Continental O-300A on a Cessna 172

Continental O-300A on a Cessna 172

Has anyone ever seen an oil leak on the push rod tubes where the go into the cylinder. I have heard of leaks on the base side with the rubber boot where it goes into the block, but what about on the other side. Anyone have any advice. Do I have to replace the cylinder if I want to stop the leak?

BobD
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Re: Continental O-300A on a Cessna 172

The O-300 is a great, smooth and reliable engine but it does tend to weep oil from the push rod tubes.  From both ends.. If it is leaking from the top end at the cylinder, there is a reaming tool that will expand the inside of the tube to create a tighter clearance between the tube and cylinder.  Just becareful not to ream to much and crack the cylinder.  I have used it and it works.  I don't remember where I got it but I would start with Aircraft Spruce.

346pak
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