GM's New V8.... Lets see how this one works out!

[steved]

my pop had one [before i was born]... until it broke a rod. . then it got a 350 gasser. .



we've had that 5. 7 and 6. 2 & 6. 5td diesels. . we had a 4. 3 v6 aluminum head diesel too in a cutlass sierra front wheel drive... heads were warped on it as gm engineers had their heads up some horses back end and set the thermostat on the cooling fans way too high [+200°f]. .

Learn something new everyday!



I know the 6. 2L was a fairly reliable and economical diesel in its time... it did have some head cracking and glow plug issues but, when you got one to hold together, they would provide as good or better mileage as a 1st gen Cummins. Friends of mine had a blazer with a 6. 2L... it did suffer a cracked head at one point, but it also had 235k on the ticker and still provided mid 20s on the highway!



The 5. 7L were a very economical engine, but they were just not a diesel, and could not hold together. A college guy had one tht reliably got him 25mpg on the daily commute to school.



steved

 

[MMichaels]

The next DMax has some good features IMO. Having OHC should help with the heat issue since it means short exhaust ports. I am wondering if what they mean by no exhaust manifold that maybe the turbo inlet is integral to the exhaust manifold, ie it's one piece, and with it removed you would still have exhaust ports.

The Cadillac V16 had intake and exhaust on the outside of the engine, two sets of intakes & exhausts #ad
The Cadillac V16 was amazingly innovative and ahead of its time, had cast iron cylinders integrated in pairs with lifter assemblies mounted in an aluminum block. . . probably the most mass-produced aluminum engine of the day.

That first-series V-16 (452) is just an amazing piece of technology! I've got a friend who has one and it's got to be the smoothest engine ever...

 

[RHestand]

The next DMax has some good features IMO. Having OHC should help with the heat issue since it means short exhaust ports. I am wondering if what they mean by no exhaust manifold that maybe the turbo inlet is integral to the exhaust manifold, ie it's one piece, and with it removed you would still have exhaust ports.



The Cadillac V16 had intake and exhaust on the outside of the engine, two sets of intakes & exhausts #ad
The Cadillac V16 was amazingly innovative and ahead of its time, had cast iron cylinders integrated in pairs with lifter assemblies mounted in an aluminum block. . . probably the most mass-produced aluminum engine of the day.

Vaughn,

Thanks for that link, that's what I was talking about, but I didn't remember that it was a V/16. What a beautifull engine.

I didn't get to hear one run, but with 16 cyls. , it would have had to sound great.

Thanks again, Ray

 

[Vaughn MacKenzie]

Actually, GM did convert a gasser into a diesel... it was a 5. 7L and primarily found its way into cars of the early 80s... typically Olds and Buick land barges.



The diesel used in the trucks was an actual Detroit, but it was the naturally aspirated 6. 2L... I don't think they ever made a 5. 7L for the trucks, at least not that I'm aware of...



steved

The 5. 7 wasn't truly a "gas conversion" since it had a different block (although it was basically a super beefed up 350 block). The crank & rods of course were much heavier (3" main journals vs. 2. 5" on the gas motor) and different heads of course.



If it wasn't for a couple of major engineering gaffes by GM the 350 could've been an OK motor (other than being abysmally gutless). GM went cheap and didn't want to retool to put 6 head bolts around each cylinder & instead stuck with 4 so they could be built on the same assembly lines as the gas engines. The result- blown head gaskets galore. Second major screwup was way too short of main bearing bolts so these snapped regularly. Compounding things was chronically very bad diesel and idiots who had no clue how to treat a diesel.



The V6 engines were actually a lot better (except for the FWD version) and had far fewer issues, mainly since they did do the blocks right by doing 6 bolts per cylinder.



Vaughn

 

[CumminsBu]

I'm looking forward to this engine coming out primarily in the Suburban, and hopefully we will see this engine in the Marine side of the house.

The Cat D-398 Has the exhaust in the valley and the intake on the outside of the heads. A true twin turbo too, one for each bank.