TD Hardcore User!
Join Date: Aug 2004
My Ride: 1992 Dodge Daytona
Engine: 2.5l I-4 super 60
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Re: How many miles to seat rings?
There are too many variables for me to sit here at the computer and guess what could be wrong, but it really does sound like a piston ring issue. I'm guessing the oil rings aren't scraping the oil back down the cylinder. Another thing to consider is how out-of-round were those cylinders? A round piston ring in an oval hole..??? ya never know until its checked.
I've had good luck with marking the position of piston ring gaps, removing/swapping out a piston, and re-using the old rings so that the gap is exactly where it was before. So far, never had a problem. No glaze breaking or anything and it worked perfectly. A couple of the engines I've gone through had some very questionable cylinder walls--pretty beat up actually, and they ran like a million bucks with just a glaze break job and new rings. Even the cheapest person on this forum probably wouldn't have gone with those cylinder walls, but I did it for personal education. It worked awesomely. No abnormal blow-by, great compression, no oil consumption, and lasted me 15,000 miles until I sold it. And I beat the snot out of that thing.
Not good to make this a habit, but as long as the rings are installed correctly, things work well.