LS1 Dart head Issues All read
03-23-2006, 01:07 PM
#81
First of all, if you check the fit of the rocker bridge on stock heads it is very sloppy it does nothing to hold the rockers alined! You don't have to grind the tabs completly off to fit the Dart heads you only grind about 1/4" off the two middle tabs, then they fit better than they did on the stock heads!
03-23-2006, 03:07 PM
#82
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Originally Posted by Futral Motorsports
First of all, if you check the fit of the rocker bridge on stock heads it is very sloppy it does nothing to hold the rockers alined! You don't have to grind the tabs completly off to fit the Dart heads you only grind about 1/4" off the two middle tabs, then they fit better than they did on the stock heads!
03-24-2006, 08:16 PM
#86
Originally Posted by NOT-MEE
Ok guys at this point it was not install related.
We found the problem ill post pictures and explain tonight.
It was a Dart Issue
We found the problem ill post pictures and explain tonight.
It was a Dart Issue
03-24-2006, 08:17 PM
#87
Originally Posted by NOT-MEE
Ok guys at this point it was not install related.
We found the problem ill post pictures and explain tonight.
It was a Dart Issue
We found the problem ill post pictures and explain tonight.
It was a Dart Issue
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
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2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
03-24-2006, 09:10 PM
#88
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Rocker arm reinstallation procedure Document ID# 281433
1999 Chevrolet/Geo Camaro
--------------------------------------------------------------------------------
Valve Rocker Arm and Push Rod Installation
Important
When using the valve train components again, always install the components to the original location and position.
Valve lash is net build, no valve adjustment is required.
Lubricate the valve rocker arms and pushrods with clean engine oil.
Lubricate the flange of the valve rocker arm bolts with clean engine oil. Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
Install the valve rocker arm pivot support.
Important
Ensure that the pushrods seat properly to the valve lifter sockets.
Install the pushrods.
Important
Ensure that the pushrods seat properly to the ends of the rocker arms.
DO NOT tighten the rocker arm bolts at this time.
Install the rocker arms and bolts.
Rotate the crankshaft until number one piston is at top dead center of compression stroke. In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position. The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5 and 7 are left bank. Cylinders 2, 4, 6, and 8 are right bank.
Notice
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
With the engine in the number one firing position, tighten the following valve rocker arm bolts: Tighten
Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).
Rotate the crankshaft 360 degrees.
Tighten the following valve rocker arm bolts: Tighten
Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).
--------------------------------------------------------------------------------
Document ID# 281433
1999 Chevrolet/Geo Camaro
1999 Chevrolet/Geo Camaro
--------------------------------------------------------------------------------
Valve Rocker Arm and Push Rod Installation
Important
When using the valve train components again, always install the components to the original location and position.
Valve lash is net build, no valve adjustment is required.
Lubricate the valve rocker arms and pushrods with clean engine oil.
Lubricate the flange of the valve rocker arm bolts with clean engine oil. Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
Install the valve rocker arm pivot support.
Important
Ensure that the pushrods seat properly to the valve lifter sockets.
Install the pushrods.
Important
Ensure that the pushrods seat properly to the ends of the rocker arms.
DO NOT tighten the rocker arm bolts at this time.
Install the rocker arms and bolts.
Rotate the crankshaft until number one piston is at top dead center of compression stroke. In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position. The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5 and 7 are left bank. Cylinders 2, 4, 6, and 8 are right bank.
Notice
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
With the engine in the number one firing position, tighten the following valve rocker arm bolts: Tighten
Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).
Rotate the crankshaft 360 degrees.
Tighten the following valve rocker arm bolts: Tighten
Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).
--------------------------------------------------------------------------------
Document ID# 281433
1999 Chevrolet/Geo Camaro
03-24-2006, 09:27 PM
#89
Staging Lane
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First off I want to thank
Bob from Precision Motorsports of Florida http://www.precisionporting.com/
Arvil & Chris Fron Xtreme Hp http://www.xhpsolutions.com/
We pulled the valve-train again today. Started putting a set of Jessel rocker supplied By Bob. After clearancing the Jesel rocker guide Chris placed the rocker guide on the heads and it was not sitting Flat. We statrted inspecting the tray where the guide sits.Below you will find a picture of what we found.
Someone missed some deburring at dart after the initial machine work was done. This explains all issues we have been having. Chris trimmed the head to remove the excess material. The jesel rockers bolted up and looks like all is well.We will pull the valve cover after a few days. I have spent quite a bit cash getting this sorted out. I had a conversation with John from dart today and they are making some changes to the CNC process to clearance the valve cover bosses to make Comp and Jesel shaft rockers bolt right on.
Thank to Chris giving them the info needed to make the changes.
John and I will be talking next week to update him on how the heads are
doing.
Thanks to all of you
Brian
Bob from Precision Motorsports of Florida http://www.precisionporting.com/
Arvil & Chris Fron Xtreme Hp http://www.xhpsolutions.com/
We pulled the valve-train again today. Started putting a set of Jessel rocker supplied By Bob. After clearancing the Jesel rocker guide Chris placed the rocker guide on the heads and it was not sitting Flat. We statrted inspecting the tray where the guide sits.Below you will find a picture of what we found.
Someone missed some deburring at dart after the initial machine work was done. This explains all issues we have been having. Chris trimmed the head to remove the excess material. The jesel rockers bolted up and looks like all is well.We will pull the valve cover after a few days. I have spent quite a bit cash getting this sorted out. I had a conversation with John from dart today and they are making some changes to the CNC process to clearance the valve cover bosses to make Comp and Jesel shaft rockers bolt right on.
Thank to Chris giving them the info needed to make the changes.
John and I will be talking next week to update him on how the heads are
doing.
Thanks to all of you
Brian
03-24-2006, 09:39 PM
#90
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Originally Posted by Patrick G
Start a new thread when you post the pictures and explanation.
https://ls1tech.com/forums/showthrea...17#post4485817
03-25-2006, 12:33 PM
#91
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Originally Posted by NOT-MEE
The only solution I can come up with is shaft mounted rockers like the ones from comp cams.
They Retail $1142.00
They Retail $1142.00
03-26-2006, 10:41 PM
#92
Originally Posted by the judge
I have a used set on car 100 miles or less with spacers 700 for everything. Went with 11 degree heads cant us them.
Was it a geometry issue or clearance issue?
