Notmyvette

iTrader: (1)

What's the bearing oil clearances on the main and rods on a stock internaled LS1?...Just a daily driver with a cam

Also noticed only some of the upper main caps have the bearing tang grooves on both sides of the cap sooo I put the tang on the same side as the lower tang right? Driver side I believe...

And does the #1 main cap start at the Front of the engine? then 2, 3, 4, and 5...and the number 5 is upside down OR the cap goes 180 degrees and the number 5 is on the opposite side of the other numbers?

Anybody got pics of how the numbers and caps go? or description or something...
thanks

Ryan72

Connecting rod
Bearing Clearance (Production): 0.015-0.063mm / 0.0006-0.00248"
Bearing Clearance (Service Limit): 0.015-0.076mm/0.0006-0.003"
Mains
Bearing Clearance (Production): 0.018-0.054mm / 0.0007-0.00212"



Uh, no.
The Block side main bearings- tangs will be located towards the rear, on the #1 cylinder side of the engine.
The Main Cap bearings- tangs will be located towards the front, on the #2 cylinder side of the engine.


Yep you got it.
1 is at the front. 1,2,3,4 are all stamped on the #1 cylinder side of the engine.
The #5 main has the 5 stamped into it on the opposite #2 cylinder side of the engine.
All numbers are stamped so they can be read from the rear of the engine.

Ryan72

I just mic'd my crankshaft today, everything looks great, all the journals are good and came to within about .0002" of each other and i couldnt find anything more than .0002" out of round.
now to order some bearings and measure the other half...


Oh what the hell....
while we're at it...



LS1/LS6 Engine Dimensions & Clearances
Production = (P), Service Limit = (SL), Out-of-Round = O-o-R
Run Out = RO, Inside Dia. = ID, Outside Dia. = OD

CAMSHAFT:
Base Circle Dia.:
'97-'04 LS1 = 19.7mm / 0.776"
'01 LS6 = 19.3mm / 0.760"
'02 -'04 LS6 = 19.0mm / 0.748
End Play: 0.025-0.305mm / 0.001-0.012"
Journal Dia.: 54.99-55.04mm / 2.164-2.166"
Journal Dia. O-o-R: 0.025mm / 0.001"
Intake Lobe Lift: 7.04mm / 0.277"
Exhaust Lobe Lift: 7.13mm / 0.281"
Poller Lifter Dia.: 17.78mm / 0.700"
RO @ Intermediate Journals: 0.05mm / 0.002"
Lobe Base Circle Radius:
'97-'04 LS1: 19.7mm / 0.776"
'01 LS6: 19.3mm / 0.760" (reduced for ^ valve lift)
'02-'04 LS6: 19.0mm / 0.748 " " " " " "

CONNECTING ROD:
Bearing Bore Dia.: 56.505-56.525mm / 2.224-2.225"
Bearing Bore O-o-R (P): 0.004mm / 0.00015"
Bearing Bore O-o-R (SL): 0.008mm / 0.0003"
Bearing Clearance (P): 0.015-0.063mm / 0.0006-0.00248"
Bearing Clearance (SL): 0.015-0.076mm/0.0006-0.003"
Bearing Width: 24mm / 0.9449"
Side Clearance: 0.11-0.51mm / 0.00433-0.02"
Center to Center: 154.89mm / 6.098"
Piston Pin Bore Dia.: 23.97mm / 0.9436"
Piston Pin Boss Width: 24mm / 0.9449"
Piston Pin Press Interference:0.020-0.043mm / 0.0008-0.0017"
Rod Bolts: M9 x 1" (replace with ARP/Katech if > 450HP)

CRANKSHAFT:
Rotation = Clockwise (looking at front of block)
Bearing Clearance (P): 0.018-0.054mm / 0.0007-0.00212"
Con Rod Journal Dia. (P): 53.318-53.338mm / 2.0991-2.0999"
Con Rod Journal Dia. (SL): 53.308mm Min. / 2.0987" Min.
Con Rod Journal Taper (P): 0.005mm / 0.0002"
(Maximum for 1/2 Journal length)
Con Rod Journal Taper (SL): 0.01mm Max. / 0.0004" Max.
Con Rod Journal O-o-R (P): 0.005mm / 0.0002"
Con Rod Journal O-o-R (SL): 0.01mm / 0.0004"
Con Rod Journal Width: 48.37mm / 1.902"
End Play: 0.04-0.2mm /0.0015-0.0078"
Main Journal Dia. (P): 64.993-65.007mm / 2.558-2.559"
Main Journal Dia. (SL): 64.993mm Min. / 2.558" Min.
Main Journal O-o-R (P): 0.003mm / 0.000118"
Main Journal O-o-R (SL): 0.008mm / 0.0003
Main Journal Taper (P): 0.01mm / 0.0004"
Main Journal Taper (SL): 0.02mm / 0.00078"
Main Journal Width: 22.99mm / 0.905"
Reluctor Ring RO: 0.25mm / 0.01"
(Measured @ 1.0mm/0.04" below tooth Dia.)
Crank RO : 0.05mm / 0.002" (Measured at rear flange)
Flywheel Bolt Base Circle: 78.99mm / 3.110"
Stroke: 92mm / 3.622"
Rear Seal ID: 114.99mm / 4.527"
Thrust Wall RO: 0.025mm / 0.001"
Thrust Wall Width (P): 26.14-26.22mm / 1.029-1.032"
Thrust Wall Width (SL): 26.32 Max. / 1.036" Max.

