Crankcase pressure, turbos leaking oil

[98roush]

Figured I’d start a new thread since this doesn’t relate to my previous one

History of previous issues with it.

https://xoutpost.com/bmw-sav-forums/...aptations.html

2010 X5 xDrive35d

So I had a intercooler completely FULL of oil. I’ve pulled off both charge hoses and started the car to find that the crankcase is Being severely pressurized and oil is heavily flowing out of the turbo outlet.

I’m aware there is a valve cover gasket that can cause issues but that is only affected by boost pressure correct?

It is possible I have a pretty oily DPF causing high exhaust pressure is there something that could cause it to back up exhaust gases into the crankcase?

[Sophisticated Redneck]

I would be more suspect of your turbo oil return lines. Mine were completely clogged from coked up oil. My intercoolers were soaked in oil and it smoked like a James bond smoke screen. Replaced with new lines and it solved the issue.

Also to make sure you don't also have some issues with CCV, the only way to be sure is to add a boost/vacuum gauge to the crankcase. Just tap the oil cap and put the sender right in it. That's what I did for mine when I was designing my own catchcan and adjustable vacuum setup. Was on quite a different engine (N63) but same concept applies.

[captpilly]

I am having a similar issue and Indy is saying to replace IC at $1100 - thoughts? Have a pretty big oil leak that has gotten worse over the past month.

[98roush]

Been meaning to do a update. So.....

The car has been on the roads and going strong for 3k miles so far with a new/used engine.

Starting from the beginning my wife was driving one day and she said it made a horrible noise, smoked a lot and died. About an hour later it got towed home. Actually started right up and drove it on the truck. Once home I took it down the street light throttle and it did it to me. Got it back home. And started tearing into it. Thinking it was a HPFP/injectors flooding the cylinder. Supported by finding contaminate in the fuel system signs of water contamination. CHANGE YOUR FILTER/WATER SEPARATORS!

Replaced HPFP/injectors and cleaned every single line. Still ran like crap. With a ton of blow by.

Pulled the HP turbo exhaust housing off to find the turbine was completed locked up. Bearing section was grenaded!

Replaced turbo. Car won’t start. Pulled the intake tube off Starts right up.

Intercooler is COMPLETELY FULL of oil. Removed drained cleaned

At this point it is running, blow by is normal. All is good. Then she starts smoking like crazy because of course the exhaust is full of oil too. So removed drained cleaned

Back together and on the road. Still some residue burning off but it’s running fine. 15 min later original damage from hydro locking shows it’s face and I started to get a knock

It had bent and twisted the rod. Wiped out the bearing and crank journal

So I sourced a 60k mike 335D engine. Certainly cheaper than a X5 engine. But it did require basically tearing it down to a long block to put on a X5 oil pan, timing chain cover and accessories on it. I put my new turbo and HPFP/ injectors in it.

[ard]

Originally Posted by 98roush

original damage from hydro locking shows it’s face \

How did this happen? Did I miss this?

[98roush]

Originally Posted by captpilly

I am having a similar issue and Indy is saying to replace IC at $1100 - thoughts? Have a pretty big oil leak that has gotten worse over the past month.

As for your issue it may be just the red boost hose from turbos to intercooler. It’s common for them to go bad and leak but then you should have a noticeable boost leak. Or just the intake gasket to the turbo. Blow by accumulates in that tube and can leak when the donut seal dries out and cracks. Needing a new intercooler for a oil leak seems odd.

[98roush]

Originally Posted by ard

How did this happen? Did I miss this?

I guess you wouldn’t call it “hydro” (water) rather than “hydra”(oil) locking. The turbo failed. Filled the intercooler with oil. Oil got sucked into the back cylinder #6 while running causing lock up and bent rod.

[Happy]

Originally Posted by 98roush

The turbo failed. Filled the intercooler with oil. Oil got sucked into the back cylinder #6 while running causing lock up and bent rod.

Ouch!

Originally Posted by 98roush

I’m aware there is a valve cover gasket that can cause issues but that is only affected by boost pressure correct?

My supercharged M54 is currently at the Doc’s office for this. I hope there is no Pressurization. Hopefully just a defective gasket, it was just recently installed.

[willyworm*]

Bumping this thread up.

I'm having a similar issue right now. Recently was noticing some smoke rolling up from under the hood and I know what burnt oil smells like. It would periodically come and go though. so I figured an oil hose was going bad. Also, I was burning a little more oil than normal. Of course these diesel engines naturally burn a little oil between changes, but the amount of oil I was losing was way more than normal. There were very small hints of a little oil leaking from where I was parking the vehicle overnight. I knew a trip to my mechanic was imminent. My mechanic Kevin has a shop that's about 50 miles away. He's the one that did all my deletes and JR 2.0 tune installation.

I decided to take it to my other friend's tire shop first to have the front brakes addressed before driving it to my mechanic's shop. The shaking when I hit the brakes was getting beyond what I could bear. Upon the road test I think one of the grease monkeys got down on the throttle pretty hard and blew a hose apart that was already on it's last leg. Massive puddles of oil under the car, and obviously my little intermittent problem just became a much bigger problem. Another friend that runs a towing service came got it on his rollback and took it over to Kevin's shop. Yeah, I got friends in low places.

Got a call from Kevin today saying I need 2 turbos and an intercooler, as they are all full of oil.

Little back story here... I got all the hardware and software for my deletes from AARodriguez outside Atlanta. With them having so much experience I figured I'd call Andrew to see what he knew about it. Sure enough without even looking at the vehicle, from what I described to him that Kevin told me, he said a lot of similar year and mileage diesel e70's that have been deleted are having the same issue and that their $159 Valve Cover Gasket kit will most likely solve the problem. He said the gasket hardens over time, becomes brittle, just overall breaks down, and thus pressurizing the crank case pushing oil into areas it typically should not be, namely all the ones listed above.

Not sure if this is gonna fix the root of my issue, but I ordered the VCG kit and had it shipped directly to Kevin's shop. Hopefully this will resolve it and the seals in the turbos aren't FUBAR.

[willyworm*]

Update... after ~$1700 in parts + labor, turbos and intercooler seem to be fine thankfully. Once the new valve cover gasket was installed the oil worked its way out of all the little nooks and crannies, car runs fine.

Apparently the valve cover gasket is a known issue that fails eventually after 100k mi. I made it to 135k. Guess I'm lucky.

Had 2 glow plugs failing also, so I figured the other 4 are likely not far behind. Just went ahead and bought the kit with 6 new ones + controller.

Sent from my SM-G930V using Tapatalk