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Old 04-08-2012, 05:11 PM
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Default Oil Leaking Through Manifold Bolts

I have a 74 and I keep getting oil around the manifold bolts.
I have tried all kinds of sealants including permatext and teflon sealer.
Even tried replacing the bolts.
Was going to try tape but afraid it my get inside the engine.

Thanks in advance for any input.

4 speed
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Old 04-08-2012, 06:04 PM
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Quote:
Originally Posted by 4 SPEED View Post
I have a 74 and I keep getting oil around the manifold bolts.
I have tried all kinds of sealants including permatext and teflon sealer.
Even tried replacing the bolts.
Was going to try tape but afraid it my get inside the engine.

Thanks in advance for any input.

4 speed
All I have ever done is pull the bolts one at a time, blast GOOD carb cleaner down the holes a bit, blast out with air, then more cleaner then more air, until it is sanitary from any oil, clean the bolt super clean, put a good coating of the GOOD RTV silicone sealer by GE, and snug down the bolt, let dry overnight.....aggravating job...I know....
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Old 04-08-2012, 06:14 PM
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Oil around all the bolts?
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Old 04-08-2012, 07:14 PM
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Quote:
Originally Posted by 4 SPEED View Post
I have a 74 and I keep getting oil around the manifold bolts.
I have tried all kinds of sealants including permatext and teflon sealer.
Even tried replacing the bolts.
Was going to try tape but afraid it my get inside the engine.

Thanks in advance for any input.

4 speed
buy some extra felpro intake gaskets and lay a bolt in a hole and draw around it. Then cut it out and trim and use that as a gasket, that will seal the oil issue.
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Old 04-09-2012, 12:05 PM
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Quote:
Originally Posted by 4 SPEED View Post
I have a 74 and I keep getting oil around the manifold bolts.
I have tried all kinds of sealants including permatext and teflon sealer.
Even tried replacing the bolts.
Was going to try tape but afraid it my get inside the engine.

Thanks in advance for any input.

4 speed
buy some extra felpro intake gaskets and lay a bolt in a hole and draw around it. Then cut it out and trim and use that as a gasket, that will seal the oil issue.
I like this idea and will try it out soon.
Guess I am getting this problem because the gaskets in there now suck?
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Old 04-12-2012, 09:21 PM
Grampy Grampy is offline
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Default don't do it

I would advise against the small gasket under the bolt head. The bolt must stretch (microsopically) to keep a load on the gasket. The gasket seals because it is compressed between the head and mainfold. Putting a soft (gasket material) washer that will , for lack of a better term, squish under the bolt head will let the bolts loosen. The little gasket will see the same bolt clamp load in pounds as the big gasket.

It may be more work but Gene's method will give you clean surfaces that the sealer will seal.

Grampy
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Old 04-13-2012, 07:52 AM
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I find that rather odd.

Maybe a question before I answer. Were the bolts zinc plated and are they corroding ?
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Old 04-15-2012, 01:35 PM
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I find that rather odd.

Maybe a question before I answer. Were the bolts zinc plated and are they corroding ?
Bolts are SS and brand new.
I have tried all kinds of sealants with no luck.
I probably will use gumout to clean threads in manifold but I am worried about getting it into my oil.
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Old 04-15-2012, 03:29 PM
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The secret is to get the threaded holes and bolts completely oil free.
You can use a lot if Starter fluid without worry because it will dry completely without residue. You can always use a gun barrel bore brush if you want to really scrub the threads.
Silicone works for me.
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  #10  
Old 04-15-2012, 09:46 PM
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Sounds good to me.
What type of silicone do you use that will hold up to engine temp?
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