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Re: Ring Job: always a good thing???...(more long) (archive)
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Posted by Andrej Gaspari on April 09, 2000 at 22:31:20:

In Reply to: Ring Job: always a good thing???...(more long) posted by Jonathan T. on April 09, 2000 at 22:10:45:

Those are some pretty unpleasant numbers, but I wouldn't panic just yet. First off, I hope the test was performed with the engine hot and the throttle wide open. Second, if the engine sat for a while before you got it, the rings may be sticking. I've heard all sorts of things to try and remedy this condition, and I haven't tried any of them, so use at your own risk. The one that comes to mind and doesn't sound too risky is to put some Marvel's Mystery Oil in the cylinders and dump the rest of the quart into the oil. This may break the rings loose by dissolving any corrosion in there.

Above all, if the car runs well and you're going to build a motor fairly soon, I wouldn't dump too much into this one.

: Hello all,
: Once again i'm frustrated and perplexed. The used engine I swapped in this january is running well. Just the usuall valve guide business, so I thought I'd see about fixing that and maybe put a regrind cam in at the same time. I'm planning to rebuild the original engine next year so I don't want to go nuts, but I digress. Before doing any head work I thought I'd check the compression to verify the bottom end. As you probably guessed results were less than optimal. In retrospect I'm amazed the motor runs as well as it does. My mechanic suggests a ring job in addition to the head work.

: Question: this is an old engine with 100k miles, is there a chance that the rings will not seat against the bores? Should I just keep driving and hope things hold up for another 30k miles. The numbers were 130,60,95,60 dry. 160,120,110,95 wet (pretty miserable eh). Is ther a way to fix things a bit for now without a full rebuild? I don't want to do a halfassed job but I don't have the cash for the real deal right now (3-4 grand). Any thoughts on the life expectancy of an engine with these #'s? Any thoughts on the risk/predictibility of new rings on a 100k motor? Car is my daily driver 90 miles/day.

: Thanks for all replies,

: Jonathan T.
: '76 (having a nice weekend)



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