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

Quote from: 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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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: ka0tyk on June 02, 2012, 05:28:52 PM

I cut mine from a sheet of gasket... No leaks here.  You torquing them down right?

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

Quote from: GT Jets on June 02, 2012, 10:39:35 PM

Gaskets should be sprayed with spray tack only.....I use silver paint from Rustoleum.

Bringin' out the old school  ;)

Title: Re: Center rise exhaust gaskets
Post by: ka0tyk on June 03, 2012, 11:40:26 AM

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.

Title: Re: Re: Center rise exhaust gaskets
Post by: BIG JOHNSON on June 03, 2012, 01:10:24 PM

Quote from: ka0tyk on June 03, 2012, 11:40:26 AM

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: ka0tyk on June 03, 2012, 03:30:09 PM

http://www.amazon.com/Mr-Gasket-5961-Exhaust-Material/dp/B000BWAPH0 (http://www.amazon.com/Mr-Gasket-5961-Exhaust-Material/dp/B000BWAPH0)

Little knife and some Dremel trimming and bam... That's what I did for my emi manifolds and risers.

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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