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Oil in rear intake runner

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Old Jul 27, 2004 | 07:59 PM
  #1  
bthomas16's Avatar
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Oil in rear intake runner

The engine is newly rebuilt and has approx. 30 miles on it. I am experincing a ton of white/greyish smoke out the exhaust and also only about 7 psi of oil pressure on the stock oil guage.

The rear intake runner (closest to the tranny/underneath the secondary injector) on the LIM has a lot of oil looking buildup, while all of the other intake runners look clean. The ENTIRE runner is full of the oil substance. Enough such that there is even a black film covering the injector. I have fully spec'ed the fuel injectors and they are fine. I am next going to check the oil nozzle to see if it is faulty(Could this even cause this???).

Does anyone have any information on what could be the problem? I am hoping the side and corner seals are good, but maybe the rebuild was crap (Atkins Rotary)???

Thanks.
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Old Jul 27, 2004 | 10:15 PM
  #2  
zkeller's Avatar
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From: york, PA
Sounds like an oil control ring issue. They may have pinched the rubber ring, forget the oil ring spring, the rubber all together?? Anything is possible. What may be happening is at idle oil is being sucked into the intake, thus, it is building up there. When you rev it the oil is being sucked into the combustion chamber.


Take the UIM off and try pushing a q-tip down to the intake port on the iron and see if it is oil soaked.

If it is running good at idle then I'd doubt it's a corner or side seal. Does it have good idle vaccum?
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Old Jul 28, 2004 | 01:00 AM
  #3  
bthomas16's Avatar
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It blows a cloud of grey/white smoke at idle. I wouldnt call that running "ok" at idle . I'm thinking another rebuild is in order.
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Old Jul 28, 2004 | 09:07 AM
  #4  
93BlackFD's Avatar
built my own engine
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or...to be less drastic

the OMP could be malfunctioning throwing oil in there....

if not, it's definately oil control rings or something requiring rebuild
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Old Jul 28, 2004 | 03:01 PM
  #5  
bthomas16's Avatar
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Yeah, it could be OMP, but I am a worse case scenario type person, so I am imagining it is going to need a rebuild.
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Old Jul 28, 2004 | 03:29 PM
  #6  
93BlackFD's Avatar
built my own engine
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find somebody local who is good with rebuilds
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Old Jul 28, 2004 | 05:10 PM
  #7  
bthomas16's Avatar
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LOL, who could that be.... j/k
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