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Old 07-30-2020, 09:06 AM   #3
Will N
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Join Date: Jul 2010
Location: Pennsylvania
Posts: 1,101
Default Re: Manifold Gland Rings

Over time, the rear of the exhaust manifold tends to droop downward due to the weight of the muffler pulling down on it while the manifold is near red-hot. The holes in the manifold and the exhaust ports in the block get out of alignment, and you can't use the gland rings any longer. It seems to work ok with just the gasket if you have the manifolds faces trued up with a mill.
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