm
0.595 in
Valves - Lift - Exhaust
15.01 mm
0.590 in
Valve Seat - Angle
45 degrees
Valve Seat - Runout
0.05 mm
0.002 in
Valve Seat - Width - Exhaust
1.7-2.0 mm
0.067-0.079 in
Valve Seat - Width - Intake
1.25-1.55 mm
0.049-0.061 in
Valves - Stem Diameter - Intake
7.958-7.9735 mm
0.313-0.314 in
Valves - Stem Diameter - Exhaust
7.956-7.976 mm
0.313-0.314 in
Valves - Stem-to-Guide Clearance - Production - Intake
0.028-0.063 mm
0.001-0.0024 in
Valves - Stem-to-Guide Clearance - Service - Intake
0.093 mm
0.0037 in
Valves - Stem-to-Guide Clearance - Production - Exhaust
0.025-0.066 mm
0.001-0.0026 in
Valves - Stem-to-Guide Clearance - Service - Exhaust
0.093 mm
0.0037 in
Rocker Arms - Rocker Arm Ratio
1.80:1
Valve Springs - Free Length
58.8 mm
2.313 in
Valve Springs - Installed Height
49.75 mm
1.959 in
Valve Springs - Load - Closed
450 N at 49.75 mm
101 lb at 1.96 in
Valve Springs - Load - Open
1380 N at 34.75 mm
310 lb at 1.37 in
