I have owned a pair of 6.2 diesel suburbans, no real complaints save the crappy 700r4 transmission. The 6.2 was not a pseudodiesel and the 350dx was not really one either. The main issue with the 350dx was a lack of a fuel water separator and water sensor; any water and you blew the injection pump and heads. My father owned a 79 350dx diesel and once the goodwrench went in the thing went forever, the guy who bought it from him in 91 still has it on the road, go figure.
A suburban can hit around 30mpg on the highway with a 6.2 and a 5sp manual but high 20's are more common in that combo. My 700r4 6.2 delivered 26mpg until it crapped out.
The main weakness of the 6.2 is that it has a cast iron crank and that is where most of the failures come, if GM would have pulled its head out of its arse during the 5.7 fiasco they would have realized that saving $25 to cheap out on something critical wasn't worthwhile.
Ah well.
Quote:
Originally Posted by max_frontal_area
oops, 148HP was the L6 with aluminum head that came in the 86 300SDL
the turbo in the OM617 was too small. at high, sustained rpms it works like a blow drier and without intercooler your mpg will suffer.
the earlier (70s) burbs came with the 350 IDI which GM put in their vans as well. years later in the newer model they fitted them with the 6.5 IDI, they might have also used the 6.2 but i am not sure. yes pseudodiesels can be terrible as in the case of the 350, but quite good too as in the IDI VWs.
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