Cummin's anyone?

[93hummer]

12 valve cummins are great engines, a few have been reported to have gone over a millon miles, there was one that was even verified by the turbo diesel register. This one was an 89 and it was used to deliver new travel trailers from the factory in Indiana to locations all over the lower 48.

The only thing to fix while it is out is the KDP otherwise known as "Killer Dowel Pin", basically a dowel pin in the timing cover whose hole was machined to mmuch from the factory. In some cases the lin falls out and gets into the timing gears (there is no chain) and can eat up the teeth and bust the timing cover. Do a google search for cummins KDP.

It also has features such as a deep skirt block, meaning the block extends below the centerline of the crank, one reason it weighs so much more than a 6.2L. If a 6.2 had that feature, cracked blocks would not happen!

And my favorite comparison of all time, the 6.2, 7.3 and cummins rod comparison:



I personally would love to install a 4 banger Cummins diesel in the Hummer and turn it up. More power than the 6.2, easy to turn up, and the 4BT will weigh about the same and give better mileage. the truck pullers and diesel drag racers use two and three turbos to cram 75+ PSI down these engines and they live, they do tend to spit out thier cranks at about 125 PSI though. What an amazing engine, one racer who was using twin turbos, nitrous and propane in his was quoted as saying "you could feed this engine hand grenades and it would live".

I will get by on 6.2's for now because they are cheap, but good cores are already getting scarce.

There are many who have done chevy swaps, there is a swap forum over at http://www.turbodieselregister.com/forum...nversions/