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Old 11-16-2012, 08:36 PM
Oldguy48 Oldguy48 is offline
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As a teenager (which was a looong time ago), I was told that running an engine with only the exhaust manifold could result in warped valves, because after you shut it off the valves would cool too quickly. I never really knew if that was true or not. I just remember being told about it. However, I never had a problem with warped valves on any engine.
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