CYLINDER BORE:
Bore Dia.: 99.0-99.018mm / 3.897-3.898"
Bore Taper Thrust Side: 0.018mm Max. / 0.0007" Max.
Bank Angle = 45 degrees
Cylinder Bank Offset: 24.10mm / 0.949"

CYLINDER HEAD: A356 T6
Block Deck Flatness: 0.11mm / 0.004" (within a 6" area)
Block Deck Flatness: 0.22mm / 0.008" (length of head)
Exhaust Manifold Deck Flatness: 0.22mm / 0.008"
Intake Manifold Deck Flatness: 0.22mm / 0.008"
Height: 120.2mm / 4.732" (Deck to Rocker Cover Surfaces)
Valve Angle: 15 degrees
Valve Guide Material = Sintered Iron (Press IN)
Valve Guide Seperation: 48.6mm / 1.913"
Valve Seat Angles: 30/45/60 degree blend into chamber
Valve Stem Dia.: 8.001mm / 0.315"

ENGINE BLOCK: A319 T5 / 107#'s
Length: 519mm / 20.43"
Width: 460mm / 18.11"
Deck Height: 234.57-234.82mm / 9.235-9.245"
Cylinder Bank Angle = 45 degrees
Cylinder Bank Offset: 24.10mm / 0.949"
Center Main = Crank Thrust Wall #3
Indexing = Crank CenterLine
Camshaft Bearing Bore Dia.: 55.063-55.088mm / 2.168-2.169"
Block Deck Flatness: 0.11mm / 0.004" (measured within 6")
Block Deck Flatness: 0.22mm / 0.008" (length of Deck)
Main Bearing Bore Dia. (P): 69.871-69.889mm / 2.750-2.751"
Valve Lifter Bore Dia. (P):21.417-21.443 / 0.843-0.844"

FUEL INJECTION:
LS1 Static Flow Rate = 3.6 gal/sec.
Cranking Fuel pressure = 53 to 63 psi



IGNITION:
Coil Output = 60mJ
Sparkplug Wire length = 219mm
Sparkplug Type = AC 41-931 / Beru Silverstone S1K
Sparkplug gap = 1.5mm / 0.060"

INTAKE MANIFOLD;
Head Deck Flatness: 0.5mm / 0.02" @ gasket mating surface
LS1 MAF ID = 75mm
LS1 Throttle Body ID = 75mm
LS6 MAF ID = 80mm
LS6 Throttle Body ID = 80mm

OIL PAN & FRONT/REAR COVER Alignment:
Oil Pan to Rear of Block: 0.0-0.25mm / 0.0-0.01"
(@ Bellhousing Surface)
Front Cover: 0.0-0.5mm / 0.0-0.2" (@ Oil Pan Surface)
Rear Cover: 0.0-0.5mm / 0.0-0.2" (@ Oil Pan Surface)

OIL PUMP:
Dia: 89.99mm / 3.543"
Gear Thickness: 10.69mm / 0.421"
Pressure Relief Setting (Factory): 60 psig @ 5,000 RPM

PISTONS: Cast Eutectic Aluminum, +'03 have coated skirts
Weight = 434 grams
Piston OD: 98.964-98.982mm / 3.8962-3.8969"
Piston to Bore Clearance(P): 0.018-0.054mm/0.0007-0.00212"
Piston to Bore Clear. (SL): 0.018-0.054mm / 0.0007-0.00212"
(Maximum)
Piston Deck Height in Operation: 0.203mm / 0.008"
(Above Deck Surface)
Top Land Thickness: 34mm / 0.177"

PISTON PINS:
Pin to Piston Bore (P): 0.01-0.02mm / 0.0004-0.00078"
Pin to Piston Bore (SL): 0.01-0.02mm / 0.0004-0.00078" Max.
Pin Dia.: 23.997-24.0mm / 0.9447-0.9448"
Pin Fit in Con Rod: 0.02-0.043mm / 0.00078-0.00169"
(Interference)

