converting deisel truck to gas
 

what all is involved in this???

i located a 82 or 83 4x4 short bed truck in good condition, but it was a deisel, and now the motor is out (blown head gasket or something like that)

i know i'll have to drain the tanks (dual tanks), and maybe change the filler neck, but what else?

what all will i need to do to convert it to gas?...

by the way, it supposedly has a 700r4 :crazy:

i'm getting it without a motor...incase ya hadnt figured out that one

??????


-bigarmzz-
:metal:

If it's '82 or newer then it would be the 6.2 diesel, which should not be a bad swap. '81 was the last year they put the 5.7 Olds diesel in the trucks, but I don't think they put them in the 4x4 trucks anyway.The 6.2 trans will bolt right up to any Chevy V8, just use the flywheel for the gas engine. The motor mounts should also bolt up. Exaust, of course would have to be hooked up. Some of the 6.2 diesels used an electric fuel pump, but I'm not sure which years had it. That may need to be removed, if it has one. The filler necks should be fine. The power wire for the inection pump should hook up to an HEI distributor. Oil and temp sender units from the 6.2 should work, but there might be some adapting required to fit them on some gas engines. Simply abandon the glow plug system completely. The diesel radiator should be big enough for even a big block gas. The diesel probably has hydro-boost brakes, just use the diesel PS pump with the gas ps brackets. I'm sure I forgot something but I think that's the biggest part of it anyway. Hope that helps, best of luck.

60-66 Nut

wow, thanks man...very informative

so did they actually put a 700r4 behind a diesel?...i didnt think chevy did that...i thought all automatic diesels had a big buffed up 400 turbo


-bigarmzz-
:metal:

My '86 1/2 ton 4x4 has O/D as did the '83 I looked at not so long ago.

4L80E? There aren't mnay OD's out therer that were made at the time to handle diesel torque.

I'm pretty sure mine is a 700r4. I not sure but I thought the 4l80e started in '88 with the change in the body?
I always wondered if the diesel 700r4's were a better built tranny because of that, but from what I'm told, its the same except TC and the solenoid(sp).

Just a note,the tourque convertor also needs to be changed,as a gas convertor has a higher lockup point.The P/S takes a bit of ingenuity,as the hydroboost takes a different bracket than regular p/s.My suggestion would be to find the whole setup in a gas truck.Yes,they did put 700r4 trans behind those diesals.Their not to stout,but then again,neither was the 6.2.

The US Army had a boatload of 6.2l diesel engines with OD trannys. They are out there.

Yep, the 700R4 was introduced in 1982 the same time as the 6.2L diesel. Nearly all, if not all, 1/2 ton automatic diesel pickups, Blazers, and Suburbans, whether 2WD or 4WD, came with the 700R4. Nearly all 3/4 ton and 1 auto diesel pickups and Suburbans came with the TH400. The SM465 manual was offered in either the 1/2 ton or 3/4 ton, 2WD or 4WD. Some early 6.2L diesel 1/2 tons also had the NP833 4 speed manual with overdrive, but they're kind of rare.

In 1991, I believe, the 4L80E was introduced behind the diesel. Then the NV4500 came out as the manual option.

The TH350 was never offered behind the 6.2L from the factory. However, a lot of 350 and 400 trannies have been swapped in over the years to replace a failed 700. A lot of the early 700's, as you well know, were not that great and failed often.

So, basically, the light duty trucks had the 700, and the heavy duty trucks had the 400.

My suggestion? Put a diesel back in that truck and enjoy the benefit of hight torque and great fuel economy! :D

Casey