SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: BIG JOHNSON on June 02, 2012, 03:24:31 PM

Title: Center rise exhaust gaskets
Post by: BIG JOHNSON on June 02, 2012, 03:24:31 PM
They keep Friggin leaking. Anyone know where to find lead gaskets?

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Title: Re: Center rise exhaust gaskets
Post by: GT Jets on June 02, 2012, 04:49:08 PM
They keep Friggin leaking. Anyone know where to find lead gaskets?

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What manifolds do you have? These rarely if ever leak.

Got any pictures? You may have to have these badboys milled.
Title: Re: Center rise exhaust gaskets
Post by: BIG JOHNSON on June 02, 2012, 07:44:49 PM
Hardin marine if I recall right. I torque them in a criss-cross pattern and tighten the **** out of them.

I machined the riser's surface on a piece of granite with sandpaper duct taped to it. (my cnc table) and I filed the manifolds surface with a file, took forever and a day. With towels shoved in exhaust to keep particles out.

Original owner had silicone gushing out between all surfaces and it was leakin when I bought it. I did my work to it and used aviation gasket sealer on all surfaces. Well, the sealer just bubbled and melted out once it got hot, I re-torqued on the water last Saturday and saw all the water spots all around manifolds when I got home.


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Title: Re: Center rise exhaust gaskets
Post by: GT Jets on June 02, 2012, 10:39:35 PM
Gaskets should be sprayed with spray tack only.....I use silver paint from Rustoleum.

You should not use any sealer with body to it... ;)
Title: Re: Center rise exhaust gaskets
Post by: crewchief22 on June 03, 2012, 07:40:18 AM
Gaskets should be sprayed with spray tack only.....I use silver paint from Rustoleum.


Bringin' out the old school  ;)
Title: Re: Re: Center rise exhaust gaskets
Post by: BIG JOHNSON on June 03, 2012, 01:10:24 PM
also the gasket shouldnt be burning... why is that area getting so hot?  i can touch my entire exhaust with bare hands and its "barely warm" now.

Gaskets aren't burning, the aviation sealant got warm and softened up. I can put my hands on the riser while its running.

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Title: Re: Center rise exhaust gaskets
Post by: BIG JOHNSON on June 11, 2012, 09:30:52 PM
Lead gaskets? Sure, why not.

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