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Thread: 6.2L what too look for

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  1. #1
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    6.2L what too look for


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    I've been looking around at the oobs chevy m1008s and was wondering what problems i should look for with the engine and anything else when looking at these trucks. any help would be greatly appreciated thanks.
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    Re: 6.2L what too look for

    bump
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  3. #3
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    Re: 6.2L what too look for

    glowplugs, make sure the controller works when you turn the key on, and it should start rather easy.

    glowplugs are PITA to replace and the controllers always go bad.

    other than that. look for white smoke
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    Re: 6.2L what too look for

    alright thanks a bunch. and chances are the trannies are most likely good in them even thought they have been sitting right?
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    Re: 6.2L what too look for

    oh yea also what kinda power increments could i get out of one with exhaust and cold air intake?
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    Re: 6.2L what too look for

    wouldnt worry about power upgrades, just keep the fuel and air filters clean. Possibly convert the factory box filter to a spin on NAPA kit.

    The M1008 I am working on currently had been parked since 2000, all I did was add 2 fresh batteries and 5 gallons of fresh diesel.......started right up. The factory glowplug controller fried out and was replaced with a ford starter solenoid and a momentary switch, Count to 20 and turn it over to start.
    Last edited by Black06; 12-07-2009 at 09:03 PM.

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    Re: 6.2L what too look for

    alright great. how many miles and what kind of shape was yours? and if ya dont mind me asking howmuch did you pay?
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  8. #8
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    Re: 6.2L what too look for

    I'd hold out to get the serpentine equipped engines from the late 80's but it seems you'll be picking up a j-code engine, which is much better than the civy version.

    Less emissions and less problems the 6.2L is no powerhouse, but i truly do like the engine. It was slow, so it kept me out of trouble with the local police. Had plenty of towing torque, you don't feel it too much unloaded, but it feels exactly the same even with a load aboard.

    I was able to tow my 98 home with my K5 w/6.2L just above idle all the way home through town, uphill, etc.


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    Re: 6.2L what too look for

    alright thanks yeai been looking at em for a while now just waiting on the right time to grab one. theres one on craigslist for $2500 i could probably haggle down to less. it has 64,000 miles bodys in decent condition but definately will need work and interiors a little beat up but nothing terrible. figure if i got it id throw a 6 or 8 inch on it and some 38s and try squeezing 20 mpg out of it. id end up saving a ton of money compared to the 13.7mpg i gettin now
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    Re: 6.2L what too look for

    With the right gearing to fit with the tires, i don't see it being impossible to get 20mpg. I was able to squeeze some good numbers out my 6.2, even with 31's and 3.42 gears.

    I think the m1008's come with quite low (numerically high) gears anyway, so you should be fine. Alot of people give these engines flack, but they've been in the military spec Hummers since they've been released and only upgraded to 6.5L TD just for more power.

    if it's good for the Hummers, then it's good for me, i say :)


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    Re: 6.2L what too look for

    M1008 trucks come with 4.56 gears...and a TH400 trans.

    Its near impossible to drive one of them trucks on the road because they top out at 50mph ...thats with your foot to the floor.

    they make awesome mud trucks though, they already have 4.56's...and a locker in the rear...in some cases they had front lockers but that seems to be rare.

    6.2..TH400....14BFF....D60 front....about the most bulletproof setup ever. 6.2 being the weakest link
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    Re: 6.2L what too look for

    Quote Originally Posted by crossy's son View Post
    M1008 trucks come with 4.56 gears...and a TH400 trans.

    Its near impossible to drive one of them trucks on the road because they top out at 50mph ...thats with your foot to the floor.

    they make awesome mud trucks though, they already have 4.56's...and a locker in the rear...in some cases they had front lockers but that seems to be rare.

    6.2..TH400....14BFF....D60 front....about the most bulletproof setup ever. 6.2 being the weakest link
    Slap an NV4500 or even an SM465 in there and it would be much better. the 6.2 isn't the greatest but maintained correctly it won't let you down.

    Mine still starts up even after sitting for 2 years good ol beast


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    Re: 6.2L what too look for

    yea with that ratio and 38s ill be able to cruise at more that 50. the only reason you cant get over 50 with em is beacuse that low gear ratio with the 31s that come with it right?
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  14. #14
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    Re: 6.2L what too look for

    Quote Originally Posted by elsurfo10 View Post
    yea with that ratio and 38s ill be able to cruise at more that 50. the only reason you cant get over 50 with em is beacuse that low gear ratio with the 31s that come with it right?
    Yeah, with a bigger tire, you'll end up right around where it will be good to cruise.

    Sounds like you won't need to be doing alot of cruising with this truck anyway. Sounds like it'll be a fun/playtoy that sees occasional road use. I'm not sure many people would want to daily a truck with 38's. I know of a guy who does with his Suburban though (with 454) but he's got money to burn.


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    Re: 6.2L what too look for

    SM465 is 1:1 4th, like the TH400.

    There will be a harldy noticeable difference between the two...

    NV4500 however is a sweet idea
    Currently-
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    -91 Dodge 350 4x4 12v Cummins/5spd 384hp/802tq


    SOLD and missed-- 91 RCSB GMC, restored Black on black, 2/4 drop, 17x9 Torq thrusts, built 350tbi, 5 speed w/hurst shifter, 3.42 G80--- Over 400,000 miles on body

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    Re: 6.2L what too look for

    i probably wouldnt use it as a daily driver until i sold my suburban if i do. i planned on getting this truck working on it like with lift and all then once its done sell my burban and use the m1008 as a dd. even with 38s it blows my gas mileage away with my burban which has 3.42s and 35s.
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  17. #17
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    Re: 6.2L what too look for

    I say a 4L60 (no E) would stand up nicely behind the 6.2L. I'm not sure if they were offered in the 88-94 FSC's with the 6.2. A little better than the 700R4 (basically the same damn thing but with minor improvements).

    They have a great gear spread for a 4-speed auto, plenty of parts and upgrades. The 6.2L doesn't make enough torque to kill it, unless you beat on it or generally mistreat it. But if you're dead set on 38's then i'd stick with a TH400 or even better, 4L80


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  18. #18
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    Re: 6.2L what too look for

    well somehwere around therei mean i eather looking to put a 6inchor 8inch i mean 6in is half the price and can still clear 37s eaisly and maybe 38s so id have too search for somedeals. i was thinking some 37inch km2s would look sick
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  19. #19
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    Re: 6.2L what too look for

    The M1008's came with 3.73's.... the 5/4 ton trucks came with 4.56's.

    My M1008 has 3.08's and they kept the factory spool, plus the 35's it'll do 70-75 and maintain an 18 mpg average.

  20. #20
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    Re: 6.2L what too look for

    M1008's never came with 3.73's...... 3.08's in a 10b rear with a 10b front. G80 in the rear. TH400 trans.
    Currently-
    -91 RCLB C1500 silverado 4.3L 5 speed GU4 G80 beater truck
    -91 Dodge 350 4x4 12v Cummins/5spd 384hp/802tq


    SOLD and missed-- 91 RCSB GMC, restored Black on black, 2/4 drop, 17x9 Torq thrusts, built 350tbi, 5 speed w/hurst shifter, 3.42 G80--- Over 400,000 miles on body

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