2007 E320 Bluetec Turbo Failure/Repair
 

I just completed repairing my turbo charger on my 2007 E320 Bluetech, which had failed catastrophically on a recent trip. The car began to leak oil badly after the failure and I ended up having to trailer it home. I fear that both the intake and exhaust have become badly oil fouled. Upon starting it after the turbo was repaired, after about a 30 minute idle, it began to smoke and began to runaway with itself - turning off the key did not immediately stop it, but it finally died a few seconds later. Not sure how high it revved. I believe the runaway was caused by oil in the intercooler that vaporized. During inspection I noted the electric fan was not completely plugged in and threw an inoperable trouble code .

Started it up the next day and have checked the turbo, and no apparent damage noted.

The question I have is there someway to clean the oil and oil residue out of inlet without dismantling it?

I can't help with your question but I am curious if you rebuilt or just replaced the turbo. I suspect mine needs rebuilding after 250k miles and I have been looking at some of the rebuilt kits.

Yes, the turbo failed catastrophically shortly after I had changed the oil cooler seals. I suspect I did something wrong on the reinstall? So I bought a Chinese core and rebuilt it. I have cleaned the intercooler, which had a lot of oil in it, and now I have concern for the exhaust/DPF. It smokes pretty badly now, and I am hoping that driving it will burn it out? I am seeing 22 psi exhaust back pressure at idle now, and am afraid the DPF may not clean up by driving?

I think I would be looking for a used exhaust system parts. Someone's car out there got Bady wrecked but the exhaust system is OK.

Anything that can be removed and put into a hot cleaning tank can be cleaned. In the old days people took their parts to places that did that.

The 22psi is minus 14psi atmospheric pressure so you actually have 8psi at idle, the ecu would have flagged it up as to high if it was actually 22psi
I would just drive and put about a 100 miles on it and it should clean itself up, if it doesn’t then get a good code reader and force a regen on the dpf.
I am presuming the reading is same as if it was boost pressure in that atmospheric is taken off ?