oil spitting out of BOV

[Heavy D]

well since i just got my car started, i did a gasket rebuild on the car, and i even rebuild the turbo, the proper way and every thing, i even double check my gaskets and every thing is all set, but even before i had the turbo rebuilt, there was oil spitting out of the BOV, like if it had a bad gasket on the turbo, can it be the PCV system? the turbo is rebuilt and has that very very minimum play, car boost really hard and quick, also this is a stock CT26, just rebuilt, and oil is coming out of the BOV like crazy, only when i build up boost while driving, its weird, i would like to keep using the turbo until i find another, if its bad.

also this is a 88 GTE, 5spd with 165k miles

 

[GrimJack]

How much blowby does the engine have, and how are is your PCV system routed?

 

[RazoE]

my BOV shot out oil, turned out to be a messed up turbo bering, but since you just rebuilt, might be blow-by..

 

[Heavy D]

the PVC system is how it is always is, just the normal setup. blow by as in the piston blow by? not sure but i can try a compression test tomorrow

 

[GrimJack]

Just take off the oil cap and start up the engine. Tell us if there is a little air coming out the hole, or a lot.

 

[Heavy D]

ight i will check that tomorrow, thanks, also right before i did the headgasket, i had the oil cap off, oil didnt come out spraying from the oil cap, does that mean there is blow by? as for air i dont think there was much air coming out, i remember when i did the headgasket on my 1.8L corolla lots of air was coming out and oil spitting out from the oil cap

 

[GrimJack]

It's unlikely in the extreme that oil would spit out of the cap. However, what you will get is a certain amount of air - exhaust, actually, that's leaking past the rings. On a worn (or possibly broken) engine, you will get a lot of this, and it does carry oil with it. That will build up over time in your IC pipes, and cause things like leaks from your BOV. I've seen engines that managed to push a couple liters of oil into the intercooler over time.

 

[Heavy D]

im just hoping its my PVC system, cause its weird to get oil into the intake system if its blow by from the piston, cause if its blow by then the oil will shoot through the exhaust and not through the intake, also when i did my headgasket, my intercooler poured oil out like if i was doing a oil change, but i still had the same amount of oil on the dipstick, i might just a try a oil catch can to see if it helps out, cause its hard to seem that oil with blow by will go to the intake.

i had a tercel( see the avatar) right before i did my turbo swap, i was messing with the single cam motor, and messed up 2 rings and wasted a quart of oil a day and all the oil was going through the exhaust, and i never seen oil in the intake mani or pipes, and i had extreme blow by, like my compression was 200-140-145-195, and i still remember that compression cause thats when i know that i needed a new motor, so i did the turbo swap.

 

[IJ.]

Blowby will ALWAYS end up in the crankcase>PCV>Intake.......

If the PCV system can't handle the volume produced it will either push the dipstick out on boost or in bad cases push the front or rear main seals out.

 

[Heavy D]

well the only thing i didnt mention that i shimmed the wastegate, but then even still when it was factory was still doing it, i know the factory BOV was not working and then the kid before had a EBAY knock off BOV, so i had a spare turboXS RFL hanging around.

but will a oil catch can, can improve the oil problem? most likely ill get one to try, car the car start up real fast, with no hesitation, and turbo spools around 2-2.5k rpm since i changed the elbow until i get a good exhaust

 

[IJ.]

A catch can is going to help some but it's a bandaid at best, how high has it been boosting?

 

[Heavy D]

well the problem was happening at 5psi, the factory setting? and then i bumped it up, and still happens, i just thought that once boost comes in, the air gets forced back to the cam cover and then back into the turbo, which i really dont like, i remember on my starlet motor, i had a PVC VALVE the actual valve, and then another hose from the valve cover to the, and i think that with the supra its just making a mess, i might try to unplug the vacuum from the turbo to see if oil spits out from there

 

[IJ.]

Do a comp or a leakdown test on the engine and post the results..

 

[Heavy D]

well i just did the first 2 cylinders cause my battery is not good so it keeps dying, well cylinder got 145, cylinder 2 got 150, but when the battery died it showed 90psi, ill try to check with the others when the battery gets charged again, i need to get a good working battery that is not dying, plus i dont use the car yet since i just started working.

also i checked the TSRM and shows that the max should be 156, and minimum is 128psi.

also this is a 165K motor, factory head gasket, with ARP bolts TQ to 80lbs with 4 sequence

 

[Heavy D]

well my battery is starting to shit on me so i couldnt really do a good compression test yet, im gonna get a battery this week coming up, but i checked my plugs to see if they are covered up with oil but they are not, they are all brown and smell like more of gas than oil, and plugs seem to be at the normal stage, and i only run 93 octane, and the other day the oil is not spraying too much oil now, kinda like if its in a spray bottle just spraying mist out of it, but i dont like it since its next to the exhaust, i could relocate the bov so it can spit away from the motor, but im still gonna do a compression test, and get a oil catch can

 

[Heavy D]

well after now that i rebuilt the turbo and the headgasket and what not, seems like i get less and less oil coming out of the BOV, i did relocate the BOV by the intercooler, my car does not smoke, and i took the intercooler pipe off, and revd it couple times to see if oil comes out, but doesnt really, could it just been all of the oil that has been in the pipes just being moved? i did try to clean some and empty out the intercooler when i did the headgasket.