Swap to LS6 - loctite needed?
12-26-2009, 07:29 PM
#2
Safety Car
Looked it up for ya.
Apply threadlock GM U.S. P/N 12345382, Canada P/N 10953489, or equivalent to the threads of the intake manifold bolts (1).
Install the fuel rail stop bracket (2).
Install the intake manifold bolts (1).
Tighten the intake manifold bolts a first pass in sequence to 5 N·m (44 lb in).
Tighten the intake manifold bolts a final pass in sequence to 10 N·m (89 lb in).
Apply threadlock GM U.S. P/N 12345382, Canada P/N 10953489, or equivalent to the threads of the intake manifold bolts (1).
Install the fuel rail stop bracket (2).
Install the intake manifold bolts (1).
Tighten the intake manifold bolts a first pass in sequence to 5 N·m (44 lb in).
Tighten the intake manifold bolts a final pass in sequence to 10 N·m (89 lb in).
Last edited by Chris Stewart; 12-26-2009 at 07:35 PM. Reason: added pic
12-26-2009, 07:37 PM
#3
Drifting
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Looked it up for ya.
Apply threadlock GM U.S. P/N 12345382, Canada P/N 10953489, or equivalent to the threads of the intake manifold bolts (1).
Install the fuel rail stop bracket (2).
Install the intake manifold bolts (1).
Tighten the intake manifold bolts a first pass in sequence to 5 N·m (44 lb in).
Tighten the intake manifold bolts a final pass in sequence to 10 N·m (89 lb in).
Apply threadlock GM U.S. P/N 12345382, Canada P/N 10953489, or equivalent to the threads of the intake manifold bolts (1).
Install the fuel rail stop bracket (2).
Install the intake manifold bolts (1).
Tighten the intake manifold bolts a first pass in sequence to 5 N·m (44 lb in).
Tighten the intake manifold bolts a final pass in sequence to 10 N·m (89 lb in).
12-27-2009, 09:51 PM
#7
MFIC
I would not follow the instructions above for blind holes on our aluminum engines. just coat the threads on the bolts do not put anything in the holes of anything aluminum.
My 2 cents
My 2 cents
12-27-2009, 10:03 PM
#8
Drifting
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According to what I have been reading in the forum most installers don't use any loctite/permatex. I am confused...
12-28-2009, 08:07 AM
#9
Team Owner
There is another thread running with the same question. I have had my intake off a number of times. At first I used the GM procedure and the specified thread locker. However, after a while it became a pain because to properly apply each removal all parts must be cleaned for the Loctite to work. Now I install without it and have not had any issues. The Loctite will also seal the threads and the bolts go into the motor internals so there is oil vapor/oil in proximity to the bolt so there could be some seepage without using Loctite.
I also use my own tightening sequence with the FAST that differs from GM to make sure the intake is slowly brought into contact with the heads and is even. The FAST is much more flexible hence my modified procedure. This procedure takes much longer and the issue I found with the Loctite is that because it is anaerobic it was setting up on me before the manifold was tight.
I also use my own tightening sequence with the FAST that differs from GM to make sure the intake is slowly brought into contact with the heads and is even. The FAST is much more flexible hence my modified procedure. This procedure takes much longer and the issue I found with the Loctite is that because it is anaerobic it was setting up on me before the manifold was tight.
Last edited by vettenuts; 12-28-2009 at 08:09 AM.
12-28-2009, 08:47 AM
#10
Safety Car
The Blue Loctite is only rated to 195 degrees F not C so the Permatex is the better product as far as heat is concerned. I used the Blue Loctite at first and it broke down, i.e. turned brown and the consistency of sand.
Yes, as vettenuts has stated if you use it, you have to make sure you clean all surfaces thoroughly before you reinstall. And I agree that due to the mounting holes being blind the potential for buildup, especially at the bottom of the holes is greater if you use it rather than not.
Yes, as vettenuts has stated if you use it, you have to make sure you clean all surfaces thoroughly before you reinstall. And I agree that due to the mounting holes being blind the potential for buildup, especially at the bottom of the holes is greater if you use it rather than not.
12-28-2009, 03:29 PM
#12
Drifting
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The Blue Loctite is only rated to 195 degrees F not C so the Permatex is the better product as far as heat is concerned. I used the Blue Loctite at first and it broke down, i.e. turned brown and the consistency of sand.
Yes, as vettenuts has stated if you use it, you have to make sure you clean all surfaces thoroughly before you reinstall. And I agree that due to the mounting holes being blind the potential for buildup, especially at the bottom of the holes is greater if you use it rather than not.
Yes, as vettenuts has stated if you use it, you have to make sure you clean all surfaces thoroughly before you reinstall. And I agree that due to the mounting holes being blind the potential for buildup, especially at the bottom of the holes is greater if you use it rather than not.
12-28-2009, 03:59 PM
#14
Tech Contributor
You just gotta love this forum sometimes...some poor guy just trying to do the job right, and in this circumstance....following the service manual will ensure that end. You would think there would be some sort of agreement, but instead........disparity.....Just f$&king comical sometimes.........
Rock on
Rock on
12-28-2009, 04:19 PM
#15
Drifting
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You just gotta love this forum sometimes...some poor guy just trying to do the job right, and in this circumstance....following the service manual will ensure that end. You would think there would be some sort of agreement, but instead........disparity.....Just f$&king comical sometimes.........
Rock on
Rock on
Simple $8 plug chaser solved the problem in 15 minutes. What would have happenend if I took it to a random mechanic? Probably somewhere between $50 and $500 for a repair. I would have accepted either without the advice and painful experiences of my Corvette brothers.
Maintaining a corvette is like trying to have a good marriage (IMHO)...luck, hard work, and listening to those who have been there. That advice has gotten me this far.
Last edited by futuretech; 12-28-2009 at 04:23 PM.
12-28-2009, 04:35 PM
#17
Tech Contributor
12-29-2009, 10:34 AM
#19
Melting Slicks
my bolts had a very small amount of loctite already installed on them. this isnt a component that is put under high stress, so its not very critical.
