'95 cummins running a little warm?

mycodiesel · 02-04-2008, 07:39 PM

well, my dodge has 337,000 miles on the engine. i just replaced the injection pump, lift pump, injectors and radiator. the truck runs around 189F unloaded or loaded, i was reading that the temp should be about 160-170F except under heavy load. am i being paranoid or should i investigate this issue further? i have done quite abit of work on this rig, and just want make sure that my engine is not gonna die on me! if any body has any ideas lets hear'em.

bcollin3 · 02-04-2008, 07:41 PM

Our '95 always runs around 190 unloaded... more on the 202 side heavily loaded. That sounds about right. Could be different in Oregon though...

__________________
2001 - 2500 5.9 H.O. 6 spd. SWB - 4x4 - 4.10 gears - South Bend Performance Clutch - FASS 150/150 - FASS Draw Straw - 5'' turbo back straight pipe - Edge w/attitude - S&B cold air intake- Banks Ram Air Intake - Silencer ring MIA

mycodiesel · 02-04-2008, 09:47 PM

Huh? maybe thats the temp the 12v is susposed to run at. i think i'm still investing in a new fan clutch from mopar or cummins. besides from thinking it runs to hot, the engine performs good for something that has 337,000 miles.

stevep · 02-06-2008, 11:46 AM

My 97 unloaded never hits 190, the gages probably are not very accurate

i know my thermostat is working, i can see the temp drop when it opens

peace,

steve

.

__________________
John 3:16

97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

jpringle3@hotmail.com · 02-06-2008, 12:26 PM

The thermostat should be a 190. In my experience if you run it any cooler than that you get problems with accelerated wear. Cummins says the minimum operating temp is 158 the maximum is 212. Make sure your radiator cap is good 15 lbs. To test you thermostat with the engine cold, buy one of those inferred thermometers, cover the front up with plastic run the motor at 1800 RPM when the top rad hose gets flow threw it test the heat below the thermostat that's the thermostat opening temp. Then remove the plastic and see if the temp goes way down if it does you should get some kind of cover to keep the heat up. If it is real cold besides a winter front get a tarp from the bottom of the radiator to behind the transmission.

__________________
JP 3

Licenced HD mechanic for 35 years. RETIRED!

worked on engines all my life. Spent last 19 HAPPY

years at Freightliner

mycodiesel · 02-07-2008, 04:28 PM

well, the problem is not running cool but running warm around 185-190f unloaded or loaded. i now my thermo is working some what because the temp does drop once it hits 190f and drops down to 170-180f. after that initial temp drop it's back at 189-190f and stays there until i stop at light, and it will drop to 185f until i start accelerating back up it goes. i'm thinkin a new fan clutch is a must, the one thats currently in the engine is fairly used(337,600miles). i hope it's not a head problem or something worst!!

__________________
1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!

***Whistler*** · 02-07-2008, 04:33 PM

My 12 valve was running a little warm until I pulled the radiator to find out that between it and the intercooler was full of grass. I spent a long time cleaning both of them with a water hose and the problem stopped. Looking between them, it looked clean but after pulling it is when I saw all of the junk buried in the fins.

__________________
97 3500 4x4 Auto, Goerend Tranny & TC, 15* timing, #10 plate full forward, autometer gauges, lock up switch, prime loc, Amsoil Nano, straight piped, posi-lok, lots to come

mycodiesel · 02-07-2008, 04:56 PM

i just replaced the radiator along with the entire fuel system, i'm thinkin it's either the fan clutch or something internal!!

__________________
1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!

stevep · 02-07-2008, 08:03 PM

It might just be the gage ?

i think mine is reading way low,...
yours might be reading high

.

__________________
John 3:16

97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

stevep · 02-07-2008, 08:04 PM

jpringle, How much do those infrared thermometers cost ?

it might be worth having one

Ok,... Think i found one,.. is this what your talking about ?

Low Cost Infrared Thermometer

.

__________________
John 3:16

97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

Last edited by stevep : 02-07-2008 at 08:13 PM.

stevep · 02-08-2008, 09:14 PM

Quote:

Originally Posted by mycodiesel

well, the problem is not running cool but running warm around 185-190f unloaded or loaded. i now my thermo is working some what because the temp does drop once it hits 190f and drops down to 170-180f. after that initial temp drop it's back at 189-190f and stays there

That sounds normal

I replaced my Tstat today with the new Cummins Part No. 3934373
and my gage is reading the same as before, it reaches around 170 and drops to 150

My gage must be whacked

my old thermostat, Cummins Part No. 3928499, had the same reading on the gage but would cycle allot faster

the new one is slower

i think your fine

but it wouldn't hurt to replace with the new part#

peace,

steve

.

