How to fix oil blow by?

[Paul Bellisario]

so under full boost I'm getting oil blow by. what have you guys used to fix this? vacuum pump?

 

[dsmith4994]

if it is a lot of blow by:
analyze it by doing a compression check
could be valves or rings

 

[NY Twin Turbo]

Time for a freshening up/rebuild. A vacuum pump? Never seen one on one of our motors unless it was a race car with a dry sump oil system.

If it's blowing oil out of everything and your exhaust is blue and the turbo isn't blowing raw oil out the tail pipes, it may be time.

Do you hear a lot of piston slap when it's cold?

 

[Paul Bellisario]

i meant oil leak under full boost I'm gonna try another breather set up on passenger side

 

[Paul Bellisario]

nothing wrong with the motor

 

[dvernst]

Can you tell where the oil is coming from?

 

[pacecarta]

nothing wrong with the motor

is this a statement or a question

 

[TT/Ameasap]

Im guessing he is referring to the oil pushing out the breathers under full boost. This is a common problem with any boosted motor.
I made a nice aluminum breather for the PS valve cover a while back.

 

[Paul Bellisario]

ya im gonna try a new breather set up

 

[Scott89TTA]

Installing -12 AN fittings and hoses to both valve covers and running them to a remote catch can, also did away with the PCV.

 

[TurboBuRick]

Hey Paul,

Like suggested, catch can's are the best way to eliminate oil from the valve cover breathers. I would never eliminate the pcv but do make sure it is in good working condition. It acts as a check valve and should seal shut under boost.

Rick

 

[dvernst]

Hey Paul,

Like suggested, catch can's are the best way to eliminate oil from the valve cover breathers. I would never eliminate the pcv but do make sure it is in good working condition. It acts as a check valve and should seal shut under boost.

Rick

Just wondering why you wouldn't eliminate the pcv? I feel like that is one of the best mods I have made on my car. I also installed a drivers side valve cover on the passenger side, and I run a Metco breather on both valve covers. I also drilled out the openings in the breathers too have as much flow as possible with minimum velocity.

 

[dvernst]

i meant oil leak under full boost I'm gonna try another breather set up on passenger side

Have you been able to pinpoint the leak?

 

[Paul Bellisario]

no i haven't yet haven't took it out for a blast yet

 

[Paul Bellisario]

yeah I'm going to do all of that dave

 

[TurboBuRick]

Just wondering why you wouldn't eliminate the pcv? I feel like that is one of the best mods I have made on my car. I also installed a drivers side valve cover on the passenger side, and I run a Metco breather on both valve covers. I also drilled out the openings in the breathers too have as much flow as possible with minimum velocity.

The real question is why would one eliminate it? It closes shut under boost and eliminates itself. The only time it's working is when the motor is in vacuum. Unless it's faulty and allowing boost into crank case.

The PCV plays a important role pulling moisture and crank case emissions out that would otherwise be deposited in the oil. Not to mention it keeps the noxious fumes out of the cabin. Your girl friend will be much happier too!

 

[Paul Bellisario]

Hey Paul,

Like suggested, catch can's are the best way to eliminate oil from the valve cover breathers. I would never eliminate the pcv but do make sure it is in good working condition. It acts as a check valve and should seal shut under boost.

Rick

thanks for info Rick

 

[dvernst]

The real question is why would one eliminate it? It closes shut under boost and eliminates itself. The only time it's working is when the motor is in vacuum. Unless it's faulty and allowing boost into crank case.

The PCV plays a important role pulling moisture and crank case emissions out that would otherwise be deposited in the oil. Not to mention it keeps the noxious fumes out of the cabin. Your girl friend will be much happier too!

Keeps the throttle body cleaner, and under boost those fumes will blow out through the breathers anyway. As far as the moisture it's pulling out under vacuum that does make sense to me. I'm not saying never, but I rarely have smelled fumes inside my car. Running a catch can with long hoses to it off of the valve covers creates a lot of velocity through those hoses, and that right there will carry extra oil to the can. I believe Paul's problem is a bad gasket somewhere. Not blow by through his existing breathers. Once I eliminated my pcv I finally was able to pinpoint my leak which would only occur while driving, and not when idling under vacuum. Bad oil pan gasket. I have seen no negatives since I've eliminated the pcv.

 

[dvernst]

Egr is eliminated too. Had my intake ported by Champion, and they cut out and weld shut the tower for it.

 

[Paul Bellisario]

well I'm only getting a leak under wot and i do have a new oil pan gasket