Aircooled VW South Africa

Yes dependent on oil used it could thin the oil to such an extent to leak past the gap.

Herman

Is the breather pipe from the oil filler connected to the air filter?
No stock engine needs additional breathing, period.
If the pulley is letting out the oil vapour out, you have too much crank case pressure, then the breather system is a band aid to a bigger issue.
Yes a overheating engine will generate more crank case presure as cylinders / pistons don't seal as they should.

calooker wrote: ↑Mon Mar 02, 2020 7:13 am Is the breather pipe from the oil filler connected to the air filter?

Not connected, could this be the problem?

Well,.....you've heard from an array of people,...what worked for me and from ghurus that is far more experienced than me. You nowhave an array of options to follow through upon.
Good luck!
Haans

CONNECT THAT BREATHER PIPE....

my bus has been upgraded from 1600cc to 2100cc. I run one large diameter hose to the ground for breathing. Nothing fancy.
No leaks from the hose or the pulley.

I'll bet that you have oil inside your breather hoses (check the one coming out of the alternator stand).
Again, this is caused from excessive blowby. Doesnt matter if your compression tests are good, you still have blowby issues. Fix them and you wont have to use an elaborate breather setup on a stock engine.

It could be that your case is cut for a larger pulley and you are using a stock pulley, but if it didnt leak when new, then its not likely the case

And no Herman, a thin oil shouldnt come out of the pulley either as the pulley is pushing air into the case.
It works like a version of a labyrinth seal, which cannot physically leak when in operation unless something is wrong.
Think of the effects of trying to piss into a 30knt wind... I suspect you'll get wet - thats how the crank screw works, oil thickness has nothing to do with it.

Tony Z wrote: ↑Mon Mar 02, 2020 12:59 pm ...And no Herman, a thin oil shouldnt come out of the pulley ..

Agreed Tony, but I am sure if the gap between block and pulley is incorrect, hot thin oil will piss out faster then thick oil.

This is what is being said ......

John Alves wrote: ↑Fri Feb 28, 2020 12:27 pm

Donovan D wrote: ↑Fri Feb 28, 2020 6:47 am Thanks for the post, I actually noticed oil on my dizzy and also an oil stripe on the roof of my engine bay on the George trip.
The pulley is def throwing some oil around but its not dripping out.

exactly my problem

Can not remember him saying anything about pressure in the sump. normally the back flywheel seal goes 1st if I remember it right.

If the breather pipe is off and the oil still comes out, its not sump pressure.

omo

Herman

Tony Z wrote: ↑Mon Mar 02, 2020 12:59 pm my bus has been upgraded from 1600cc to 2100cc. I run one large diameter hose to the ground for breathing. Nothing fancy.
No leaks from the hose or the pulley.

I would then say you never take it over 5500 RPM.
Probably 95% of the motors I have built that can rev freely have struggled to keep the oil mist iside the crank case, additional breathing / sand seal or even both was the solution.

Haans wrote: ↑Sat Feb 29, 2020 2:23 pm

If you going to use this kit, get decent quality piping, what come in the kit is POS.

Thanks all, will try a few things and let you know

calooker wrote: ↑Mon Mar 02, 2020 2:01 pm

Tony Z wrote: ↑Mon Mar 02, 2020 12:59 pm my bus has been upgraded from 1600cc to 2100cc. I run one large diameter hose to the ground for breathing. Nothing fancy.
No leaks from the hose or the pulley.

I would then say you never take it over 5500 RPM.
Probably 95% of the motors I have built that can rev freely have struggled to keep the oil mist iside the crank case, additional breathing / sand seal or even both was the solution.

thats correct, it isnt a high revving engine.
The point is/was that it is bigger than stock, revs higher than stock and still has no breathing issues with a single pipe - thus indicating that a stock engine with oil/breathing problems has something wrong with it

Crank case pressure caused by ring blowby
OR
Someone line bored the case, and machined the nose of the case that will require an oversized pulley, but no oversized pulley was fitted.
OR
Undersized poor quality pulley
OR
Normal breather not functioning (not connected to source of negative pressure)
OR
Dirt blocking the triple-start thread on the nose of the pulley, preventing oil being returned into the case.

calooker wrote: ↑Mon Mar 02, 2020 10:30 am CONNECT THAT BREATHER PIPE....

pipe reconnected and I have noticed the motor has more power and runs smoother, will monitor the crank pully leak

John Alves wrote: ↑Thu Apr 16, 2020 3:37 pm

calooker wrote: ↑Mon Mar 02, 2020 10:30 am CONNECT THAT BREATHER PIPE....

pipe reconnected and I have noticed the motor has more power and runs smoother, will monitor the crank pully leak

Did you manage to sort out your leak?

leak continued, removed motor and am busy with top end rebuild at the moment, heads were coked up badly, and lots of blow-by evidence,
I will check ring gaps