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Old 01-18-2013, 03:04 AM   #14 (permalink)
bestclimb
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Join Date: Oct 2009
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I have tried this on a very tired engine. It may have helped but I duno. To get carbon off the valves I have hit the rockers on the valve side to knock them around a bit with a heavy rubber mallet. Made a noticeable increase in compression when doing leak-down type tests.
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