Intake Oil Leak
Thread Starter
Intermediate
Joined: Dec 2001
Posts: 42
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From: Swiftwater PA
Intake Oil Leak
I have an oil leak that is coming from the rear of the intake manifold. I have a new set of gaskets and was wondering if anyone could tell me the the torque sequence for reinstalling the intake. I believe that the torque setting is supposed to be 35 ftlbs. Any help would be appreciated.
thanks
thanks
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by stockred96
I have an oil leak that is coming from the rear of the intake manifold. I have a new set of gaskets and was wondering if anyone could tell me the the torque sequence for reinstalling the intake. I believe that the torque setting is supposed to be 35 ftlbs. Any help would be appreciated.
thanks
thanks
In the past it was start in the middle, criss-cross side to side and front to back, BUT the 86 is different.
So, for your year, I can't say, but I'd definitely get my hands on the GM Shop Manual for your year and check just to be sure.
Another point: I found that the brake bleeding sequence is different on Vettes, too and it differs by the YEAR OF THE CAR. It's NOT the old, "start with the caliper farthest from the master cylinder" way.
Jake
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by stockred96
I have an oil leak that is coming from the rear of the intake manifold. I have a new set of gaskets and was wondering if anyone could tell me the the torque sequence for reinstalling the intake. I believe that the torque setting is supposed to be 35 ftlbs. Any help would be appreciated.
thanks
thanks
From 'tempest' , I got the correct bolt sequence:
what is most important is the tightening order:
driver's side
--------------------
12 11 4 1 5 6
-----------------------> front
10 9 3 2 7 8
--------------------
passenger side
Check out my original thread for more details below:
http://forums.corvetteforum.com/show...3&page=2&pp=20
Good luck....it's not a hard job, but requires some patience...
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by 85vet
Just another quark - if you have aluminum heads 35lbs is a bit too high. At 35lbs you could strip the threads. You might want to go with 25 to 30lbs.
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Racer
Joined: Nov 2002
Posts: 478
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From: langhorne
My Chilton book says for 93-96 tighten to 35 lbs. in three stages: in sequence mentioned above by mikec4. step one 71 in. lbs. step two 19 ft. lbs. step three 35 ft. lbs 
Throttle body gets 18 ft. lbs.
Throttle body gets 18 ft. lbs.
Last edited by Gar; Mar 15, 2005 at 08:07 PM.
whoops, I thought he was talking about torque specs for the head bolts......my apologies! 
Melting Slicks
Joined: Oct 2000
Posts: 3,426
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From: Heidelberg PA
Cruise-In V Veteran
Originally Posted by MikeC4
he asked for intake manifold torque specification...what do the heads have to do with this?
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
I use 35# on my Edelbrock aluminum heads, but I pull them down in a more steps, five # increments.
I then let the setup sit for a few hours and go back over all of them again. I've found that the gaskets I use - Ultra-Seals, compress a tad and when I re-check the torque, I find it's dropped several pounds.
I then let it sit more and continue to re-check and re-torque until they all hold 35#. I've found this procedure to be a LOT easier than having to remove the top end stuff to re-torque them down the road.
Over the years I've had more than my fair share of intake manifold leaks so I've become **** about sealing it.
Jake
I then let the setup sit for a few hours and go back over all of them again. I've found that the gaskets I use - Ultra-Seals, compress a tad and when I re-check the torque, I find it's dropped several pounds.
I then let it sit more and continue to re-check and re-torque until they all hold 35#. I've found this procedure to be a LOT easier than having to remove the top end stuff to re-torque them down the road.
Over the years I've had more than my fair share of intake manifold leaks so I've become **** about sealing it.
Jake
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Originally Posted by 85vet
Just another quark - if you have aluminum heads 35lbs is a bit too high. At 35lbs you could strip the threads. You might want to go with 25 to 30lbs.
