Quote:
Originally Posted by James
Our engine is a non-interference engine (with either valve fully open it will not touch the piston). If the engine had ever had old gas in it while the engine was running will cause the intake valve(s) to stick. I would pull the valve covers and the rocker arm assemblies. Then rotate the engine by hand. If it turn, then a valve job is in order. If you have the same problem then it something in the cylinder(s).
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Not all engines are non interference engines. If one is uncertain about their engine being non interference as opposed to an interference designed engine, it is better to err on the side of caution than to create more problems than there already are.