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chevy diesel 6.2L

Discussion in 'Chevy Trucks' started by Milwaukee, May 19, 2009.

  1. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    Well found nice 1983-1988 HD K20 K30 4wd ex army with 6.2L for good deal so I would ask you if it good

    question what hp and torque for 6.2L diesel

    Can I run any oil in gas like vega oil automatic transmission oil something that is fuel or it strict?

    How they do with automatic transmission?

    What mpg they been average?

    Do they have hard time start in winter?
  2. miltonplower

    miltonplower Senior Member
    from ontario
    Messages: 160

    there good in the snow i have a couple of them they push snow well and have lot's of power i would buy one :)
  3. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Just keep in mind when the Military get's rid of something it has multiple problems if not worn out!
  4. pmorrissette

    pmorrissette Senior Member
    Messages: 175

    If it's a non turbo 6.2, they usually run around 170 HP, which is not so much; but they have great gobs of torque which is great for slow speed pushing.

    Head gaskets are somewhat vulnerable. Watch for white smoke when you test drive it...do a nice long test drive t get the engine really warmed up. They are a biitch to start when very cold if the glow plugs don't work. Many people start them with starting fluid to save a few hundred bucks on a glow plug repair...which doesn't help the head gaskets.

    Run a good quality diesel specific oil...I like Chevron Delo 400...it stays quite fluid even at low temps and makes cold cranking easier.

    If you have a garage, that's even better...start it when you leave, and shut it off when you come back inside...

    The military spec 4x4 drive system on those old trucks is bulletproof...no pun intended!
  5. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    gear ratio on army is 4.62

    Ok I can see why they sell for cheap

    Look like I need think before pick first diesel truck.

    No turbo I look at pic.

    That why I like this chevy because solid axle NO IFS

    Ok 6.2L like to be warm instead cold what about engine block heater?

    How hard to replace head gasket? Like gas engine?
  6. pmorrissette

    pmorrissette Senior Member
    Messages: 175

    Test drive it first, if it has low miles, it may be worth the price they are asking...I have IFS on my '92 GMC Sierra 1500 and run a 7.5 meyer setup...it works great...but the solid axle is easier to lift if you want extra ground clearance...

    Head gaskets are harder than a gas engine (a bit). Be sure to get the heads pressure tested and resurfaced before reinstalling, otherwise you'll be putting a weekend's work down the drain...

    A block heater helps if it has one, if not pretty easy install, also think about getting a couple of battery warmers (it should have two batteries), and make sure it has been converted to a standard 12V system rather than 24V which the military likes. 24V alternators & starters a quite expensive. I am not sure if all MIL-SPEC K20's were 24V or not, but I've seen quite a few that were...

    Good Luck.
  7. BigLou80

    BigLou80 Senior Member
    Messages: 558

    you are very confused about the military, they often get rid of brand new and hardly used stuff, so they have an excuse to get more money from congress. I have been to a surplus warehouse when I worked for the GOV'T its mind blowing what they have to give away.
  8. BigLou80

    BigLou80 Senior Member
    Messages: 558

    I would love to have a 24 volt truck, I think the conversion is long over due. Think of all the charging problems it would solve if everything instantly needed 1/2 the amps? we could really speed up a plow with 24V motor
  9. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Hummm the vehicle is 21 years old? It's a B/S GM diesel. It's a Military Vehicle that has God knows how many drivers. I have a friend that went thru 2 years of High School auto mechanics vocational training with me. He went into the ARMY after high school as a mechanic. He needs a few wrenches and a flat parking place to replace a Hummer's starter. He told me to never buy a used Military Vehicle. They have multiple problems or deferred repairs when they decide to red line it.
  10. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    Mick is right

    most time they sell say not running or didn't try start

    Some are running but cost more for bid.

    vary 30,000-150,000 miles

    I have see some that look like it been sit for long time but sell for really cheap

    I find those at http://www.govliquidation.com/
  11. tuna

    tuna Senior Member
    Messages: 488

    All 6.2`s are non turbo I think they are @ 140 HP.They will run on ATF ,can run veggie they are not big on power but they will plow.They are known to have glow plug trouble and can be tough to start in the cold.Check the block where the starter bolts on I have seen a couple that the starter bolt bosses broke off.
  12. sparky8370

    sparky8370 Senior Member
    Messages: 234