Oil blowing out of the BOV

[rc1honda]

Sup guys well I think my motor may be done for I just wanted to get some perspective.


Saturday, my buddie and I fixed my boost issue. I was stuck at 14psi and it was tuned for that boost.

Well i wanted more boost and we figured out and put a controller on it. Got to about 1.6 bar. We were on the highway doing oulls and everything was fine.

Low knock
Good AFR

Then all of a sudden we see smoke. We pop the hood and see that a good amount of oil blew out of the BOV. Now the car won't boost at all either. And by good amount I mean probably about a quart of oil is in my intercooler and a good amount of that came out of the BOV.

So the car runs fine just no boost.

Any ideas. We think it's the rings but what do you guys think. I was hoping it was the turbo.

Edit: Motor is a s13 SR
2871r turbo
all proper supporting mods.

[n8RPS13]

Turbo seals are TOAST!!!! What type of turbo?

[S-Nation S13]

Oh no seals..might be jacked ..

Damn ^^^ beat me to it lol..

[Dustxking]

When my bov was spitting oil/smoke from touching the hot manifold it was because i didnt have a catch can, yours have one?

[Corey121]

So smoke is coming out from under the hood and not the exhaust and you think the rings are toast, hmmm, im going to go with the guy that posted above since everything your saying points to a turbo issue and not a motor issue, your seals are gone alowing oil to pass through.

[VinceDude]

i know a guy selling a t25 for $150 :)

[rc1honda]

So smoke is coming out from under the hood and not the exhaust and you think the rings are toast, hmmm, im going to go with the guy that posted above since everything your saying points to a turbo issue and not a motor issue, your seals are gone alowing oil to pass through.

Ok you must be new here. And seeing as your trying to help I'll give you a pass. Just know that a lot of blow by is in fact a strong sign of piston ring failure. So please, I have been through hell and high water on my build and don't need condescending remarks. I know enough not be talked down to in any circumstance, but not enough to think I can't learn from more knowledgeable people.

That being said blow by is pretty inevitable at 1.6 bar so i was hopping the motor is still fine and it's the turbo that bad. Like I said the motor is running perfect just at it sits it's now NA motor lol.

No I don't have a catch can. I have it rerouted for the T to right before the turbo. But, again this was not a small amount of oil. I would say it probably sent a quart through the intercooler. With a a good amount through the BOV.

So that's what makes me think piston rings. If i did have a catch can it would of been damn near full after about 6 good pulls at high boost. But like I said now the car wont boost.

Also the turbo is a Garret 2871r with the .86 housing.

Also I guess now is to pull the mani and just check for shaft play? Will that answer my question or is there something else i should be doing?

Also, was it possible for a large amount of blow by to kill the turbo. I can't imagine a large amount of oil going through the compressor is a good thing. Maybe my lack of catch can killed my turbo when the motor was having a large amount of blow by?

Also i will be doing a comp. test asap.

[rc1honda]

i know a guy selling a t25 for $150 :)

No good man, my setup is able to support 400hp pretty easily. Well, it was until yesterday. :Owned:

[PureRush]

Obviously its your turbo. Take it apart and look at it or buy a new turbo if youre that lazy. I mean if the motor runs perfect and doesnt boost, what do you think the problem would be? Use common sense

[240ss]

You don't have to pull the whole manifold off just to check for shaft play. Just take the intake off and give her a wiggle

[Boost_Fiend]

exact same thing was happening to me. low comp on #1 cylinder. enjoy!

do a compression test asap

[daftphunk]

I bet when you take your intake pipe off there will be a ton of oil in your turbo housing, blown turbo seals dude! Think about how a BOV works and why oil would be shooting out of it. It's coming from the turbo

[VinceDude]

No good man, my setup is able to support 400hp pretty easily. Well, it was until yesterday. :Owned:how much boost are you pushing and are you running stock internals? That's crazy man haha

[STR8E180]

sounds like u blew the turbo seals and its pissing oil in to your intercooler piping which is venting out of your blow of valve

[conrad_s13.5]

did you ever blow a coupler from ur intercooler piping and continue to drive a bit?

[army240]

Blow-by is when the compression is going into the oil pan(via work piston ring of cracked piston). Blow-by sign are :

Oil dipstick always out(not completely seated)
You can feel some air pushing out of the catch can tube
You can feel some air pushing out of the oil filler cap

I've never seen sign of oil getting inside the intercooler because of blow-by.

