Idling trouble... I'm miffed.

[classicauto]

Originally Posted by vex

alright, the smoke is starting to concern me. Intermittently (more accurately after I come from a 60mph cruise at 2.5k) I see smoke when I stop and idle. The sheer volume of smoke is what is concerning me. The oil level itself is not affected all that much by the volume of smoke it looks like, but it does cause me to think it an odd occurrence and would like to remedy the problem as soon as possible. Could the smoke be caused by the oil control rings not being completely worn in yet (though, that would not make any sense since the oil control rings were installed on the same locations on the rotor they were pulled from).

You're 100% positive that when you put the o-rings in the "scrapers", that none were nicked, twisted or otherwise? Were there any flat edges on the orings? Older ones tend to flatten on their sealing surface, and when torn down are basically impossible to get sealing properly again.....even if they were before.

EDIT: how many miles were on the re-used orings?

Originally Posted by vex

Thinking more acutely a possibility is that the used rear iron I installed, and the old oil control rings have not completely worn to each other yet causing slight portions of oil at the increased oil pressure to squeeze by and thereby causing the smoke.

A used iron, and BRAND NEW ring and o-ring shouldn't smoke a peep at all. I've never noted any break in period for them before, but I always use new orings (or super-low-mileage-after-popped-seal-ones) The o-ring does more sealing then the scraper really with regards to crankcase oil getting out into the combustion chamber.

Originally Posted by vex

The only other possibility would be that the oil injectors are working overtime and dump in too much oil because of increased oil pressure and no check valve installed to avoid positive pressure on the vacuum lines.

Thoughts?

Increasing the crankcase oil pressure will have zero bearing on what the oil injector nozzles see......unless I misunderstood you there. So that won't be the problem.

[vex]

Originally Posted by classicauto

You're 100% positive that when you put the o-rings in the "scrapers", that none were nicked, twisted or otherwise? Were there any flat edges on the orings? Older ones tend to flatten on their sealing surface, and when torn down are basically impossible to get sealing properly again.....even if they were before.

EDIT: how many miles were on the re-used orings?

Yes, I'm sure none were nicked, scrapped or flattened. They were new viton oil rings.

A used iron, and BRAND NEW ring and o-ring shouldn't smoke a peep at all. I've never noted any break in period for them before, but I always use new orings (or super-low-mileage-after-popped-seal-ones) The o-ring does more sealing then the scraper really with regards to crankcase oil getting out into the combustion chamber.

That's what I thought. The oil rings themselves were brand new without defect and installed with lots of oil on them to keep them that way. I find it hard to believe that the oil control rings could go bad only sometimes.

Increasing the crankcase oil pressure will have zero bearing on what the oil injector nozzles see......unless I misunderstood you there. So that won't be the problem.

You misunderstand. I've turbo charged my naturally aspirated engine. Would installing a check valve on the air line that leads to the oil injectors remedy this problem or even pose a problem in the first place?