Reinstalling heads/exhaust

legendlc
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Reinstalling heads/exhaust

Postby legendlc » Mon Sep 16, 2019 9:10 am

Head finally came back from machine shop now it's time to start re-installing everything. Any tips/tricks out there? Would love to hear them if so. I have exhaust system fully disassembled down to the end caps on the logs. Newly rebuilt head that had to have valves reseated and one totally replaced and everything clearanced.
1978 37 Double Cabin
Lake Cumberland KY

ddependo
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Re: Reinstalling heads/exhaust

Postby ddependo » Mon Sep 16, 2019 12:07 pm

I find it helpful to get the studs to hold the manifold and gaskets in clace. I also use a long bolt with the head cut off to hold the exhaust hose in place to get the bolts started. Go back and re torque when it has been run.
my 2 cents
Wayne
1973 32 express fly bridge
Chattanooga
"Southern Lady"

Fastjeff
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Re: Reinstalling heads/exhaust

Postby Fastjeff » Tue Sep 17, 2019 5:40 pm

1. Use the best damn head gaskets you can find!

2. Put a LIGHT coat of silicone on both sides of every exhaust manifold/ riser/ etc. gasket.

3. As Wayne said, retorque the head bolts after the motor is up to temperature.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

legendlc
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Re: Reinstalling heads/exhaust

Postby legendlc » Tue Sep 17, 2019 6:35 pm

Jeff, any recommendations on head gaskets? I have a fel-pro PermaTorque blue stripe to go back on but can change that easily as I won't start on the head for a few days.
1978 37 Double Cabin
Lake Cumberland KY

Fastjeff
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Re: Reinstalling heads/exhaust

Postby Fastjeff » Wed Sep 18, 2019 7:00 am

Good choice.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

legendlc
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Re: Reinstalling heads/exhaust

Postby legendlc » Fri Sep 20, 2019 9:53 am

Jeff, would you put silicone on head gasket? If I remember correctly the parts guy said to not use any on it?
1978 37 Double Cabin
Lake Cumberland KY

Fastjeff
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Re: Reinstalling heads/exhaust

Postby Fastjeff » Fri Sep 20, 2019 12:36 pm

A thin smear of it around the water passages won't bother a thing.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

legendlc
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Re: Reinstalling heads/exhaust

Postby legendlc » Fri Sep 20, 2019 9:45 pm

Much appreciated sir.
1978 37 Double Cabin
Lake Cumberland KY

Difrenzi
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Re: Reinstalling heads/exhaust

Postby Difrenzi » Tue Apr 14, 2020 10:36 pm

I’m looking into a possible blown head gasket on a 1977 318 28’ fly ridge. The motor has 1,800 hours. My question is with this many miles does it make sense to repair and replace only the upper half of the engine. Any advice will be appreciated.
Boat is in eastern Kentucky. Cave Run Lake.

Fastjeff
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Re: Reinstalling heads/exhaust

Postby Fastjeff » Wed Apr 15, 2020 6:57 am

It depends on how much damage the break in the gasket did to the BLOCK. obviously, the head can be replaced without hauling the motor out, but if the gasket break "fire gouged" the block you're screwed.

That happened to me. Ran less than a half hour at cruising speed and the damage was done.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington