LBZ: 2007 engine run away [Archive] - Duramax Diesels Forum


View Full Version : LBZ: 2007 engine run away

09-12-2012, 08:03 AM
Hey guys, put together a hard rollover 2007 LBZ Classic last week and it ran away from what I believe to be engine oil in the intercooler. Engine rev'd up and basically just took off to unknown RPM's. I wasn't in the cab so I don't know how high they went. It continued to rev until it just shut off. Now it just cranks and cranks, no fire. Everything sounds fine, no off noises. Engine oil is still full and the turbo is good. What do you think happened and why won't it start?

09-12-2012, 08:07 AM
Melted pistons. And it probably melted the tips off the injectors. I have one here that did the same thing.

09-12-2012, 08:18 AM
Could have cooked the CP3 too.
Check RP while cranking or see if it's got fuel going to the injectors.
And a compression test.

09-12-2012, 08:19 AM
does it sound like its firing at all or just spinning? How do the pushrods look?

09-12-2012, 08:20 AM
So log rail pressure and a compression check. AJ, is the truck you have for sale? If so, add the $250 I owe you to the price and call me. :roflmao:

09-12-2012, 08:21 AM
I have the engine that came out of a truck that ran away on oil. I'm still waiting for a visit and my money!!:hug:

09-12-2012, 08:28 AM
Possibly spun the cam gear also