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Forums->Hot Heads Tech Talk->Re: 392 exhaust valve stem seals

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Re: 392 exhaust valve stem seals


Steve: Many years ago, I let a machinist that I trusted talk me into exhaust seals for my hemi. The end result was a galled guide and a galled valve stem.
I'll never do that again. On our race engines we also drill a hole in the intake side of the exhaust guides close to the bottom for additional oiling.
I hope this helps, Bob




> I'm using positive valve stem seals on my intake valves, but unsure about the exhaust valves. Umbrella or no seal at all? I seem to remember that it's best not to run any seal on the exhaust valve, but not sure. What has everyone used on the exhaust side?
> Steve
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on: Mon 18 of Feb, 2019 [16:36 UTC] reads: 221

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