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Thread: Disgruntled sixfivediesel owners

  1. #1
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
    Posts
    2,807

    Default Disgruntled sixfivediesel owners

    I see posts of some that are sick of the problems with their 6.5, but from looking at all of the posts, it is not a diesel problem, mostly it is electrical, and so would be the same if one had a gasoline engine, and probably worse because they have more sensors. Don't give up on your diesel.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  2. #2
    Join Date
    Sep 2007
    Posts
    329

    Default

    I love my truck. It's diesel prices that get me pissed off. Right now I'm paying around 90 cent per gallon more than regular unleaded.

  3. #3
    Join Date
    Mar 2007
    Location
    Windsor Ontario
    Posts
    115

    Default

    Only thing that's got me pissed at my 6.5 is it's lack of power towing large loads, as a matter of fact even after the purchase of it's replacement I decided to keep it anyway because of it's reliablity
    1999 GMC K3500 Dually Ext Cab 4X4
    6.5 TD
    260,000 Kms and running strong
    Modded Air Box w/K&N filter
    PMD relocated w/#9 Resistor
    Marine Injectors
    4" Stainless Exhaust

  4. #4
    Join Date
    Jun 2008
    Location
    Burnet durnet Tx
    Posts
    911

    Default ...beast is...

    ...15...4by is14...show me a 14-15yr old dodgem or ford thats holding togather good as my jimmys...diesel technology is in a constant state of flux{for you aggies that means it changes a lot}...a 4.3 z motor{gasser}putz ot the equivalent hp as a mid 70s 350...1st 6.9s{original diesel for ford p/u} were 145hp...in 79 that engine was used by IH in 70 passenger skool buses...most complaints about towing power I get are really about towing speed...cause you alwayz got that one buddy that runz off and leaves you...6.5 is good solid power..only real problem is gmz tstat hsg design...still simple engine{mech pump eng.}simple to troublshoot,,simple to repair...there are some very smart people on this site and ANY problem can be solved with patience...and perserverence...
    ..93 3500HD 200h 4L80E 4.88..11150lbs allatime..88 c.c. dually..6.2..auto w/doug nash 2-sp..camo paint...58 A120 4by IH{old vfd brush trk} 71ford p/u 79 shovel {{{ hooorraaayyy the bus is gone}}} 93 2500 parts truk {gone to that great chrusher in the sky 01 burban{wifes'.."no you can't use mine"}

  5. #5
    Join Date
    Jul 2007
    Location
    Attica, OH
    Posts
    1,061

    Default

    Gms 4.3l Z gas engine is really stout. Add some edelbrock performance parts and bore it fourty over, you got a realy great powrful fuel efficant engine that can power lots. Loved the one in my 91 s-10 when i had it. THat 4x4 s-10 with 5 speed manual would kick some @ass. beat alot of stuff with it. s-10 has terminal ohio cancer and is sittin in the barn, just aint decided what to build to drop the whole injected 4.3 into. 18 mpg in town, 22 on the highway. Wont handel what i pull with my 6.5 though. Ran the crap outta it and it takes it. Looked up thye engine hp specs once, stock had more hp than most all small v-8 of that time frame. (any manufature) Torque was cpomparable, but usually a touch less. But i could outrun stock v-8 dakotas. and repowered rangers with 302 in them. Man that pissed them off of course, i've outrun quite a few vehicles with my 6.5 too. man does that turn heads
    Last edited by JD_countryboy; 10-26-2008 at 08:34 PM. Reason: spellin
    93 chevy K2500 6.5TD 4x4 4l80e auto
    Custom flatbed with foldaway gooseneck ball
    SSDiesel DB2 injector pump marine injectors
    Upgraded turbo ( no id tag but lots of boost)
    SSDiesel 4" exhaust, no muffler, SS crossover
    Rebuilt 4l80e tranny Transgo stage 2 shift kit
    rebuilt HD torque converter
    4x4 Posi Lock
    Opened up air box, stock filter
    Boost, Pyro, Tranny gauges in A-pillar
    Cowl hood, all new paint.
    SS Diesel Cooling upgrade, single tstat Dmax fan,
    '98 HO waterpump.

  6. #6
    Join Date
    Dec 2006
    Location
    NE Texas
    Posts
    270

    Default

    most of the folks around here I hear complain about the 6.5TD stepped out of 454 Chevies or 460 Fords and expected the diesel to have the same "snap" as their gassers. Needless to say they were disappointed.
    But.... show me a 454 or 460 that would stay together like the 6.5TD (with maintenance) and get the fuel mileage of the 6.5TD.
    And as far as diesel prices, my K3500 crew cab is still cheaper to operate than my wife's 04 Honda Pilot and she gets nearly twice the mileage on cheaper fuel. Of course, it took making her get out the payment books and insurance papers to prove that to her.
    Last edited by hraney; 10-27-2008 at 08:29 PM.
    Good...Cheap....Fast.... you can have any two.
    '97 CC K3500 dually. Turbomaster (NO VAC PUMP);SSD Intake;3"downpipe;4"exhaust;SSD PMD;Class V Receiver hitch; Folding GN ball;air bag helpers on rear

  7. #7
    Join Date
    May 2007
    Location
    Ladysmith, WI
    Posts
    500

    Default

    I don't know. My neighbor has a 454 Vortec powered GMC that's holding together nicely, and gets the same mileage as my 6.5 when unloaded and about 2 mpg less when loaded..... And his starts every morning which is alot more than I can say about my 6.5........

    Oh, and I got to drive it hauling a 32' gooseneck stock trailer (steel, not aluminum) that weighs so much, it will put my half ton down on the bump stops.... VERY HEAVY..... It ran circles around my 6.5 pulling half to a third as much......
    -Matt

    Ahh the smell of Diesel Fuel, it's like coffee in the morning!

    My Car:

    1982 Mercedes-Benz 300SD Turbo Diesel (240,000 miles!)

    My Trucks:

    1995 Chevy C1500 4x2 6.5L TD (183,000 miles) Soon to be Cummins
    1988 Chevy C3500 Cummins, Billet Auto. 500+hp/1000+ lb/ft torque. Twin turbos.
    1950 Chevy Loadmaster 2 Ton - Future Cummins Pulling truck.

  8. #8
    Join Date
    Aug 2007
    Location
    Manitoba, Canada
    Posts
    298

    Default Db2

    So I been lookin' back over a couple old Diesel Power's and in a write up on the Stanadyne DB2 it says the pump supports motors with as high as 200 HP.

    I would assume that unless the displacement of the pump is enlarged there is no way you can get more than 200 crankshaft hp from the pump since it simply can not pump enough fuel.

    It has been my understanding that the only difference between a DB2 and a DB4 is that the DB4 is electronically controlled and the DB2 is mechanical.

    So is there no way to get more that 200hp from our 6.5's?
    94 GMC K1500, 4L80E, 3.73gears, EGR plugged, intake reamed out but OEM filter, 3inch downpipe and exhaust, boost and pyrometer gauges, kennedy chip, 600kms. on average tank with no load and light foot. Super truck!

  9. #9
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
    Posts
    2,807

    Default

    I think that diesel power is wrong, because theoretically my burb is producing more than 200 hp with a #9 resistor.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  10. #10
    Join Date
    Aug 2007
    Location
    Manitoba, Canada
    Posts
    298

    Default

    Well, supposedly the article was written by a Stanadyne engineer.
    94 GMC K1500, 4L80E, 3.73gears, EGR plugged, intake reamed out but OEM filter, 3inch downpipe and exhaust, boost and pyrometer gauges, kennedy chip, 600kms. on average tank with no load and light foot. Super truck!

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