davidb56
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Blowby usually is from the rings not seating/broken in yet on a rebuild. Are you getting some blue smoke out the exhaust? Id be more concerned with the temp. it seems like a stuck thermostat. Also check the radiator for exhaust gases. you can get a kit from the auto parts store or watch for bubbles (not the stripper) in the radiator with the cap off and running. I had to replace my temp sender on my truck as it always showed cold, now it comes up to temp at 180F.
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