[waxer52]

ok I just noticed after a quick spin with a mate behind me that there is some blue/whit smoke coming from my exhaust at high revs (4500 and above). I have had a look in the intercooler pipes and there is some oil residue in there.
About a month ago I did a compression test and the results were:
No.1 - 157
No.2 - 154
No.3 - 150
No.4 - 150
No.5 - 155
No.6 - 150
I don't think the results are too bad, but could it be my piston rings. I don't have an oil catch can installed, but I wouldn't think the engine would throw that much oil into the inlet. Could it possible be an oil seal on my turbo?

Any help?

 

[Bruce-m]

Will probably be more likely be your turbo oil sills.

 

[waxer52]

What do you think of the compressions. Are they fairly ok, (this is on a 1993 rb25det).

 

[Bruce-m]

Yeah there fine, they ideally have to be 10% within each other.

 

[waxer52]

Would the fact that the oil seal in the turbo is gone affect my boost. I get a lot of spiking lately high in the rev range.

Also how hard is it to do the oil seal and would i be better to get the turbo high flowed at this point.

 

[Bruce-m]

Yeah if the oil sills are gone it would affect the boost.

If you've got the funds then yes this would be a good time to get the turbo rebuilt with steel internals by a reputable company.

 

[waxer52]

Bruce, your the man with a plan. Turbo rebuild and 400bhp here I come......