Questions for engine experts

I know, leave well enough alone is proly the smart thing to do, but I hate cars that smoke. This motor uses next to no oil, runs great, and up untill a week or so , never smoked. I think I'll do a compression test, the spark plugs look good, all grey in colour. Might try an oil change,...could be oil leaking past the valve guides.

Dave Eddie
 
Check the compression tonight, low cyl is 60, high cylinder is 68, which doesn't seem terribly bad. Also did an oil change and went to a slightly heavier oil 15w-40.
Same result,...still smoking at gear changes. I think when time permits (probably this winter) I will pull the pistons and replace the rings,....sounds to me like an issue with the oil rings.

Dave
 
Yikes!!!!!
just like that?

why not a dry-wet test?
if the readings don't increase wet then the rings are fine.
Suppose the valve guides are worn and you are sucking up oil around the intake
stems

Your readings are respectable. if the compression rings are holding compression why would the oil rings be all worn out .

more diagnostics are needed before you take the plunge
 
If you pull the spark plugs and look at the tops of the pistons, those with worn rings and burning oil usually have clean edges around the top of the pistons.

I bought a NOS set of rings the other day for my 1950 Studebaker Commander, and the instruction sheet said the rings are fast seating and don't require cylinder honing.
I've seen that statement for some of the newer ring sets, but didn't know it went back to the 50's, which is when these rings appear to be made.
 
I just started two cars that have been setting for a while. I shut them done by putting oil in the carb. They smoked like crazy, never did stop smoking.
If I was you I would drive them and see what happens.
 
Patrick L. said:
Its kind of a pain when folks don't follow up with a result isn't it.
Click to expand...

I wouldn't be too quick to criticize the guy. Maybe he had a serious health problem and couldn't continue with his car. Or a family crisis. Sometimes life gets in the way of our plans.

And I don't mean to be taking you to task, Patrick L. I'm just reflecting on some possibilities for his absence. We're just an internet community and seldom know what's otherwise going on with guys here.
 

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