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Old 02-18-2007, 07:55 PM
Deerskin Deerskin is offline
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Join Date: Jul 2006
Location: Sedalia, CO
Posts: 13
Default We're pulling the head for sure

What Matt didn't mention is the intake valves on #5 and #6 cylinders won't return to a fully seated position. This assumes that all intake valves and retainer components are nearly the same dimensionally. When measuring the distance from the retainer to the the head casting on all fully closed intake valves and comparing to the same measurements taken on #5 and #6, there is a difference of approximately 0.15". This is approximately the same gap between the rocker arm and tappet (or rocker arm and pushrod seat) seen in the photos. What could be holding those two valves open? I'm not sure of the head configuration but how about loose valve seats? I've seen this on a small engine, don't know if the head has replaceable valve seats.
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