Operating Temp

CapnDean · 11-30-2012, 06:13 PM

Got 2 very similar trucks:
Mine is 06 GMC SLT CCSB 4wd
Nephew's is 06 Chevy LT CCSB 4wd

mine runs 180 on the head. (interstate no load empty)
his runs 210 (interstate no load empty)

Get off the interstate and idle....his goes to 180.
Get off the interstate and idle....mine stays at 180.

His truck up until about a week ago held 180 all the time.

Going to pull his thermostats and see if that makes a difference first. If not, will chase down a heat gun to see if there really is a diff in temp and not just normal gage differential.

Any other obvious things to check? Performance on both trucks seems equal.

**TheStepChild** · 11-30-2012, 06:18 PM

How are you reading temps on each truck?

CapnDean · 11-30-2012, 08:23 PM

Quote:

Originally Posted by TheStepChild

How are you reading temps on each truck?

factory gage

SST 1953 · 11-30-2012, 08:57 PM

Put a monitoring it,the factory gauge lies

04LB7 · 12-01-2012, 09:21 AM

Does his truck have a cat on it? I know when my 06 had a cat on it, it alway ran at 210. Then when I finally took it off it started running cooler at 180. I have no clue why my 06 even had a cat on it. Guess it just depends on where it was built.

**ty_LBZ** · 12-01-2012, 09:44 AM

Thermostats are 180* and 185*, your truck is running good.

CapnDean · 12-02-2012, 09:13 AM

Replaced both thermostats. No change. Truck is clearly not overheating. But the gage rolls up to 210 on the interstate and slides back down if you throttle back to 60 mph or so.

Remember....this is a recent change from normal..... truck previously remained at 180 (on the factory gage) at all times.

I understand that so long as it is not overheating, it is not a problem per se.... Just an annoyance. Think like an airplane pilot. Although temps are within specs...there is a change.

**blunova** · 12-02-2012, 09:25 AM

Mine runs at 181 most of the time thru my insight, my factory gauge reads 5 degrees hotter

battlegraduate09 · 12-02-2012, 09:37 AM

My insight reads 165 here lately, factory gauge reads normal temp

**TDFDiesel** · 12-02-2012, 09:42 AM

Didn't sound like a thermostat to begin with, I would start by using an electronic gauge or scanner, then go from there. Our gauges aren't that accurate.

If you do have that difference I would start by cleaning the radiator stack.

Are both trucks stock?

Sent from my iPhone using AutoGuide.com App

11-30-2012, 06:13 PM	eBay Motors #1 (permalink)
CapnDean Junior Member Join Date: Feb 2011 Location: Mississippi Gulf Coast Posts: 206	Operating Temp Got 2 very similar trucks: Mine is 06 GMC SLT CCSB 4wd Nephew's is 06 Chevy LT CCSB 4wd mine runs 180 on the head. (interstate no load empty) his runs 210 (interstate no load empty) Get off the interstate and idle....his goes to 180. Get off the interstate and idle....mine stays at 180. His truck up until about a week ago held 180 all the time. Going to pull his thermostats and see if that makes a difference first. If not, will chase down a heat gun to see if there really is a diff in temp and not just normal gage differential. Any other obvious things to check? Performance on both trucks seems equal. __________________ 2006 GMC 2500HD SLT CCSB 4WD, K&N, Autocal DSP5,RDS Toolbox/Transfer Tank, Nicktane Cat Filter, PCV Reroute, Toyo 285 AT II's, FASS 150 HD, ADP Sump, EGR Block, leveled. Last edited by CapnDean; 11-30-2012 at 06:16 PM.

