coolant leak - Team Camaro Tech
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post #1 of 11 (permalink) Old Jul 21st, 03, 10:18 AM Thread Starter
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I have a small but presistant coolant leak at the intake manifold where the thermostate is. I always seem to have a small puddle of coolant on the intake. I'v noticed the guy I bought the car from not only installed a gasket but has a generous amount of sealant also applied. Someone told me this is a comon leak problem. Does anyone else have this as a problem? Any suggestions or tricks before I take it off and put a new gasket on?
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post #2 of 11 (permalink) Old Jul 21st, 03, 10:50 AM
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Some do, some don't. It doesn't need to be a problem... Both surfaces need to be clean and flat. Then get a housing gasket with the blue ring built into it (chevy dealer or corvette or camaro shop) Get a cast thermostat housing (stay away from chrome) paint it with an alumablast or chev orange color to match your intake and bolt it up without any sealer at all...

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post #3 of 11 (permalink) Old Jul 21st, 03, 10:54 AM Thread Starter
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OK, I have the cast thermostate housing already. I will get the gasket with the built in blue ring. Hopefully that will do it, don't like the idea of any sealant being used. THANKS!
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post #4 of 11 (permalink) Old Jul 21st, 03, 11:31 AM
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What I use is the regular paper gasket. Straighten the cast housing by wet sanding (around 400 grit) it on a piece of glass. This will level the housing. Then take permatex non-hardening gasket sealer and put a THIN coating on both sides of the gasket (or metal, doesn't matter, just get sealant on both mating surfaces!) I just evenly smear the sealant with my finger until just a coating remains. Then tighten. A very little amount of sealer oozes out. This has not failed me yet! [img]smile.gif[/img]

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post #5 of 11 (permalink) Old Jul 21st, 03, 11:33 AM
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I use the plastic gasket with rubber o ring built into bottom/top. Available at autozone.com !! BTW, its installed DRY, no sealant AT ALL!!

FELPRO 35562T for $4.29 Autozone

Felpro 35562 website link

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post #6 of 11 (permalink) Old Jul 21st, 03, 11:59 AM
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Just follow the great info in all three of the replies!

1.) Use a good Cast Housing.
2.) Make sure it is reasonably flat by trueing on a piece of 1/4" glass or surface plate.
3.) Use the new FelPro gaskets!
These 'Printed-Seal' type gaskets are the $hits for Intake and Thermostat applications! Fords have a bad leak problem with their cheap cast aluminum housings and these gaskets work perfect for them too.
Now if they'd only make them for Water Pumps...

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post #7 of 11 (permalink) Old Jul 21st, 03, 12:22 PM
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I know what you mean about gasket sealer. Many people over do it by putting it everywhere. The thermostat housing is one of the few places I put sealant. I usually use the yellow gorilla snot (I think it's actually a 3m product). It's almost like rubber cement. Stays sticky. Maybe what Kevin was talking about.

-dnult

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post #8 of 11 (permalink) Old Jul 22nd, 03, 12:55 AM
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I think he meant Permatex #2 non-hardening sealer. Good stuff, along with Permatex #3.
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post #9 of 11 (permalink) Old Jul 22nd, 03, 06:14 AM
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Right, permatex #2. It's too much trouble to chase down all the fancy stuff, when the old fashioned paper one is included in the kits and the permatex is right in the top drawer [img]smile.gif[/img]

Either solution will work, just make sure your housing is not warped.

I too am saddened by the "goop blue RTV everywhere" people. But it does have it's uses. Just use the correct sealer for the application and use it sparingly. Too much is never the answer

Kevin

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post #10 of 11 (permalink) Old Jul 22nd, 03, 06:18 AM
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"Too much is never the answer" - except when you find out how much that NOS part you really need is! [img]graemlins/waving.gif[/img]

I only use the 'Blue goop' on our Blue oval cars. The others get the "good" stuff!

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post #11 of 11 (permalink) Old Jul 23rd, 03, 01:33 AM Thread Starter
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WOW so much good advice. I will check for straightness and sand if necessary, then use the gasket with the blue ring. Hopefully this will do it, if not then the goop will come out. THANKS ALL!
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