gas to diesel conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mmusmanno · 02-08-2008, 10:16 AM

Arveetek, what did you do to your 6.2 to make it a powerhouse? and also, what do you think about a '92 chevy g20 van with a 6.2 as a donor?

arveetek · 02-09-2008, 12:22 AM

Those of you interested in the 6.2L/6.5L family might like to see this website:

http://www.optimizer6500.com/

As far as what I did to my engine, in a nutshell: lowered the compression by topping the pistons, boring the engine to .040" over, installing 6.5L turbo injectors, having the injection pump rebuilt to 6.5L turbo specs, installing a turbo off a 7.3L Ford diesel, and installing 4" exhaust. With all this work, it pulls about the same as a late 90's Powerstroke diesel, which I think is pretty good.

Here's a thread following some of my build-up:

http://67-72chevytrucks.com/vboard/s...d.php?t=141204

Looks like I never really finished up the story, though. I'll have to write that later.

Also, www.thedieselpage.com is a great resource for GM diesels and conversions.

The engine from that van would work just fine, but the other accessories like the radiator and brakes will be different than the truck. You might be better off finding a truck in your body style so you can get all the other stuff you need.

Casey

mmusmanno · 02-09-2008, 04:12 AM

since i'm having a local mechanic do most of this, here is what i'm thinking. instead of buying an old donor and using old parts and getting an engine that will need much work to make it the workhorse I want. and, since i'm slowly going to totally restore the truck and put a lot of new parts in it anyway. and, since you have done this and could probably give me a list of exactly what parts i'll need to buy, i'm thinking, I take my truck to the mechanic, who specializes in rebuilding engines. get him a old 6.2 for him to start with and make it that bad to the bone powerhouse, then order everything I need from either lmc or whatever place will sell it, based on your list. and replace all the parts I need with new ones. I want to have the drivetrain worked on as well, all the seals, joints, anything. this way I don't have to buy an old donor and literally rebuild everything on it, to put into my truck. and my truck will be on its way to being restored. i'll be doing the interior and body. one last thing, what about emissions? since the truck wasn't originally a diesel, will that be a problem in PA? i'm planning on running biodiesel in it, there is a station about 20 minutes from my house that I can refuel anytime. does that effect emissions? so, Casey, tell me what you think? thanks. Mike

02-08-2008, 10:16 AM	#1
mmusmanno Registered User Join Date: Feb 2008 Location: warminster, pa Posts: 7	Re: gas to diesel conversion Arveetek, what did you do to your 6.2 to make it a powerhouse? and also, what do you think about a '92 chevy g20 van with a 6.2 as a donor?

02-09-2008, 12:22 AM	#2
arveetek Ultimate Diesel Dude Join Date: Oct 2002 Location: Southwest Missouri Posts: 328	Re: gas to diesel conversion Those of you interested in the 6.2L/6.5L family might like to see this website: http://www.optimizer6500.com/ As far as what I did to my engine, in a nutshell: lowered the compression by topping the pistons, boring the engine to .040" over, installing 6.5L turbo injectors, having the injection pump rebuilt to 6.5L turbo specs, installing a turbo off a 7.3L Ford diesel, and installing 4" exhaust. With all this work, it pulls about the same as a late 90's Powerstroke diesel, which I think is pretty good. Here's a thread following some of my build-up: http://67-72chevytrucks.com/vboard/s...d.php?t=141204 Looks like I never really finished up the story, though. I'll have to write that later. Also, www.thedieselpage.com is a great resource for GM diesels and conversions. The engine from that van would work just fine, but the other accessories like the radiator and brakes will be different than the truck. You might be better off finding a truck in your body style so you can get all the other stuff you need. Casey __________________ Project truck: '81 C/20 converted to 6.2L TURBO DIESEL bored .040", gear drive, 6.5L injectors/pump, custom pistons, custom 4" exhaust, 700R4, 4.10's Daily Driver: '95 K1500 Tahoe, 6.5L TURBO DIESEL, NP241, 4L80E, 3.42's Last edited by arveetek; 02-09-2008 at 12:28 AM.

02-09-2008, 04:12 AM	#3
mmusmanno Registered User Join Date: Feb 2008 Location: warminster, pa Posts: 7	Re: gas to diesel conversion since i'm having a local mechanic do most of this, here is what i'm thinking. instead of buying an old donor and using old parts and getting an engine that will need much work to make it the workhorse I want. and, since i'm slowly going to totally restore the truck and put a lot of new parts in it anyway. and, since you have done this and could probably give me a list of exactly what parts i'll need to buy, i'm thinking, I take my truck to the mechanic, who specializes in rebuilding engines. get him a old 6.2 for him to start with and make it that bad to the bone powerhouse, then order everything I need from either lmc or whatever place will sell it, based on your list. and replace all the parts I need with new ones. I want to have the drivetrain worked on as well, all the seals, joints, anything. this way I don't have to buy an old donor and literally rebuild everything on it, to put into my truck. and my truck will be on its way to being restored. i'll be doing the interior and body. one last thing, what about emissions? since the truck wasn't originally a diesel, will that be a problem in PA? i'm planning on running biodiesel in it, there is a station about 20 minutes from my house that I can refuel anytime. does that effect emissions? so, Casey, tell me what you think? thanks. Mike



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