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Old 07-27-2009, 12:47 PM
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GMC 8.2 Diesel

was wondering how hard it is to convert over to gasoline , it a 500 cubic inch V8 , and if it is worth doing

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Old 07-27-2009, 03:58 PM
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Originally Posted by Chevstang
was wondering how hard it is to convert over to gasoline , it a 500 cubic inch V8 , and if it is worth doing
You convert it to gasoline by pulling it out and swapping in a 500 cu in Caddy motor...
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Old 07-27-2009, 11:05 PM
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Good point, Joe. The 8.2 diesel is a behemoth; both in weight and size. Its somewhere north of 1500 lbs, and something like 42" wide X 46" tall.

The caddy 500 is already a bulletproof gasoline engine that weighs only about 40 lbs heavier than a small block chevy.

But... if you wanted to convert an 8.2 GMC: figure out a way to machine/weld/alter a head to have spark plugs, used crazy custom dished pistons, and deal with the fact that no matter how much work you do, those heads won't breathe over about 2800 rpms.
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Old 07-28-2009, 12:44 AM
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In short no, its not worth it.. That is unless you REALLY like your rig a lot..

Im not farmiliar with the 8.2L, but I used to have a 6.2L. I got rid of it and got a Dodge Cummins, I like the Ram much better.. I know that the 6.2L will bolt right up to any typical GM transmission and motor mounts were the same. Cant say for sure about an 8.2L though.

Isnt the 8.2 an old naturally asperated diesel? What rig is it in?

As far as making the switch, it can be done but you would need to re-create everything from throttle linkage to distributor wiring, exhaust system etc.. The good news is you could use your existing fuel tanks and lines. It wont hurt a gasser to have traces of diesel fuel, but the other way around is bad medicine.

For anything less than a rig with extraordinary merits in one way or another, I would jettison the whole rig and get something else.
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