I was prety sure I'd buy the GM sensor and I will get off my wallet and buy the new gaskets
Intake manifold upgrade
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 2,170
Likes: 6
From: Oilerville Edmonton
St. Jude Donor '08
Intake manifold upgrade
I will be replacing my ls1 intake with an ls6. I just have a few questions beofre I get going.
1. can I reuse the gaskets if they look alright? car has 60k miles on it.
2. I will be replacing the oil pressure sending unit. can I use an auto part store unit or should I get a GM unit?
3. should I do the knock sensor TSB while I'm there? Do I use RTV?
thanks for any help you can provide
1. can I reuse the gaskets if they look alright? car has 60k miles on it.
2. I will be replacing the oil pressure sending unit. can I use an auto part store unit or should I get a GM unit?
3. should I do the knock sensor TSB while I'm there? Do I use RTV?
thanks for any help you can provide
Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
1. you can but they are cheap to replace. I would replace if I were you.
2. I used a AC/Delco all brass (don't remember the part number)
3. yes
you might consider changing out the valley cover for a late model with the built in PVC valve. They can be purchase new for @ $75
2. I used a AC/Delco all brass (don't remember the part number)
3. yes
you might consider changing out the valley cover for a late model with the built in PVC valve. They can be purchase new for @ $75
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
I will be replacing my ls1 intake with an ls6. I just have a few questions beofre I get going.
1. can I reuse the gaskets if they look alright? car has 60k miles on it.
thanks for any help you can provide
1. can I reuse the gaskets if they look alright? car has 60k miles on it.
Less risk of having issues if you replace them.
2. I will be replacing the oil pressure sending unit. can I use an auto part store unit or should I get a GM unit? The GM replacement would be my choice, it will be aluminum, it really doesn't matter what it is made out of. Take care not to over torque it.
3. should I do the knock sensor TSB while I'm there? Do I use RTV?I can't think of a good reason not too.
thanks for any help you can provide
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Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
FYI: I did the oil pressure sending unit thing twice. First one I bought at rock auto, the second one at the dealership. They are exactly the same and made in Mexico - even the silkscreen numbers are the same. The only difference is the price.
When doing that job - if the original has failed - be sure to use electrical contact cleaner on the harness side of the connector. If you shove an oily plug on a new sensor - that sensor has a short life.
Another suggestion - for the rear bolts, use tape to hold them up as you're removing the manifold. Works like a charm
When installing the new manifold, I've found that the best way to attach that little vacuum line feeding the HVAC system is to take the 90* elbow completely off and first attach it to the tiny plastic line - then attach it to the manifold after you get it positioned properly. The other way around is challenging.
Other notables - the breaking off of the supporting ribs under the manifold to keep your existing coolant lines works well. That will save you $50. Look it up on youtube.
I have reused gasket and used new gaskets - I would get new. I installed Felpro silicone gaskets from autozone for like $20.
When doing that job - if the original has failed - be sure to use electrical contact cleaner on the harness side of the connector. If you shove an oily plug on a new sensor - that sensor has a short life.
Another suggestion - for the rear bolts, use tape to hold them up as you're removing the manifold. Works like a charm
When installing the new manifold, I've found that the best way to attach that little vacuum line feeding the HVAC system is to take the 90* elbow completely off and first attach it to the tiny plastic line - then attach it to the manifold after you get it positioned properly. The other way around is challenging.
Other notables - the breaking off of the supporting ribs under the manifold to keep your existing coolant lines works well. That will save you $50. Look it up on youtube.
I have reused gasket and used new gaskets - I would get new. I installed Felpro silicone gaskets from autozone for like $20.
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 2,170
Likes: 6
From: Oilerville Edmonton
St. Jude Donor '08
thanks for all the tips mitchcole. I have a price from an auto store for gaskets and oil unit and am waiting on my GM employee pricing from my dealer. it will be interesting to see the difference.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
While the manifold is off---look insde of it with a flashlight---You will be shocked by the amount of oil in there---LS1's are notorious for sucking oil into the manifold via the PCV system--That's why there is a huge aftermarket supply of "catch can " devices to clean it up-- As suggested a good upgrade is to replace the LS1 valley with an LS6 valley--this re-routes how the PCV pulls the vauum and aids in cleaning up the oil--You will have to do some minor grinding on one corner of the engine top for clearance but instructions come with it and its easy---
Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
While the manifold is off---look insde of it with a flashlight---You will be shocked by the amount of oil in there---LS1's are notorious for sucking oil into the manifold via the PCV system--That's why there is a huge aftermarket supply of "catch can " devices to clean it up-- As suggested a good upgrade is to replace the LS1 valley with an LS6 valley--this re-routes how the PCV pulls the vauum and aids in cleaning up the oil--You will have to do some minor grinding on one corner of the engine top for clearance but instructions come with it and its easy---
I know my '02 didn't require any grinding.
OP, the catch cans do work great with the LS6 PVC system.
