Rb20det Oil problem

Discuss the RB20, RB25 and RB26 series engines.
sk84lifesteve
Posts: 1
Joined: Thu Sep 16, 2010 1:47 pm
Car: 1991 Nissan 240sx with RB20det

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I got a 91 240sx hb with a rb20det swapped into it. The motor has burnt oil since i got it. I was able to easly push 10 to 11 psi on my turbo. It has the stock turbo on it so i thought that it was blowned. But then i tore apart my engine bay to change out my mounts and paint. My turbo has only some shaft play horizontaly but none at all verticaly. Is it blown?
Then i looked at all my intercooler piping and noticed that there is oil allover inside the piping. Then i looked at the stock valvecover piping i had on my car and it looks like im getting blowback from there and putting it down into my intake. Is this normal to happen? Should i just run the valvecover piping from my intake to a can to catch the oil coming out of there? :confused:


evildave32
Posts: 51
Joined: Fri Aug 27, 2010 6:19 pm
Car: 91 240sx rb20det

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I am currently having the same problem Carl H told me the front seal on the turbo is blown out(there for all the blow by oil)get any other hits on the subject keep me posted,Thanks :biggrin:

Sil240
Posts: 2973
Joined: Mon Apr 28, 2003 5:26 pm
Car: Nissan S13 "The One Cam Wonder"

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If I were you I would do a Compression test.
If you get any un-even #'s or out of spec, then do a leak down test.

If everything is cool just get a catch can throw some steel wool in there.
One end to the valve covers the other to your intake pipe.


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