Hello all

On the subject of breather systems I think I've got an issue with the std setup.
Fully rebuilt the engine last year to standard spec using mahle .5 over sized pistons , new oil & water pump , head rebuild , valve guides , stem seals etc. All new gaskets & oil seals.

T3 has been replaced with a t34 - still running standard power.

After the running in period was complete I noticed oil leaks from both crank seals , and I also get a lot of oil smell through the cars air vents when changing down on overrun.

Had the rear main replaced with a victor reinz oil seal - not even 100 miles later leaking again. i got underneath wiped down the sump & gearbox and ran it on idle and no leak. So can only assume its oil crank case pressure forcing it out.

Removed all breather pipes inc kidney box all clear no blockages , air filter is a k&n panel filter - also clean and clear.

Any ideas ?
Cheers
Clark