LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Anyone did fixed their own intake leak?

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Old Sep 17, 2003 | 03:58 PM
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S.J.S.'s Avatar
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Anyone here fixed their own intake leak?

I'm putting my motor back together and I'm wondering if they did something else with the gasket or used a different one to fix the problem. I had the intake leak once before and they fixed it under the warrantee.

Last edited by S.J.S.; Sep 17, 2003 at 04:18 PM.
Old Sep 17, 2003 | 04:03 PM
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Re: Anyone did fixed their own intake leak?

Originally posted by S.J.S.
I'm putting my motor back together and I'm wondering if they did something else with the gasket or used a different one to fix the problem. I had the intake leak once before and they fixed it under the warrantee.
cut slit into block
match on intake

RTV makes a wall


http://www.worldisround.com/articles/18770/photo62.html
Old Sep 17, 2003 | 04:17 PM
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What does the slit do? Do you lay a bead of silicone in there? Is that how they fix it?
Old Sep 17, 2003 | 04:20 PM
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Originally posted by S.J.S.
What does the slit do? Do you lay a bead of silicone in there? Is that how they fix it?
RTV makes a "wall"

Niether I nor the previous owner of the block had anyintake manifold leaks
Old Sep 17, 2003 | 04:22 PM
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When I put my motor back together I put a nice thick bead on that part of the intake, along with using the gasket. The stuff I used was that gasket maker stuff from permatx that comes in a aerisol type can of a caulk gun style tube. So far after 2000 miles no issues.
Old Sep 17, 2003 | 04:25 PM
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Everything I read says to lay a 1/4 in. bead of that caulk type sealant. Doesn't that crap oooz into the motor?
Old Sep 17, 2003 | 04:28 PM
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I did something similar to what Trey mentioned. I scored the areas of the block and the manifold where the RTV goes with the corner of a file. Basically I made a bunch of deep X's all over the place. It gives the RTV something to 'bite'. Without doing something like this, those areas will still be smooth and there'll be more of a possibilty that the RTV won't stick well and you're back in the same leaky boat.
Old Sep 17, 2003 | 04:31 PM
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Originally posted by S.J.S.
Everything I read says to lay a 1/4 in. bead of that caulk type sealant. Doesn't that crap oooz into the motor?
Not really, it's quite thick. In fact, it takes a fair amt of squeezing to get a steady thick bead going. A 1/4", huh? I believe I used a tad more No leaks, no problems.. did the leak fix many, many moons ago.
Old Sep 17, 2003 | 05:37 PM
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Let the silicone cure for over 24 hours before you fire up the motor. Allows it to cure before oil starts getting thrown around inside.
Old Sep 17, 2003 | 09:15 PM
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Originally posted by SinisterSS
Let the silicone cure for over 24 hours before you fire up the motor. Allows it to cure before oil starts getting thrown around inside.
Yeah thats what the stealership told me they did when they fixed it under warrantee.

Thanks for the input all.
Old Sep 17, 2003 | 09:18 PM
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I thought about "toothing" the rails myself but, damn, I hate to start making fine metal shavings when the intake is off. I just took my chances on having another leak. I'd rather take my chances on having it leak again than having a cam bearing go.
That's just me though.

Jeff D.
Old Sep 17, 2003 | 09:33 PM
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Originally posted by PoorMan
I thought about "toothing" the rails myself but, damn, I hate to start making fine metal shavings when the intake is off. I just took my chances on having another leak. I'd rather take my chances on having it leak again than having a cam bearing go.
That's just me though.
Yeah I thought about that to but I figure I'll do that before I scrub down my block and put it back together.
Old Sep 17, 2003 | 10:52 PM
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I used a punch and dimpled the block surface. Viewable in this pic (not the circled part ).
Old Sep 17, 2003 | 11:22 PM
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I just put a thich line of RTV on the front and back of the intake.... bolted it down to spec, let it sit for 24 hours and so far it's been a year with no leak.
Old Sep 17, 2003 | 11:50 PM
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Same here, I have yet to have a problem with mine



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