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Gasket sealer for Exhaust Manifolds.

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Old 11-10-2002, 06:58 AM
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Default Gasket sealer for Exhaust Manifolds.

My merc manifolds show a little sign of weeping on the outside which means it is or will be doing it on the inside - I miss my Gils. Anyway, going to yank them and put new gaskets in. Should I use a sealant with the gaskets and if so what kind of permatex? Also, anyone know the torque specs?

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Old 11-10-2002, 08:22 AM
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Per the Merc service manual, the torque spec for the manifolds and risers 25 lb-ft. Be sure to use Merc OEM gaskets !! They are to be installed dry (no sealant).
 
Old 11-10-2002, 02:50 PM
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Cool

I use a Permatex product called "Hylomar"
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Old 11-11-2002, 11:00 AM
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If the sealing flange is pitted from rust/corrosion you may need to have the manifolds surfaced to keep them from leaking. You can surface them yourself if you have access to a large belt sander or take them to a machine shop.
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Old 11-11-2002, 11:07 AM
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thanx guys, my friend also used a permatex product that was sprayed on the gasket. I don't think pitting is a problem, it's a 96.
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