Oil/fuel Smoke/vapour From Dipstick Tube

[f4cfed]

Hi all

Bit of a drama with my s1 r33 gtst.

It's an rb25det. My problem is there seems to be a smokey/ vapour coming from my dipstick tube where the dipstick inserts. It has a oil/fuel smell to it. Any ideas on what this could be

Thanks

[Kane_R32]

worn rings leading to pressuring the crankcase with fuel from the combustion process, perhaps?

[MrStabby]

There should be a rubber seal on the dipstick - sounds like yours is leaking so you need to fix it. Those fumes are supposed to be taken care of by the PCV system.

[89CAL]

Is it blowing the dipstick out under boost?

[f4cfed]

Yeah blows out I have to keep putting back in oil comes out also

[MrStabby]

Check the PCV system isnt blocked. Check the dipstick seal provides some grip against the tube to hold it it. Otherwise Kane's right - its just too much blowby

[f4cfed]

Compression at 30 psi on cylender 3 could it be rings

[Kane_R32]

do a leak down test to confirm rings, valves or head gasket..

[f4cfed]

Compression is 30-40 psi in cyl 3 could it only be rings