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Putting a 6.5 in a 84 blazer?????

Discussion in '1982-Present GM Diesel' started by braunm, Jan 7, 2002.

  1. braunm

    braunm Registered Member

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    Is it worth the work to put a 6.5 in place of my 6.2? it is a stock m1009 blazer. Soon I will have a 14 bolt and a 60 and a 4" tc lift with 36" tires. Any help would be appricated.

    Thanks

    Mike
     
  2. Tybee

    Tybee 1/2 ton status

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    I was thinking about doing the same when my 6.2 dies

    1984 GMC Jimmy 379 diesel, 700R4, 3.73s, 31x10.50 x 15
     
  3. Corey 78K5

    Corey 78K5 1 ton status

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    From what I have heard a 6.2 with a Banks turbo and exhaust will out power the 6.5
    Corey 78K5
     
  4. Tybee

    Tybee 1/2 ton status

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    6.5 turbo or 6.5 NA?

    1984 GMC Jimmy 379 diesel, 700R4, 3.73s, 31x10.50 x 15
     
  5. DieselDan

    DieselDan 1/2 ton status

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    6.5's have improved (bigger=more power) valves, redesigned prechambers, stiffer bottom end, improved cooling, (later style) oil cooled pistons. Naturally aspirated the do have a slight performance advantage (but a 6.2 will have better mileage). The real advantage arrives when they're turbocharged, where extra beef and cooling allow more boost/load.

    By the way: M1009, one ton axles, 6.5 OOOOooooohhh yyaaa!

    Real trucks don't have spark plugs!
     
  6. Tybee

    Tybee 1/2 ton status

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    What tranys can you put behind the 6.5?


    1984 GMC Jimmy 379 diesel, 700R4, 3.73s, 31x10.50 x 15
     
  7. 84M1031

    84M1031 Registered Member

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    I was hoping it would bolt to my turbo 400. 6.5 is a na (for now)
    Thanks for your replys.
     
  8. carolina custom

    carolina custom 1/2 ton status

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    The 6.5 will bolt to a turbo400, 350, 700r4, 4l60e, 4l80e, sm456, nv4500, and more.

    84k20,18:1- 6.5td,400/208,4.10,4",35"s
     
  9. Tybee

    Tybee 1/2 ton status

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    Great thanks, that gives me more options.

    1984 GMC Jimmy 379 diesel, 700R4, 3.73s, 31x10.50 x 15
     
  10. mpascino

    mpascino 1/2 ton status

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    Is it true that a 6.5 turbo motor will not fit in the older trucks? I heard the A/C box is in the way...
    Mike

    The jeep eater ......[​IMG]
     
  11. 84M1031

    84M1031 Registered Member

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    NEVER THOUGHT OF THAT. I DON'T KNOW. I AM SURE SOMEONE ON HERE DOES KNOW.

    MIKE
     
  12. arveetek

    arveetek 1/2 ton status

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    The 6.5 is identical in every way externally to a 6.2. Only the injectors are at slightly different angles. You can install 6.5 heads on a 6.2, and vice versa.

    The 6.5 is a better designed engine than the 6.2. It does have bigger valves, and of course bigger displacement.

    The 6.5 turbo engine has ceramic coated pistons to withstand the extra heat of a turbocharger. The 6.5 N/A version does not. If one is planning to install a turbo later on, I highly suggest you get the turbo version of the engine.

    The factory GM turbo setup for the '92 + model trucks do present a problem for the early body style trucks, because the turbo is mounted farther to the rear of the motor, and the turbo downpipe points straight down. It is difficult to clear the A/C housing on our style of trucks, but it has been done.

    Of course, one can always install a Banks turbo system on the 6.5. The 6.2 Banks system will bolt right up. However, the GM 6.5 turbo is wastegated for better performance.

    Hope this helps!

    Later,
    Casey


    1986 K-10, 6.2L N/A diesel, SM465, NP208, 3.73 gears
    <a target="_blank" href=http://community.webshots.com/album/14911798DvydoACKJE>My Chevy Photo Album</a>
     
  13. Goodwrencher

    Goodwrencher Registered Member

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    A/C box interference

    Yes the turbo will interfere with the A?C box. But there is a solution. Remove the factory A/C, Either convert the firewall to a flat steel one like the Hot Rodders do, or mak a steel panel to fill the hole. Then install a Vintage, or Hurricane system. Both work 10 times better than the factory anyway. That is what I am doing with my 6.2 to 6.5 Turbo conversion. Then again I specialize in A/C systems and Hot Rod custom work. It's not that hard though and the systems are well worth it. I am a dealer for both, let me know if you want more info. I also have a great product for saggy springs, that double as traction and stabilizers.

    Goodwrencher
     
  14. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    This forum isn't here for you to drum up business and pimp your parts/services. If that is what you're here for Steve offers a vendor package...

    Rene
     
  15. Goodwrencher

    Goodwrencher Registered Member

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    pimpin' parts

    Just trying to help, I know how hard it is to find the right stuff sometimes
     
  16. rugger03

    rugger03 1/2 ton status

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    besides the AC unit there are a few other areas that you have to worry about, The front drive shaft hitting the cross over pipe, the down pipe hitting the frame rail, and the routing of the exhuast pipe. If i get motivated i might eventually post some pictures, but its a pain becuase i have to get someone else to host them for me.

    cheers, rugger

    Goodwrencher email inbound
     
  17. imiceman44

    imiceman44 1 ton status

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    Yeah the turbo goes where that box is.
    You can modify it though to work.
     

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