1300k on a rebuild, blowing smoke at high rpms

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Jun 27, 2022

Lone111

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1300k on a rebuild, blowing smoke at high rpms

I've got a 97 civic coupe, d16y8. I did a rebuild on the bottom end, bearings, rings, etc. Haven't had any problems until today. Got off the freeway just fine, started to get into high rpms and noticed a whitish, bluish smoke. No overheating, no.coolant in the oil, no rough idle or loss of power. There is oil residue on the inside of the tail pipe tho. Doesn't smoke at idle. Coolant temp sensor is bad, replacing that today. Any ideas???

Jun 27, 2022

FRSam

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Re: 1300k on a rebuild, blowing smoke at high rpms

Did you do a proper break-in? It sounds like the piston rings didn’t seat properly.

Jun 27, 2022

Lone111

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Re: 1300k on a rebuild, blowing smoke at high rpms

Quote:

Originally Posted by FRSam

Did you do a proper break-in? It sounds like the piston rings didn’t seat properly.

yea did a few heat cycles and kept it under vtech for over the first 500 miles

Jun 27, 2022

Colin42

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Re: 1300k on a rebuild, blowing smoke at high rpms

Rings or valves. If you did the bottom end correctly then it should be the valves. You can rent a leakdown tester and check. Or rent a compression tester and check using that.