Mad Mike
Well-known member
I had an 84 Olds Toronado. They shared bore and stroke with the gas 5.7, but they were real diesel designs - just not well tested. The diesel 5.7 used strengthened cast iron, had a fully webbed block, forged crank and rods, diesel heads, cam and tough pre combustion chamber pistons. . They had 2 weak spots - stretchy head bolts and no water separators. In 1984 they were $22,000 cars, about the same price as a Corvette. I bought mine new in 85’ I paid $4200 because by then they were unsellable.I’d forgotten the infamous “diesel” GM put in the Toronado and a whack of pickup trucks . Converted gas engine , what a really bad idea , but they held onto it for six or seven yrs .
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Mine came with a 100,000 mile warranty, blew 2 head gaskets in 20,000 miles. GM did some upgrades at the second rebuild, better head gaskets, stronger deadbolts and a water separator. I drove that trouble free for 100,000 miles after that.
I got about 6l/100 - that was better than my wife’s gas powered Audi 90.

