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Thread: My new 1993 HMMWV 998

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    Default My new 1993 HMMWV 998

    Have posted a few questions and thought I should post the pics of my new HMMWV. Picked it up last weekend. Its a '93 with a 6.5L rebuilt by the Gov in 2008. Has 6800 miles since rebuild. I'm loving it. A few quirks to learn here and there, but this machine is a beast! Gotta figure out cold starts, its pretty cold blooded. Radio came with it and works.

    Scott...

    hmmwv1.jpghmmwv2.jpghmmwv3.jpg

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    Sergeant Major ikoinu's Avatar
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    Classic glow pluggery. Lots of topics posted on that.
    Really nice looking truck!
    1988 M998 Daily Driver

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    Administrator steelsoldiers's Avatar
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    Great looking HMMWV! Hope you have a lot of fun with it!
    Chris Stansbury, founder of Chris' CUCV Homepage in 1998 and Steel Soldiers in 1999.

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    2 Star General TOBASH's Avatar
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    Welcome! Nice rig!
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


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    Nice looking truck!!!
    Jealous on the radio....I'm fabricating one based on the 524 you have but with some modern details

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    Nice!

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    Quote Originally Posted by ikoinu View Post
    Classic glow pluggery. Lots of topics posted on that.
    Really nice looking truck!
    Thanks,

    I've been pondering just ordering a complete set of Kascar glow plugs and replacing them all to see if that helps things. Cant hurt right?

    Is it safe to assume these work in a 6.5L?

    https://real4wd.com/store/Glow-Plug-...tailid=1098741

    Scott...
    Last edited by sagreen83; 02-07-2019 at 20:05.

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    Sergeant Major ikoinu's Avatar
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    Do it. Peace of mind.
    Get this guy too, you'll thank me: https://real4wd.com/store/Glow-Plug-Removal-Tool

    Test your glow plug wires. Mine were getting 24v 100% of the time when the ignition was on. Smart box was a little messed up, worked otherwise still giving the wait to start light for 8 seconds.

    I left everything attached, except unplugged all the glow plugs. Swapped them out (using the tool I listed) and wired in a relay/switch/additional NOS plug wires to switch the glow plug controller from smart (stupid) box to manual.

    I'm happy with my decision to not ride on the smart box carousel anymore, only issue is I have to be cautious with my button pushing. 6 seconds, 8 seconds max.
    I also always keep a spare set of plugs on standby just in case.

    Note: your ammeter gauge on the dash will tell you if the majority of your plugs are shot. You should see a significant dip in the gauge while starting for 8 seconds or so when cold, if you don't it means the plugs aren't drawing because they're fried.
    Last edited by ikoinu; 02-07-2019 at 22:13.
    1988 M998 Daily Driver

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    Colonel Milcommoguy's Avatar
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    Very good advice is to check and be clear how and the distribution of power to the glow plugs and when it should be or more important NOT be energized. A good set sucks a lot of AMPS 80 +/- so it is easy to see the VOLTMETER dip when when they are going hot and or cycling (voltage drop in system wiring)

    IMO Ohm them out first and go from there. Anything over 5 Ohms, toss them in the "just in case" spares box. Open ones to the scrap metal bin. If you are going for new change them all at same time and keep fingers crossed. Go to the first statement above and VERIFY the BOX is not "HOT HANGING' Shut it down if OVER 8-10 seconds and start scratching head for serious BOX trouble. Good batteries are a must. Those plugs you listed for sale are good too.

    HOW TO:

    IN or OUT of truck, ONE at a time.

    Using multi-meter, check glow plug internal resistance OHMS. Verify meter is functional correctly FIRST.

    Connect one test lead to top terminal and other test lead to threaded area.

    Glow plug internal resistance should be 1.5-5.0ohms.

    If resistance is not 1.5-5.0 ohms, replace glow plug.

    Note: Should be in a range between the others. Say 1.6, 1.7, 1.8, 1.9, 1.8 Matching closely. Odd ball out is 4.6, 2.4, 5.3, 3.1, 1.9 not matched up well BUT ??? workable.

    NEW ONES... CHECK BEFORE USING.

    No dog in the race link here > https://www.accuratediesel.com/shop/115.html

    Get them while there hot,

    CAMO

    GOOD LUCK
    Last edited by Milcommoguy; 02-07-2019 at 22:33.

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    CAMO and Ioinu, thank you so much for your detailed help! Glow plugs and removal tool on order.

    I notice my gauge dips, not sure what the amps it dips are, but its about 1/8th of the gauge dip while the light is on. I'll check the ohms and cables as well.

    Thanks!!
    Scott...

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