LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Fixing rear intake oil leak

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Old 03-06-2010, 09:36 AM
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Default Fixing rear intake oil leak

I know, i know this is not a new post subject but bare with me it got a good question in it.

We all know that LTX based cars are prone to leak oil from the back of the intake.I probably did mine to quickly or maybe it was still oily a bit when i put my RTV.So im about to do it again but i would like to do it correctly.

Simple question:
Its written everywhere to install the intake within 5 mins after the application of the RTV wich is ok with me;

but...

What do i do after that:

-Do i make the entire torque sequence and after wait the 24hours like stated in all manual ?

or

-Do i just begin to thighten the bolts by hand ,stops when the rtv begin to be crush a little and wait 1 hour then do the full torquing sequence and wait for the 24hours(ive read this method a couple of time...)

Thanks a lot,just trying to do it correctly once and for all
Old 03-06-2010, 09:45 AM
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Torque it to spec in sequence immediately after setting the intake down. You don't want the RTV setting up and hardening when it hasn't completely compressed.
Old 03-06-2010, 09:48 AM
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let the RTV sit for 5 miutes, set it in place, torque it down. Then Let it sit overnight.
Old 03-06-2010, 09:53 AM
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Originally Posted by RamAir95TA
Torque it to spec in sequence immediately after setting the intake down. You don't want the RTV setting up and hardening when it hasn't completely compressed.
Ok so the 1hour waiting is a big no no.

Originally Posted by Badazz 97 TA
let the RTV sit for 5 miutes, set it in place, torque it down. Then Let it sit overnight.
You mean put the RTV(i use ultra cooper),wait 5 mins then slap the intake on and torque it down.

And yeah it will sit 1,2 or maybe 3 nights,i dont wanna do it again and again
Old 03-06-2010, 09:55 AM
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Apply RTV, set manifold, torque to spec/sequence, wait at least overnight, drive.
Old 03-06-2010, 01:48 PM
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IMO, It really doesn't matter if it's immediate or 5 minutes. The key is to let it cure. Don't start the engine to let it cure. That will only spray oil all over the fresh sealant and cause you problems. Another thing to completely ignore are those who tell you to somehow deface the block sealing surface by either "scuffing" or "dimpling." It's horse ****. Don't listen to them. The block surface is porous enough for sealant to adhere.
Old 03-06-2010, 03:47 PM
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i use permatex right stuff. quite a bit more expensive but WAY better than regular rtv sealant. and they say it will be set up enough to start and drive by time you get done reassymbling everything. I wouldn't go that far though i'd still let it cure over night. runs about 20 bucks a tube.
Old 03-07-2010, 02:12 PM
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Originally Posted by SS RRR
IMO, It really doesn't matter if it's immediate or 5 minutes. The key is to let it cure. Don't start the engine to let it cure. That will only spray oil all over the fresh sealant and cause you problems. Another thing to completely ignore are those who tell you to somehow deface the block sealing surface by either "scuffing" or "dimpling." It's horse ****. Don't listen to them. The block surface is porous enough for sealant to adhere.
Seriously. Dimpling the china wall won't help a bit. Good call.



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