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Pony compression...

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Stan

12-20-2002 15:07:59

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Compression test on Continental N62 Pony engine gave 90psi on #1 and #4, and 65psi on #2 and #3 cylinders. What should "new" compression be? After a squirt of oil in #2 and #3, both read 90psi. I'm pretty sure this is telling me the rings are worn. Why on the two middle cylinders? Why the same amount of wear on these two? Any other possibilities? Maybe head gasket leak between the two cylinders? Could the oil seal a gasket leak during compression test? Is 65psi pretty bad, as in rebuild is necessary? Seems like a world of knowledge on this site, and I'm hopin' to get me a little of it!

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Jason

12-22-2002 10:44:47

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Re: Pony compression... in reply to Stan, 12-20-2002 15:07:59

65 doesn't sound all that bad when your talking about such a small enegine even if it was in all of the cylinders. I can't give you a reason on why it is those two cylinders,but as long as the tractor runs good and isn't getting water in the oil I wouldn't worry about it at all. Putting oil in the cylinders of any engine will boost the compression. If it were a blown head gasket I wouldn't think that the two cylinders would have the same amont of compression. The only thing i could think of next would be a valve problem. Hope this helps. If you need any help fill free to ask. I restored a Pony a while back. Happy Holiday!

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Stan

12-22-2002 16:15:13

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Re: Re: Pony compression... in reply to Jason, 12-22-2002 10:44:47

Thanks Jason. I thought maybe, since the two cylinders are the same, the head gasket might be partially blown between the two cylinders? No water and oil mixing, but I'm thinking about making this my FIRST attempt at a restoration! I found parts at Continental, and I'm waiting to save up a grand or so! What do you recommend on the crank? Get it turned, or get a new one at $425? I was thinking about a new one, so I could use standard rod and main bearings. I don't know if this is a big deal or not. I'm thinking about 60 over pistons, to give me plenty of clean-up room on the bore. Good idea? Anyway, thanks again for your help, and have a very good holiday!

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