11-30-2012, 06:18 PM	eBay Motors #2 (permalink)
TheStepChild Creepy Join Date: Feb 2010 Location: Look out your window, see that van? Posts: 7,250	How are you reading temps on each truck? __________________ '07 LBZ '12 Express Van

11-30-2012, 08:57 PM	eBay Motors #4 (permalink)
SST 1953 DuramaxForum Veteran Join Date: Mar 2012 Location: Casper, Wyoming Posts: 1,055	Put a monitoring it,the factory gauge lies __________________ 2007 CCSB LBZ. EFI live DSP 5 by Rob @ ATP EGR blocked, PVC reroute AirDog II 165 TransGo Jr/pump rub mod Firestone bags 4" MBRP Edge Insite CTS w/ backcam Cognito W/Bilsteins 69 Camaro S/ST-S/Gas

12-01-2012, 09:21 AM	eBay Motors #5 (permalink)
04LB7 Junior Member Join Date: Nov 2006 Location: Md Posts: 108	Does his truck have a cat on it? I know when my 06 had a cat on it, it alway ran at 210. Then when I finally took it off it started running cooler at 180. I have no clue why my 06 even had a cat on it. Guess it just depends on where it was built. __________________ 2006 Chevy 3500 HD Crew Cab dually. Straight pipe MBRP 4" exhaust PPE level 2 PPE air box mod Stock tranny (for now)

12-02-2012, 09:13 AM	eBay Motors #7 (permalink)
CapnDean Junior Member Join Date: Feb 2011 Location: Mississippi Gulf Coast Posts: 206	Replaced both thermostats. No change. Truck is clearly not overheating. But the gage rolls up to 210 on the interstate and slides back down if you throttle back to 60 mph or so. Remember....this is a recent change from normal..... truck previously remained at 180 (on the factory gage) at all times. I understand that so long as it is not overheating, it is not a problem per se.... Just an annoyance. Think like an airplane pilot. Although temps are within specs...there is a change. __________________ 2006 GMC 2500HD SLT CCSB 4WD, K&N, Autocal DSP5,RDS Toolbox/Transfer Tank, Nicktane Cat Filter, PCV Reroute, Toyo 285 AT II's, FASS 150 HD, ADP Sump, EGR Block, leveled.

12-02-2012, 09:25 AM	eBay Motors #8 (permalink)
blunova Duramax Lifetime Supporter Join Date: Jul 2012 Location: butler, pa Posts: 393	Mine runs at 181 most of the time thru my insight, my factory gauge reads 5 degrees hotter __________________ 2007 Classic lbz Turbo back exhaust, Efi live auto cal from idaho Rob egr blocked, trans go jr, grizzly locker,leveled 285-75-16 wrangler duratracs radials on pro comp wheels,remote start, afe intake air dog 165, billstien 5100s,Afe intercooler pipe, pcv valve reroute, diamond eye down pipe , bushwacker pocket flares, BD exhaust manifold, g2 diff cover with girdle stage 5 trans coming soon. line x bed liner,extang trifold toneau,edge cts, allison deep pan with transynd fluid suncoast filter lock.

12-02-2012, 09:37 AM	eBay Motors #9 (permalink)
battlegraduate09 DuramaxForum Fanatic Join Date: Mar 2010 Location: Abingdon Virginia Posts: 5,795	My insight reads 165 here lately, factory gauge reads normal temp __________________ Josh 04 LLY CCSB 4X4

12-02-2012, 09:42 AM	eBay Motors #10 (permalink)
TDFDiesel I'm That Guy... Join Date: Aug 2010 Location: Gilbert, AZ Posts: 13,067	Didn't sound like a thermostat to begin with, I would start by using an electronic gauge or scanner, then go from there. Our gauges aren't that accurate. If you do have that difference I would start by cleaning the radiator stack. Are both trucks stock? Sent from my iPhone using AutoGuide.com App __________________ Tony Non Vendor contact information, URLs and/or links are NOT allowed in signatures or on forum! My opinion is not the opinion of Duramax Forum, Auto Forums, Auto Guide, or other Duramax Forum staff members! *CLICK TO READ: FORUM RULES AND DF STAFF!* Thank you Rob Coddens (Idaho Rob), Dustin @ ATP, Scott @ SDP, Kory Willis, and Mike L. for all of your help! Shhh... I sold my Dmax and I own a gasser now, don't tell anyone!!! I'll buy another Dmax soon, probably LLY or LBZ.

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