rb25det failed pcv valve. what damage could be done? *long*

[ANVIL]

The other day after a few hard pull in my rb25det s13 i noticed my car bog and just wasn't idling the same. I smelled smoke so i pulled over and checked under my hood. there was oil leaking out of my valve covers and the tube from my valve cover had popped out. It was still running and i noticed some smoke/vapors coming from the hole. The way its plummed is the intake side valve cover vent connected to the exhaust side valve cover vent with a T that goes to my intake tube in between MAF and turbo.

http://img.photobucket.com/albums/v708/ANV1L/Mobile%20Uploads/20150428_224704.jpg (http://smg.photobucket.com/user/ANV1L/media/Mobile%20Uploads/20150428_224704.jpg.html)

I put it back in and drove it home, i was only about 3 miles away. when i get home i take off the coil cover and the inner valve cover had leaked a lot of oil into the spark plug galleys, one got so bad one spark plug was like 90% submerged in oil. I figure this is why it bogged and not running the same, plug probably not firing or not as strong because all of the oil.

Thinking about what happened lead me to believe the pcv valve had let boost into the valve covers, causing them to leak oil and pop the fitting off. Take off the pcv and blow into it and indeed it lets quite a bit of air through, and thats just with my mouth so imagine 20-22psi of boost that i was doing allowed a lot of high pressure air through.

At this time i noticed oil leaking through a coupler for my ic piping. Took it off and theres quite a bit of oil in my intake tube to the turbo and my intercooler pipes. Id guess the pressure forced oil to the vent tube to my intake, went through the turbo and into the pipes.

So i have it all cleaned up now from all the oil and im going to pick up a new pcv and grommet today and put it back together and see what happens.

So finally the big question... what damage could have been done? Anyone know the part number for the pcv and grommet? After what happened im definitely putting in a catch can and im debating deleting the pcv all together and plugging the hole in the valve cover and capping the vacuum feed to it on the intake manifold. Hoping nothing major but i have the worst luck with my rb so im preparing myself mentally for the worst... let me know your opinions. Thanks in advance and thanks for reading.

[Kingtal0n]

Just clean everything up and replace the pcv valve. You should have changed it when you first acquired the engine, they do not last forever. As long as you put the new one in, and that puts a stop to the oil blowing out of the crank case, you are fine.

There is no damage from boosting into the crank case unless you blow out an oil seal, but there is a potential for an oil mess. You might want to pull the hot pipe and clean it also, and some water/simple green for the compressor wheel is how I cleaned mine.

[ANVIL]

Just clean everything up and replace the pcv valve. You should have changed it when you first acquired the engine, they do not last forever. As long as you put the new one in, and that puts a stop to the oil blowing out of the crank case, you are fine. There is no damage from boosting into the crank case, but there is a potential for an oil mess which is the biggest concern. You might want to pull the hot pipe and clean it also, and some water/simple green for the compressor wheel is how I cleaned mine.

Thank you for your input. Making me feel better that maybe nothing was really damaged. I brake cleaned all pipes to clean the oil, wiped down the compeessor with a rag soaked in brake cleaner and what i could out of the fmic. Also letting everything sit overnight to settle and allow anything i missed to drip and will double check and clean everything again tonight.

[ANVIL]

So i got everything cleaned up and put back together and it still ran rough. Decided to compression test and 1-4 is 155-165 and 5 is 90 and 6 is at around 70 ;(

taking a break cuz im supee bummed and irritated knowing its likely something major. Point me in the right direction? what can i do to confirm what needs to be done? Can bad valve stem seals cause that bad of a compression drop?

[feito]

unfortunately it sounds more like your pistons rings might have gone. Do another compression test but this time wet, by adding a little ATF into the cylinder before you connect the tester and start cranking. If that brings up your comp your rings/ringlands are gone. How many pounds of pressure were you running? It sounds like those last hard pulls really took their toll on the rb...
A leaky pcv valve couldnt have caused this.

[ANVIL]

Thats what i was afraid of. Was in the middle of a street tune was around 20-22Psi. How much is a little? Like a cap full?

[ANVIL]

If it wasnt the pcv idk what could have caused it. We were only on like the 8th or so pull and the first 2 pulls were just logging my previous tune @ 18psi which ran perfect and strong.

[Kingtal0n]

The rings on that engine are delicate, I have seen them fail at 11psi with a slight lean condition. Same exact situation, low compression on the rear two. Started blowing oil everywhere under boost. That is what caused your oil to go everywhere, not the pcv valve, likely that pcv valve had been leaking for a long time already.

You can't run a stock RB/SR at 18+ psi, especially back to back passes, and expect it to live forever. The weak spot on these engines is rings; I would have told you to lock it down at 15psi max, but then I would have been laughed at and told by 5 new posters that they had an RB and it put down 500rwhp forever no problems. Which I think is where this mentality of indestructible RB engines comes from, just talk.