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I thought the rehone was to add friction to allow the rings to seat, but I don't know much about engines. I used to have a 1995 Geo Prizm(Toyota Corolla rebadge) with a Toyota 7AFE engine (1.8l) that burned about 1/2 quart every 1000 miles when I got it with 140k miles. At 200k miles I was on a cross country trip from Minnesota to San Francisco, CA and I was putting in 1/2 quart of oil every gas tank and it burned more oil when things were hot and at interstate speeds. I thought of dropping the oil pan and putting new rings on the pistons as a sort of hobo-rebuild because the rest of the engine was in great shape apart from what was likely worn rings. The reason I didn't was that I didn't want to hone from the bottom and not be able to get everything cleaned out. ..long story short, I didn't do it and around 230k miles, the blowby gasses was more than the PCV system could breathe and I had pushed out a camshaft seal on an out-of-state trip. I took care of the seal and it happened again in about 10k miles. Nearly 1/4 million miles, I sold the car for cheap to someone who needed a cheap car. Would a easy/hobo rering job from the bottom without a hone possibly have kept that engine in service?
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