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Thread: Duramax fuel cooler

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  1. #1
    Join Date
    Sep 2002
    Location
    Iowa
    Posts
    2

    Post

    Do the 2003's 6600 have a fuel cooler?
    I am brand new to this and am thinking about a new Duramax. I read somewhere that there is a fuel cooler but I don't remember which model year.
    This is my first post.
    thanks

  2. #2
    Join Date
    Mar 2002
    Location
    Portland, Oregon
    Posts
    44

    Post

    First off welcome "cabdoors" I'm sure others will chime in on this but the only fuel cooler I know of is a little raditor looking thing in front of the fuel tank. Kneel down on the drivers side, front edge of the box and you'll see the tank with the cooler in front of it. Second, quit thinkin' and go get it!! You'll be in love from the first drive and develope that famous "DMAX Grin". After 7 months and 10,000 miles I'm still impressed. You'll get lots of geat info from our fellow members, so enjoy the site, and go buy that truck
    '02 2500HD, LS, Ext Cab, LB, D/A combo, 4x4, Indigo Blue (the good lookin' blue), Graphite Interior/Buckets, just about every option but leather
    MAN ... I LOVE THIS THING!!

  3. #3
    Join Date
    Jul 2002
    Location
    Hemet Ca - Southern Ca.
    Posts
    23

    Post

    Hey Guys, if you run dirt or dusty Roads,blow the Fuel Cooler out now and then . Makes for better running.

    2001 Dmax crew 3500 stock.

  4. #4
    Join Date
    May 2002
    Location
    Rogers Mn
    Posts
    140

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    Merconvert Thanks for the pointer. One more thing to remember to check...
    2002 Silverado DA combo 4 whl CC.
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  5. #5
    Join Date
    Dec 2001
    Location
    Lexington Park, Md
    Posts
    137

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    Welcome to the forum, Cabdoors. I do believe that the cooler in front of the tank is an engine oil cooler. It is mounted there to warm the diesel. Diesel doesn't like cold.

    Joe

    [ 09-11-2002: Message edited by: Allison Jettester ]</p>
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  6. #6
    Join Date
    May 2002
    Location
    Oxnard, CA
    Posts
    338

    Post

    My 2003 has the little radiator in front of the fuel tank, so yes to 2003 Fuel Coolers [img]smile.gif[/img]
    Randy<br />2003 2500HD C/C D/A Pewter -Retrax Cover -Michelin LTX M/S 265/75E-16\'s -Smittybuilt Step Rails -Banks Exhaust -CA Hot Juice -Predator - Kennedy Headlight Harness -SPA 211

  7. #7
    Join Date
    Jan 2002
    Location
    Virginia Beach, VA
    Posts
    109

    Post

    I was under the impression the little radiator in front of the fuel tank was the injector computer. The fuel runs through it to cool it and the fins help dissapate heat the old fashioned way. My 2K2 has this assembly, maybe what you guys are referring to is in addition to it.

    Kevin
    2K2 EC/SB K2500 D/A<br />Other than the TS123, Dakota Digital Boost and EGT gauges and the H2 Wheels with 33x12.50 R17s - Bone Stock

  8. #8
    Idle_Chatter Guest

    Post

    Nope, the injection computer is up on the engine and fuel is run around it there to remove heat. The return fuel then goes back down along the DS frame rail and up through that fuel cooler "radiator" before going back to the the tank. That's one reason for the admonition about running the tank too low. All the return heat from the ECM isn't mixed with enough cooler fuel in the tank and the fuel going forward is getting hotter and may not cool the ECM enough. When I plumbed in my aux tank, it came with a quick-connect tool to snap into that fuel cooler so that returning fuel goes through the cooler and then to the "in service" tank (OEM or aux). As one who spent a bit of time up under there futzing around with the plumbing, I can tell you that it is just a tube & fin cooler. And it's not oil, Jettster, it's fuel - and the return flow of warm fuel *and* the heat added to it by the ECM take care of that "cold diesel syndrome" you're referring to.

    [ 09-11-2002: Message edited by: Idle_Chatter ]</p>

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