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Convert Diesel to Gas

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by laketex, Jan 16, 2001.

  1. laketex

    laketex 3/4 ton status

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    Whats involved in changing over a 6.2L to a gas engine?



    [​IMG]
    Durant, Ok
     
  2. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    I did this swap, its not that bad. I posted most of what the swap entails before. If you have any specific questions I'll be happy to answer them. a 350 will slip right in, use the same mounts converter. change the governer in the trans and the tv cable, the 6.2s tv won't work, (for a 700r4). the small block fan will even line up perfectly with the diesel radiator shroud. Again, I'll answer anything you want. In my personal opinion, a gas motor is the only way to go......js
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Make sure that you aren't going to be having any problems with emissions and such..each state it seems varies. In ours even diesels go through emissions, so a diesel swap is a no-no if you don't do it the way the DMV says...rr

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  4. Gopherkiller

    Gopherkiller 1/2 ton status

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  5. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    I think we covered this one before because I remember you posting about this before. What is wrong with the Diesel? Does it run? If it running why take it out? Why remove an engine that gets great mileage, can last a few hundred thousand MORE than a gasser, GETS RESPECT, and just kicks a$$!!! If you don't want the K5 give it to me...I will come pick it up before I see someone swap the thing out. I know people that would LOVE a K5 DIESEL Blazer. Since I own one and a guy was talking to me about how he used to own a K5 Diesel and how he would love to have his back...I showed him mine...he just about bought it right there...no...mine Diesel is still in my hands...unless he offers the right money..and then I will get a bigger Diesel K5.

    SK-15
    J**P...it's whats for dinner!
    <A target="_blank" HREF=http://SK-15.coloradok5.com>http://SK-15.coloradok5.com</A>
    Roads? Where we're going, we don't need any roads!
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Because I live in the most highly liberal, and populated, county in my state. People would take diesel vehicles, and put gas engines in them, thus never having to pass emissions. Not a problem in my book, but it obviously was in someone else's. The only positive thing is that they can not look under the hood of the vehicle here, so thats a plus. But a gas engine, as I see it, will NEVER have anywhere near the same type and amount of emissions as a diesel.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  7. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    the emissions comment is correct. What state are you in?? Most states its a joke to get older vehicles to pass, especially trucks, because of the less stringent emissions requirements. I can only attest to NY, my home state which is so socialist we have cameras in our emissions inspection stations. So this is what you do. Keep the truck registered as a diesel, the DMV isn't the wiser, you could have a pro-stock motor in the K5, when you get your registation, it has the code for a safety inspection only. Go to a station that does safety inspections only, they have no cameras, (not that it matters because the hood is never popped, but it keeps things low profile). get your 10 dollar useless state safety inspection, then your legal, a cop doesn't know why you have a safety inspection, all he knows is that the reggy is calling for it. doing these switches in NY is brilliant because the DMV never sees the vehicle. As for your reasons for switching from the diesel to the gas, well thats your call. If you want to run #2 in her for cheap then keep it. But, if you are tired of a slow a$$, stinking, loud, abnoxious truck??? A truck with an underpowered motor, and the 6.2 is. Any average small block can pull just as good, and a 454 makes the 6.2 ......well........look pathetic. I was even all gung ho about my 6.2 when I first got it. But , I learned quick. Having had 6.2s and 350s and 454s, the diesel is the worst combo......gas it you'll love it, by the way any person who takes care of their small block can get just as much mileage out of their motor, thats just as much, 500,000 miles, so thats really not an issue. What tranny do you have??? The 700R4, expect to have that trans rebuilt every 70,000 miles or so with that 6.2, so any money your saving with #2, you'll drop back in the truck because the diesel is blowing stuff up.........been there.......the swap is easy, do it............js
     
  8. pcorssmit

    pcorssmit 1/2 ton status

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    I swapped my 6.2 out for a 350 TBI about 4 years ago, and have no regrets (other than not going with a big block, but the truck was a daily driver at the time). Most everything bolts right up. As far as the 700R4, I would recommend at the minimum using a gas torque converter, tv cable, and govenor. If you have oversize tires, you may want to use a govenor from a police car as it ups the shift points a bit. The diesel converter will work, but performance will suffer. I wish I'd changed mine, stock converters are really not that expensive. In Colorado, I had to have the truck recertified after the conversion, as the smog test diesels here. It didn't cost anything, and I just had to use all the TBI emmisions stuff, ie charcoal canister, cat, and fuel filler restrictor. No smog pump. By the time I figured in maintenance, fuel, and all the oil burning, it really didn't affect my overall $/mile.

