I have a 1997.5 Hummer 4 door Hard top and just replaced the injector pump and turbo. Now it is spewing oil out the exhaust really bad going down the road, Anyone have any ideas what may be going on? The truck has 74K on it.

 

I moved this out of the archive only section for drive trains out to the H1 forum for someone to see it and pitch in.

Good luck.

 

Blown oil seal in the turbo or a blown motor

 

More then likely a blown seal in the turbo. If it was coming from a blown motor, it would t be coming out of the exhaust. If it is fresh unburnt oil, then I would bet a case of beer that it is turbo related

 

Actually I've seen it go both ways, both turbo and non turbo 6.5's in H1 blowing oil out of the exhaust and still run and drive. Further tear down always showed a hole in a piston. However the 6.5T's it wasn't as common, I would guess stronger internals to handle boost so you're most likely right on it being the turbo.