[Gay State Conservative]

See...there's the key.Japanese engine.The ones that were put into larger Oldsmobiles/Cadillacs were disasters. At least that's what I've read.

[nascarnation]

Yeah the 5.7 was converted from a gasser and had a multitude of problems. Head gaskets, fuel pump system, transmission couldn’t take the torsional vibrations, etc etc.

I did know one old guy at GM who put a gallon of gasoline in every tank of diesel fuel and his ran almost 90,000 miles without failing which was exceptional.

[lapsus calami]

 

 

As usual GM tried to execute a proven concept on the cheap. Competent water separation and particulate filtration wasn't provided, the pumps had low tolerance for bad fuel issues, so there was heat soak and sputter, engine not starting and so forth. Cut corners on the fasteners, which led to main bearing issues and head gasket popping. People have found when you spend some extra time and money reworking the fuel system and getting quality ARP main cap and head studs the engines actually will do well. There are a number of those engines running the roads right now after people corrected the issues GM failed to follow through on.

 

 

[fireman15]

The ones that were put into larger Oldsmobiles/Cadillacs were disasters. At least that's what I've read.

We had the 350 Oldsmobile diesel in our 1982 Cutlass. They came out in 1978 and had some severe reliability issues for the first couple of years. By 82 they had those issues resolved and ours was very reliable, got good fuel economy, and had excellent torque. But the bad reputation caused people to avoid it like the plague. So, it was discontinued. You could basically bolt it into pickup that had a Chevy 350 gasoline engine in it for a cheap conversion to diesel, but ours had over 200,000 mile on it when we bought it and we put another 100,000 miles on it. It just didn't seem like a good idea... unless we were going to keep it for a long time, and I always have too many irons in the fire.