Being that said, it's probably your turbo that is broken. Check your shaft play. Your turbo will probably be filled with engine oil too.

Have a good day,

Frank

[rc1honda]

Yes the motor is stock internals and I was pushing 14psi for awile. When the in incident in question happened I was pushing about 1.6 bar so around 23 to 24 psi. The head is built though with a Apexi HG

To army240 as far a so know I have none of those symptoms. The only thing is that I don't have a catch can and the hose is goin from the Valve cover T to the turbo intake before the turbo.

When I put my headgadket on I did a leakdown and it was 5% on all cyclinders. Again when this happened knock was low and my A/Fr never web about 11. So maye I got lucky and it the turbo. Going to check the turbo tonite and try a comp test. I will update

[rc1honda]

did you ever blow a coupler from ur intercooler piping and continue to drive a bit?

Not that I know of. I was sick of boost leaks so went all out with 4 ply silicone couplers and good quality T bolts clamps.

[army240]

To army240 as far a so know I have none of those symptoms. The only thing is that I don't have a catch can and the hose is goin from the Valve cover T to the turbo intake before the turbo.


So just disconnect the T coupler and check if oil is coming from there, or if you can feel air coming out.

Let us know!

Frank

[rc1honda]

So just disconnect the T coupler and check if oil is coming from there, or if you can feel air coming out.

Let us know!

Frank

Oh yea there is air and blue smoke coming from the T from the valve cover

[rc1honda]

Ok compression results are in.

Cylinder 1

Dry- 150
wet-160

Cylinder 2

Dry-90
Wet-92

Cylinder 3

Dry-60
Wet-62

Cylinder 4

Dry-121
Wet-152

So it seems like like 2 and 3 are toast. The only thing that may be possible now is the HG might be blown seeing as 2 adjacent cylinders are low and the other 2 are ok.

Any thoughts are welcome.

[Briou]

Yeah man looks to me like 2 and 3 are done for. Did you ever end up checking your turbo? I would have thought for sure the seals would be done for from what you described!

[rc1honda]

Yeah man looks to me like 2 and 3 are done for. Did you ever end up checking your turbo? I would have thought for sure the seals would be done for from what you described!

No haven't check it but seeing as how it was brand new and has less then 1000 miles on it I think it's ok.

I mean it only went 24psi the garrett should handle that fine. Might not be effective but it should be cool.

[Jtuned_andy]

Something is wrong with your cylinder 4 if you dry/wet difference was 30psi of compression. Rebuild time

[rc1honda]

Something is wrong with your cylinder 4 if you dry/wet difference was 30psi of compression. Rebuild time

This has also occured to me. Seems like all my pistons are fucked. Except good old cylinder 1.

I should take my #1 piston and build a ATV motor around it. It would be bulletproof :hs:

[fliprayzin240sx]

So wait, do you have the valve cover T still plumbed back to the intake? Oil might be coming from there if its still hooked up.

[1slicktwo4oh]

Same thing happened(BOV spitting oil) to me a while ago, everyone I asked keep telling me it was my turbo, they were all wrong! I had two busted rings #3 & #4. J just went ahead and rebuilt the whole engine, just too avoid any future problems...

[army240]

Yeah didn't figured out that your valve cover ventilation was recirculated in the turbo intake on my first post.

So yeah, looks like it's rebuilt time. If your lucky, might be the HG only... but you should check all 4 pistons to make sure they aren't cracked between rings. It's better to take appart once and do a good job!

Inspect every thing and replace if necessary!

I hope it helps,

Frank

[Tarrbaby]

i would still be checking your turbo as all that oil had to get through to the BOV somehow and my guess would be through the breather hose into the intake and through the turbo.

turbo's are designed to compress air and not oil. could still have done big damage to the turbo

[rc1honda]

So wait, do you have the valve cover T still plumbed back to the intake? Oil might be coming from there if its still hooked up.

Yes line went front valve cover T to the turbo I take. I have a catch can but it was a huge greddy one that a couldn't find a mount spot for so I left it. Didn't think it would be a issue if there wasnt to much blow by.

Well looks like I was wrong.

Word to the wise. If your car is making over 275hp use a catch can.

[fliprayzin240sx]

Oil is more than likely coming out of the T, you checked your catch can to see how full it is? Its probably full. Pop the back line off the T (the one that goes down the crank case) and check that line out. If its smoking or its pulsing, thats air getting thru your rings...