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Power Strokes
6.4 Aftermarket
Upcoming Head Gasket replacement
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[QUOTE="kleake, post: 1400026, member: 25987"] Valve stem height is supposed to be set from spring seat surface on the casting, to the tip of the valve stem. If it was set after the seal was installed, the stem height would be the thickness of that seal too high. If the stem is too tall, the lifter can't take up that much slack and bottoms out, holding the valve open. Per factory spec, the stem height should be 2.300-2.320. Say the seal is .250 thick (guessing) then the stem height would be around 2.550. I hope that makes sense, I'm pretty confused myself on this mess. Sent from my SM-G935R4 using Tapatalk [/QUOTE]
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