Oil in Throttle Body

ONLY for ADVANCED technical discussion about the 240sx!
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BoomSlang240sx
Posts: 14
Joined: Fri Jan 08, 2010 5:02 am
Car: 1991 Nissan 240sx

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I have just replaced my valves and valve seals in my KA24de and now whenever I try to start my car, oil is being thrown back into my throttle body and intake pipe. My compression is perfect so I don't think that it is a crack anywhere but right now I am just trying to figure this thing out. Any help is welcome.

Thanks for looking.


compactfean
Posts: 2602
Joined: Thu Dec 03, 2009 10:28 am
Car: 89 240sx s13 sr gt3071r 23psi
B14 sentra ser sr20de-t 7psi
daily
Location: reno nv

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Worst case scenario piston rings. Did you check the valve guide gap? My motor did the same thing when I started cranking up the boost. I just rerouted the valve cover tube to catch can instead of the inake and was good for another year and a half. That's when I had to rebuild the bottom end, car was smoking hella bad.

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BoomSlang240sx
Posts: 14
Joined: Fri Jan 08, 2010 5:02 am
Car: 1991 Nissan 240sx

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No but I will try that. Anything else?

shiro_neko
Posts: 112
Joined: Fri Jan 22, 2010 7:51 am

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check your PCV first. if the PCV is not able to suck out all the blow-by gas it comes out in the blow-by hose (the hose between the valve cover and air cleaner pipe) along with the oil.

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BoomSlang240sx
Posts: 14
Joined: Fri Jan 08, 2010 5:02 am
Car: 1991 Nissan 240sx

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Thanks for the ideas:) Hopefully it is something small butif not owell. I will just have to keep on keepin on.


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