PISTON RINGS:
Top Comp. Thickness: 1.500mm / 0.59"
Top Comp. Gap Clocking: None Required
Top Comp. End Gap (P): 0.23-0.38mm / 0.009-0.0149"
Top Comp. End Gap (SL): 0.23-0.38mm / 0.009-0.0149" Max.
Top Comp. Groove (P):0.04-0.085mm / 0.00157-0.003346"
Top Comp. Groove (SL):0.04-0.085mm/0.00157-0.003346"Max.
2nd Comp. Thickness: 1.500mm / 0.59"
Top Comp Gap Clocking: None Required
2nd Comp. End Gap (P): 0.44-0.64mm / 0.0173-0.0251"
2nd Comp. End gap (SL): 0.44-0.64mm / 0.0173-0.0251" Max.
2nd Comp. Groove (P): 0.04-0.08mm / 0.00157-0.003149"
2nd Comp. Groove (SL):0.04-0.08mm/0.00157-0.003149"Max.
Oil Cont. Rail Thickness (2): 3.00mm / .188" (EACH)
Oil Cont. Top Rail Gap Clocking: 25 degrees from Top Ring
Oil Cont. 2nd Rail gap Clocking: 25 degrees from Expander
Oil Cont. End Gap (P): 0.18-0.69mm / 0.007-0.0271"
Oil Cont. End Gap (SL): 0.18-0.69mm / 0.007-0.0271" Max.
Oil Cont. Groove (P): 0.01-0.22mm / 0.0004-0.00866"
Oil Cont. Groove (SL):0.01-0.22mm / 0.0004-0.00866" Max.

VALVETRAIN:Hydraulic Roller
Rocker Arm Ratio = 1.70:1
Valve Lash Net Lash: No Adjustment
Valve Face Angle = 45 degrees
Valve Seat Angle = 46 degrees
Valve Seat RO: 0.05mm / 0.002" Max.
Valve Seat Width (Intake) = 1.02mm / 0.04"
Valve Seat Width (Exhaust) = 1.78mm / 0.07"
Valve Stem:
Clearances:
Intake (P): 0.025-0.066mm / 0.001-0.0026"
Intake (SL): 0.093mm / 0.0037" Max.
Exhaust (P): 0.025-0.066mm / 0.001-0.0026"
Exhaust (SL): 0.093mm / 0.0037" Max
Oil Seal Installed Height = 18.1-19.1mm / 0.712-0.752"
(Measured from VS Shim toTop Edge od Seal Body)
Valve Stem Dia. (P): 7.955-7.976mm / 0.313-0.314"
Valve Stem Dia. (SL) 7.9mm / 0.311 Min.
Valve Spring:
Free Length = 52.9mm / 2.08"
Pressure (Closed) = 340 N @ 45.75mm / 76# @ 1.80"
Pressure (Open) = 980 N @ 33.55mm / 220# @ 1.32"
Installed Height (Intake) = 45.75mm / 1.800"
Installed Height (Exhaust) = 45.75mm / 1.8"
Valve Guide Installed Height = 17.32mm / 0.682"
(Measured from Spring Seat Surface to Top of valve Guide)
Roller Lifter Dia.:17.78mm / 0.700"
Valve Material: Stainless Steel, Hollow Stems, Na filled Exhaust
Net Valve Lift: Intake/Exhaust
'97-00 LS1: 0.472" (11.99mm) / 0.479" (12.17mm)
'01 LS6: 0.525" (13.34mm) / 0.551" (13.33mm)
'02-'04 LS6: 0.525" (14.01mm) / 0.547" (13.91mm)


stole this from z06vette.com

Notmyvette

iTrader: (1)

Sweet thanks, seeing the numbers upside down confused me. I'm saving all the specs in a text document...But when I throw the rings on does it matter which way I stagger the ring end gaps? I normally do it 180 degrees apart from the top and bottom one and not on the thrust sides....but I don't know if there's something special to do with these motors...does everybody place the top and bottom ring gaps 180 apart too?

-Joseph-

iTrader: (12)

I stagger oil ring gaps at least 90 degree's apart, then align the 2nd ring gap in the location furthest in location from each oil ring gap (if oil rings at 10 and 2, put 2nd gap at 6). Top ring 180 from 2nd ring gap.

Notmyvette

iTrader: (1)

Sounds like that method keeps all the gaps away from both thrust sides of the piston too.

and Nice times with that stang, I'm building up a forged 408 and I got a qtk precision 76mm kit either for that or another stang I got...