VGT blown right the hell up..

DamageINC · October 12, 2007

Got an '05 F550 in with more crap in the back than I've ever seen attached to one vehicle. He put F-750 badges on the fenders because, as he tells us, it was necessary in order for the vehicle to pass inspection because of it's weight rating or something...

...either way, it's a manual trans 6.0 with absolutely no power whatsoever. After determining that EGR was working fine, and, although no boost was being created, I could tell that the VGT vanes for the most part were moving just based on the way the engine would run and ebp differences at various rpm's would change drastically when VGT duty cycle was commanded differently..

Pulled the turbo to find one of the turbine fins completely missing, exhaust housing was chewed up bad, tons of shaft play, I pulled it apart to find that one of the VGT vane pinions was busted off, every fin on the turbine is torn up bad, the vanes all look like they came out of a concrete mixer... pretty strange failure. Only thing I felt stupid about was that it was almost locked solid, so if I'd just tried to turn it by hand once I got the inlet tubing off I'd have saved myself a lot of "what the hell" self-questioning, hehe.

Hotline's telling me to replace the turbo and the oil feed line, but I honestly don't think oil delivery was an issue here, if you ask me these turbos get WAY more oil than they actually need and statistically, over-oiling causes far more problems than under-oiling.

Anyone here seen this one before??

Dave

Keith Browning · October 12, 2007

As a matter of fact...

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OHNO60 · October 12, 2007

KA-BOOM

mchan68 · October 12, 2007

I got one that just came today that I replaced the turbo about a year and 15,000 kms. ago. The complaint is "oil all over the place". I haven't gotten to it yet (because I'm swamped with work right now), but after taking a quick glance under the hood, there does appear to be fresh oil residue on the underside of the hood near the area where the turbo sits. Customer also complains of oil coming from the CAC rubber hose connections. I'm thinking the oil seals let go. Am I on the right track? Anyone seen this type of failure before, especially on a replacement turbo? Just for your info, I did replace the drain tube with the update, not that it should make any difference.

Tony302600 · October 13, 2007

we had a early 03 p132b p2236 code wouldnt learn turbo position, customer pay, take that bad boy apart, looked like yours keith.

LARRY BRUDZYNSKI · December 26, 2007

Did we ever figure out the cause of the failure on this turbo, I just had one come thru the door that looks just about the same. The only difference is that it looks more like cavitation or small holes on the vanes,and didn't break the pins. I have seen this only on one other turbo in my days and it was on a marine engine that had the cooling system leak into the hot side and the steam beat the hell out of the turbine wheels and housing on the hot side, but that was probably 8-9 years ago on a 8.3M300hp Cummins. Could this be possible on the vgt turbos? Oil cooler failure maybe? Could steam/coolant leaks do this type of damage on the 6.0?

I will try to get some pictures and post them tomorrow....

DamageINC · December 27, 2007

ACtually, I recently had a badly blown EGR cooler that leaked a ton of coolant.. you could actually see in the y-pipe up to the turbo where the coolant sould travel, all the way into the turbo and completely ate away at everything in the tirbune housing. Fins, vanes, and bearings were corned.

Dave