Thermostat Housing Installation

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Jan 30, 2007 | 12:46 PM

DO2G

Thread Starter

Pro

Joined: Dec 2004

Posts: 534

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From: Connecticut

Thermostat Housing Installation

Is any type of sealant (RTV) required around the gasket of the thermostat housing? If so, which side of the gasket or both?

Thank you

Jan 30, 2007 | 01:02 PM

redvetracr

Race Director

Joined: Aug 1999

Posts: 18,126

Likes: 174

From: WI

you really shouldn`t need it with a gasket but a little RTV can`t hurt..

...redvetracr

Jan 30, 2007 | 01:21 PM

PRNDL

Team Owner

Joined: Jul 1999

Posts: 26,545

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From: Huntersville NC

If you have the stock housing and use the paper gasket, I believe those paper gaskets come with instructions to coat both sides of the gasket and let it sit for a few minutes to dry before using. I think I used blue.

Jan 30, 2007 | 02:40 PM

JoeRags

Melting Slicks

Joined: May 2003

Posts: 2,387

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From: Meriden CT

I dont use any and dont have any leaks... my thermo housing has come off plenty of times... I just toss in a new gasket and I'm good to go.

Guess it cant hurt though.

Jan 30, 2007 | 10:44 PM

MidShark

Melting Slicks

Joined: Dec 2002

Posts: 2,390

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From: Belmont Michigan

Like it was stated, you really don't have to use any, but if the housing or manifold mating surface is pitted at all, it is a good idea.

Rich

Jan 30, 2007 | 10:48 PM

Big2Bird

Le Mans Master

Joined: Dec 2006

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Quote:

Originally Posted by Grayson

Is any type of sealant (RTV) required around the gasket of the thermostat housing? If so, which side of the gasket or both?

Thank you

The only gasket that you should not use sealer on is the $10.00 Felpro silcone one. It is made for multiple uses.

Jan 31, 2007 | 08:49 AM

Vette Gator

Burning Brakes

Joined: Dec 2004

Posts: 918

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From: Gainesville FL

I was taught to put a small bead of black silicone sealer around the gasket, then work it between my thumb and finger to leave a thin coat all the way around both sides. I've used this method on my transmission pan, valve covers, T-stat housing, etc, and never had any leaks.

Jan 31, 2007 | 09:10 AM

CJ 77

Racer

Joined: Jan 2007

Posts: 334

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From: York PA

77/350- I used an RTV product but It was not silicon based. Think it was a brown color though. Only used it because the housing surfaces were pitted. Silicon molecules are there forever. Nice today but what about tomorrow? I live near the Harley Davidson plant. Harley BANS any piece of equipment that uses a silicon based product for that reason. The molecules are everywhere forever and their paint wont adhear as well. I thought that was crap until we sold them a piece of equipment and then had to rip it out. That was a number of years ago but I dont think the philisophy has changed.
chuck