Onan ccka engine

SVcummins · Nov 6, 2020

Whet shoild my compression numbers be ? 75 on the left 50 on the right . Right hole isn’t firing

super99 · Nov 6, 2020

I don't know what it should be, but it sounds awful low to me. I thought you had to have 100#s or better in order to fire. I'll wait to see what the experts have to say.

caterpillar guy · Nov 6, 2020

We had an old chevy truck one time had 20-50 with 1 at about 80 that ran and would pull a load was doggie. That was the turning point for me and GM. Put rings and shimmed the poured rod bearings. Got a whole whopping 15 PSI oil pressure with the oil dippers on the rod caps ran it one time and got hot and that was the end of that. Fan belt broke. Was long time ago and don't remember whether it was a new belt or just was a good looking belt. Never had any interest in GM since. They did make good wagons though. Put a tongue in them and would carry a good load.

Billy Shafer · Nov 6, 2020

Compression should be 100-120 PSI. This comes from the factory spec book

David G · Nov 6, 2020

That would have been in the 50s.

SVcummins · Nov 6, 2020

Thank you

SVcummins · Nov 6, 2020

I figured it was low but wanted to see what the numbers actually was

thehickdaddy · Nov 6, 2020

Must be the 50s yes.
Family's 1951 chevy flatbed has 216 engine with dippers.
Has been overhauled a time or two I think but still gets the job done

Onan ccka engine

SVcummins

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super99

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caterpillar guy

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Billy Shafer

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David G

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SVcummins

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SVcummins

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thehickdaddy

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