Oil Loss On Turbo Engine

[t90_lle]

So I appear to have blown all my engine oil through the breather over the block and gearbox. I was just wanting to know potential causes for this to do it as an idea to give my mechanic. I’ve topped the oil back up to see if the is an actual physical leak anywhere as I’ve had no drips on the drive before seeing the rainbows yesterday from the rain. Any guesses or ideas would be appreciated.

 

[JamesBryan]

If it is out of the breather, then you have crankcase pressure which is usually worn/broken piston rings.

 

[t90_lle]

If it is out of the breather, then you have crankcase pressure which is usually worn/broken piston rings.

As a guess I would say so… do to where the oil is in the engine bay.

 

[Krarl]

Yeah pressure in the crankcase, typically rings

Do a leakdown test and you'll get your answer

 

[t90_lle]

What pressures should I be looking for on a healthy engine after a compression test?

 

[Krarl]

Depends if you're doing wet or dry and with the car up to temp or flat cold

Flat cold dry you should get like 180-190psi for a good cylinder. Anything below 175 and it's a bit shite

 

[JamesBryan]

Yeah anything north of 170 really.

 

[Louis]

Being consistent is key.

 

[JamesBryan]

Being consistent is key.

But if they're all consistently 100psi, then it's fucked 😂

 

[Louis]

But if they're all consistently 100psi, then it's fucked 😂

Unless it's the gauge you're using 😂 likelihood of that is low for 100 across each cylinder?

 

[JamesBryan]

Unless it's the gauge you're using 😂 likelihood of that is low for 100 across each cylinder?

Yeah i'd imagine that'd never happen.

 

[t90_lle]

Depends if you're doing wet or dry and with the car up to temp or flat cold

Flat cold dry you should get like 180-190psi for a good cylinder. Anything below 175 and it's a bit shite

I’m driving it down to see Alex in the new year on the 7th Jan, So what about hot/warm temp pressures or it’d best to let it cool down 1st I reckon?

 

[Krarl]

I’m driving it down to see Alex in the new year on the 7th Jan, So what about hot/warm temp pressures or it’d best to let it cool down 1st I reckon?

Alex will probably letit cool of a bit first. Tbh you can comp test them hot but your readings will just be a certain percentage higher as the rings close up

 

[JamesBryan]

Wouldn't harm it being a bit warm, as realistically your engine doesn't operate at stone cold for long.

 

[t90_lle]

Alex will probably letit cool of a bit first. Tbh you can comp test them hot but your readings will just be a certain percentage higher as the rings close up

Wouldn't harm it being a bit warm, as realistically your engine doesn't operate at stone cold for long.

Brilliant cheers for the info gents!
Just hope it goes well and I don’t need a rebuild 😂

 

[Donny_Dog]

I had similar, thought the rings were toast.
I'd put too much oil in. Not knowing exactly what I should put in, after fitting an oil cooler.


and having a few beers doing a service.