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Exhaust manifold gaskets


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I was doing some preventive maint and decided to to change the riser and exhaust manifold gaskets on my Indmar Monsoon 335. When I took off the manifolds I was surprised that there is no gasket between the manifold and the engine block. It only had silicone. I bought the gaskets and am debating to put it back with silicone or to use the gaskets. Recommendations?

Thanks

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Plus1.gif I have learned through the years that exhaust manifold gaskets just blow and THE BEST thing you can do is NOT to use them.

Just take them back and pick up a 12 pack on the way home Biggrin.gif

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Indmar recommends just using a high temp RTV silicone like this: http://www.bakesonline.com/detail.aspx?ID=1559 Mercruiser has a lot issues with exhaust manifold gasket leaks. I've heard a lot of their motors come in sounding like a VW bus in the shop.

You should be able to pick it up at any local auto parts store too.

Can i ask why you pulled the manifolds off anyways? Are you running in salt or brackish water?

-Paul

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Indmar recommends just using a high temp RTV silicone like this: http://www.bakesonline.com/detail.aspx?ID=1559 Mercruiser has a lot issues with exhaust manifold gasket leaks. I've heard a lot of their motors come in sounding like a VW bus in the shop.

You should be able to pick it up at any local auto parts store too.

Can i ask why you pulled the manifolds off anyways? Are you running in salt or brackish water?

-Paul

I was replacing the riser gaskets and at the time did not know the manifolds did not have gaskets. I had bought the gaskets and was surprised when there was no gasket between the manifold and head. I run the boat in brackish water and flush it after every use. I found rust on the surface but nothing I would consider problematic. Seen the site before looks, very useful. That is exactly what I used to put it back together. Thanks.

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