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Old 03-07-2010, 09:47 PM
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2door 2door is offline
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Join Date: Sep 2008
Location: Littleton, Colorado
Posts: 16,224
Default Re: Missing my top piston ring retaining pin!

I just today disassembled a warranty return engine from one of our sponsors. The customer said the engine was seized and would not turn. This was a new 2 stroke engine that had never been run. I found the top ring gap was not aligned with the retaining pin but had been jambed into the cylinder. If the ring gaps are not aligned with the pins you have a 'high spot' in the ring that can damage the cylinder walls and piston. Thankfully the customer did not try to force the engine to turn but simply returned it for a new one. This one was lucky and will live to run again.
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