05 6.0 Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sarge261 · 10-26-2009, 04:32 PM

Hey All,

I am working on a 2500 HD 6.0 and here are the symptoms. The truck overheats at idle. Its not consistant though. The customer wanted me to change the t-stat, so I did and I flushed the coolant and replaced it with some fresh dex cool.

The coolant temp was about 40* off so that was replaced also. It took forever to get all the air out of the system. I was looking for a bleeder valve but couldnt find one.

I know there is a TSB out there for trucks with plows having an overheat condition with the plow on and driving slow. Is there anyway to check the fan clutch? This happened to the customer so I am not sure how long he drove it hot. When the cap was off the resivoir the coolant was jumping out of the bottle so I am not sure if there is a HG issue here either. I dont smell coolant in the exhaust, it has good heat, so I know the tstat is working.

Oh yeah its a 4x4 with a plow, the plow was on it when it overheated on the owner, the plow is not on it now, and it still over heats on me after the repairs.

Thanks for the help.

Sarge

**truckdude239** · 10-27-2009, 07:21 AM

water pump? pluged radiotir

Shon · 10-27-2009, 09:37 AM

when driving the temp is fine?
Remove T-stat and see if water is flowing and if that solves the issue.

I had a LS1 swap and driving around things were fine but at idle/red light the temps would get up in a hurry. I replaced water pump no change. took out thermostat and all was fine.

I know you said you replaced the T-stat but it could be faulty too....but if you removed it you can tell if the pump is moving the water.

Sarge261 · 10-27-2009, 02:11 PM

Thanks for the help, a little more burping and shes all good now...man these things are a pain in the you know what.

Anyway thanks again,

Sarge

Shon · 10-27-2009, 02:43 PM

You think these are bad, should have done an LT1, now that is a PITA....
What alot of people do not realize is they have to fill the block up first on the truck motors and then fill the radiator.

Sarge261 · 10-27-2009, 04:37 PM

yeah easier said then done with these things.

Sarge

Shon · 10-27-2009, 04:39 PM

take upper rad hose off and pour it down the neck. then fill radiator....

10-26-2009, 04:32 PM	#1
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	05 6.0 Help Hey All, I am working on a 2500 HD 6.0 and here are the symptoms. The truck overheats at idle. Its not consistant though. The customer wanted me to change the t-stat, so I did and I flushed the coolant and replaced it with some fresh dex cool. The coolant temp was about 40* off so that was replaced also. It took forever to get all the air out of the system. I was looking for a bleeder valve but couldnt find one. I know there is a TSB out there for trucks with plows having an overheat condition with the plow on and driving slow. Is there anyway to check the fan clutch? This happened to the customer so I am not sure how long he drove it hot. When the cap was off the resivoir the coolant was jumping out of the bottle so I am not sure if there is a HG issue here either. I dont smell coolant in the exhaust, it has good heat, so I know the tstat is working. Oh yeah its a 4x4 with a plow, the plow was on it when it overheated on the owner, the plow is not on it now, and it still over heats on me after the repairs. Thanks for the help. Sarge __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR Last edited by Sarge261; 10-26-2009 at 04:33 PM.

10-27-2009, 07:21 AM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,220	Re: 05 6.0 Help water pump? pluged radiotir __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

10-27-2009, 09:37 AM	#3
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 05 6.0 Help when driving the temp is fine? Remove T-stat and see if water is flowing and if that solves the issue. I had a LS1 swap and driving around things were fine but at idle/red light the temps would get up in a hurry. I replaced water pump no change. took out thermostat and all was fine. I know you said you replaced the T-stat but it could be faulty too....but if you removed it you can tell if the pump is moving the water. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

10-27-2009, 02:11 PM	#4
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	Re: 05 6.0 Help Thanks for the help, a little more burping and shes all good now...man these things are a pain in the you know what. Anyway thanks again, Sarge __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR

10-27-2009, 02:43 PM	#5
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 05 6.0 Help You think these are bad, should have done an LT1, now that is a PITA.... What alot of people do not realize is they have to fill the block up first on the truck motors and then fill the radiator. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

10-27-2009, 04:37 PM	#6
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	Re: 05 6.0 Help yeah easier said then done with these things. Sarge __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR

10-27-2009, 04:39 PM	#7
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 05 6.0 Help take upper rad hose off and pour it down the neck. then fill radiator.... __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap



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