Cooling system problem. - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 22 (permalink) Old 11-03-2007, 03:20 PM Thread Starter
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Cooling system problem.

I am having a problem with the system. It appears to be overpressurizing, if I drive it the Low Coolant light comes on. I can then twist the cap and the coolant comes back up to its normal level. And yes the coolant level actually drops to the add mark until I twist the cap off.

There is a new coolant cap on the truck from GMC used the VIN to make sure it was the proper one.

What am I overlooking?

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

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post #2 of 22 (permalink) Old 11-03-2007, 07:12 PM Thread Starter
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Never mind guys, I filled it up with the engine off and cold, and it seems to have done the trick. Thanks, just disregard this post as I am still new to the surge tank concept and this Dmax. No owners manual is not helping me out either.

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #3 of 22 (permalink) Old 11-04-2007, 11:25 AM
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This may help

http://members.cox.net/beekiller/GMC...emystified.doc

Michael
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Learn about INDUCTION OVERHEATING


ECM's FOR SALE
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post #4 of 22 (permalink) Old 11-04-2007, 01:12 PM Thread Starter
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That was indepth, and very helpful. Thank you for that post, I will be filling the system for the next few days to make sure it is ok. Thanks again and I will be in contact before I head to Sedona, that way you will have a V2 ready for me.

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #5 of 22 (permalink) Old 11-04-2007, 01:29 PM
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Dont forget to "burp" the system. There's a small screw on the top of the thermostat housing that you are supposed to loosen as you run the engine and add coolant, this allows air to release.

Just dont forget to tighten it back up after you're done filling.....if you dont, you'll eventually get a geyser similar to Old Faithful under your hood. Seen it happen...
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post #6 of 22 (permalink) Old 11-04-2007, 02:17 PM Thread Starter
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I will do that shortly, the lil man just fell asleep for a nap, so I have an hour or two to get some additional work done. Thanks again,

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #7 of 22 (permalink) Old 11-05-2007, 11:34 PM Thread Starter
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Looks like the problem went from bad to worse. Just diagnosed it as Head Gaskets thanks in part to Eric at Merchant. The dealer says to take it to their shop and they will work something out with me about it. I am hoping that means half of their cost, which is .01's on the $1. It has to be done, just wish it was a year down the road, hopefully they flog their service section for missing it and I get it for free.

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #8 of 22 (permalink) Old 11-06-2007, 12:40 AM
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Quote:
Originally Posted by TheBac
Dont forget to "burp" the system. There's a small screw on the top of the thermostat housing that you are supposed to loosen as you run the engine and add coolant, this allows air to release.

Just dont forget to tighten it back up after you're done filling.....if you dont, you'll eventually get a geyser similar to Old Faithful under your hood. Seen it happen...
Well, that happened to us at the track once, before we ran, the coolant overpressurized when it was cold. My dad opened the cap, and a geyser of coolant exploded.

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post #9 of 22 (permalink) Old 11-06-2007, 10:02 AM Thread Starter
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Yup, taking it in shrtly now. Towing my own truck to be repaired, man this is depressing. I have never had to tow my own truck for it being broke down. Hopefully the dealer gets this worked out in my favor rather quick. Wish me luck guys.

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #10 of 22 (permalink) Old 11-07-2007, 10:18 AM
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Unfortunately, 01s had the head gasket problem. They were re-designed in 02. Once they are replaced, you shouldnt have any more issues.
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