    I'm not anti-diesel (my daily driver has a 330 hp cummins), I just think the 6.2 is a turd. If you have any questions, e-mail me or do a search, there was a post within the last week about this swap.

    Pete

    '83 K5, 350 TBI (ex 6.2), Dana 60/14 bolt, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  9. LKJR

    LKJR 1/2 ton status

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    well guys the post was mine just didn't know that laketex was logged in when I posted it. The blazer is one I'm looking at in austin for a really good price. But it has a 6.2 that is seized up so it has to have something done. I've got a small block I started the tear down on today so probably a stroker kit and make it a worthwhile swap. so there it is....... will post more later

    Like em big and topless
     
  10. baldbandit

    baldbandit 1/2 ton status

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    I'm in the process of doing this now. The diesel is out and i'm going to start back in with the 350 tomorrow. I have a few questions! Will the brackets for the power steering work on a 90 model small block? If not, i'll have to swap the breaks over to vacum. Will the standard shift flywheel work on the 350 or will i have to get another one? I don't really want to buy one because as soon as i recover from having to put a motor in, i'm going to to put in an automatic tranny (its a 2wd truck).

    thanks
    baldbandit
     
  11. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    ok on the brakes, do not even consider vacuum brakes, because the hydroboost set up is far superior. no the 6.2 brakets wil lnot work. This is what you do, find a regular 350 power steering pump, press the pump out of it, then press your hydroboost pump out of the diesel bracket, then put the diesel pump from the 6.2 in the 350 bracket......WALA. bolt her on and you have brakes. As for the flywheel, it absolutely will not work, thats for a diesel motor, you need an internally balanced one for a one piece rear main seal, (I assume its a 1 piece because you posted its a 90)....you need a gas flywheel................js
     
  12. baldbandit

    baldbandit 1/2 ton status

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    what about the part of the motor mount that bolts to the block and actually slips over the rubber mount? will these fit on the 350 or will i have to find some from a 350?

    thanks
    baldbandit
     
  13. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    when you lift the oil burner out of the truck and slide the gasser in it, the motor mount on the 350 that is actually on the motor slips right over the "chassis mount" that is on the frame, just run a bolt though and your good, I don't remeber there being what you are trying to describe, essentially the motor will bolt into the carriage of the K5 as if there was always a gas motor there.....................ok??? by the way what year are you doing?? mines an 83...........js
     
  14. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    I reread your post.....now i know what you mean!!! I do not know that answer because I had a complete motor with the mounts on it already......you can find small block mounts anywhere....or take off one of the 6.2s then go to the parts house ask them for a 350s, then match it up............ok........js
     
  15. rezalb

    rezalb 1/2 ton status

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    I have a 83 K5 that had a 6.2 clanker in it,doner 1979 Suburban I purchased complete with a 1993 model 454 TBI, TH400, 203, 14 boltFF so on. See the post I made with my conversion on 6/23/00 at 10:42pm with all the crap. I CANNOT get the 700R tv cable to mate with the TBI. So now (I Think For the Better) am changing to the TH400 and 203. A few more months and it will be a year my K5 is MIA......
    THINK REAL HARD.........

    Built for a purpose.
     
  16. rezalb

    rezalb 1/2 ton status

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    I have a 83 K5 that had a 6.2 clanker in it,doner 1979 Suburban I purchased complete with a 1993 model 454 TBI, TH400, 203, 14 boltFF so on. See the post I made with my conversion on 6/23/00 at 10:42pm with all the crap. I CANNOT get the 700R tv cable to mate with the TBI. So now (I Think For the Better) am changing to the TH400 and 203. A few more months and it will be a year my K5 is MIA......
    THINK REAL HARD.........
    Any questions email me and we can talk on the tele..

    rezalB


    Built for a purpose.
     
  17. pcorssmit

    pcorssmit 1/2 ton status

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    I've heard that the 454 SS pickups used the 700R4 w/ the 454 for a couple years. The first year was '90, they had TH400's. Try a '91 or '92 for the tv cable and bracket.

    Pete

    '83 K5, 350 TBI (ex 6.2), Dana 60/14 bolt, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  18. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    smit makes a good suggestion, I would also try any 454 TBI truck that came stock with a 700. You may want to also call tranny shops and hot rod shops and pick their brains, holley or edelbrock might even make a bracket or linkage or something, try them too.......js
     

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