__________________
John 3:16

97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

Last edited by stevep : 02-08-2008 at 09:20 PM.

mycodiesel · 02-09-2008, 03:34 PM

yeah, i think i'm being paranoid about it. i'm use to gas engines that the temp is either cool or over heating, the diesel temp moves up and down depending on load. thanks for all the support!

__________________
1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!

02-04-2008, 07:39 PM	#1 (permalink)
mycodiesel Cummins Fan Join Date: Feb 2008 Location: eugene, oregon Posts: 53 mycodiesel's Truck Pics	'95 cummins running a little warm? well, my dodge has 337,000 miles on the engine. i just replaced the injection pump, lift pump, injectors and radiator. the truck runs around 189F unloaded or loaded, i was reading that the temp should be about 160-170F except under heavy load. am i being paranoid or should i investigate this issue further? i have done quite abit of work on this rig, and just want make sure that my engine is not gonna die on me! if any body has any ideas lets hear'em.

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02-04-2008, 07:41 PM	#2 (permalink)
bcollin3 Cummins Enthusiast Join Date: Dec 2007 Location: Lewisburg, TN Posts: 244 bcollin3's Truck Pics	Our '95 always runs around 190 unloaded... more on the 202 side heavily loaded. That sounds about right. Could be different in Oregon though... __________________ 2001 - 2500 5.9 H.O. 6 spd. SWB - 4x4 - 4.10 gears - South Bend Performance Clutch - FASS 150/150 - FASS Draw Straw - 5'' turbo back straight pipe - Edge w/attitude - S&B cold air intake- Banks Ram Air Intake - Silencer ring MIA

02-04-2008, 09:47 PM	#3 (permalink)
mycodiesel Cummins Fan Join Date: Feb 2008 Location: eugene, oregon Posts: 53 mycodiesel's Truck Pics	Huh? maybe thats the temp the 12v is susposed to run at. i think i'm still investing in a new fan clutch from mopar or cummins. besides from thinking it runs to hot, the engine performs good for something that has 337,000 miles.

02-06-2008, 11:46 AM	#4 (permalink)
stevep Cummins Enthusiast Join Date: Jan 2008 Location: Orange County ca Posts: 214 stevep's Truck Pics	My 97 unloaded never hits 190, the gages probably are not very accurate i know my thermostat is working, i can see the temp drop when it opens peace, steve . __________________ John 3:16 97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

02-06-2008, 12:26 PM	#5 (permalink)
jpringle3@hotmail.com Cummins Enthusiast Join Date: Feb 2007 Posts: 263 jpringle3@hotmail.com's Truck Pics	The thermostat should be a 190. In my experience if you run it any cooler than that you get problems with accelerated wear. Cummins says the minimum operating temp is 158 the maximum is 212. Make sure your radiator cap is good 15 lbs. To test you thermostat with the engine cold, buy one of those inferred thermometers, cover the front up with plastic run the motor at 1800 RPM when the top rad hose gets flow threw it test the heat below the thermostat that's the thermostat opening temp. Then remove the plastic and see if the temp goes way down if it does you should get some kind of cover to keep the heat up. If it is real cold besides a winter front get a tarp from the bottom of the radiator to behind the transmission. __________________ JP 3 Licenced HD mechanic for 35 years. RETIRED! worked on engines all my life. Spent last 19 HAPPY years at Freightliner

02-07-2008, 04:28 PM	#6 (permalink)
mycodiesel Cummins Fan Join Date: Feb 2008 Location: eugene, oregon Posts: 53 mycodiesel's Truck Pics	well, the problem is not running cool but running warm around 185-190f unloaded or loaded. i now my thermo is working some what because the temp does drop once it hits 190f and drops down to 170-180f. after that initial temp drop it's back at 189-190f and stays there until i stop at light, and it will drop to 185f until i start accelerating back up it goes. i'm thinkin a new fan clutch is a must, the one thats currently in the engine is fairly used(337,600miles). i hope it's not a head problem or something worst!! __________________ 1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!

02-07-2008, 04:33 PM	#7 (permalink)
*Whistler* Diesel Freak Join Date: Jan 2007 Location: Lubbock,TX Posts: 581 Whistler's Truck Pics	My 12 valve was running a little warm until I pulled the radiator to find out that between it and the intercooler was full of grass. I spent a long time cleaning both of them with a water hose and the problem stopped. Looking between them, it looked clean but after pulling it is when I saw all of the junk buried in the fins. __________________ 97 3500 4x4 Auto, Goerend Tranny & TC, 15* timing, #10 plate full forward, autometer gauges, lock up switch, prime loc, Amsoil Nano, straight piped, posi-lok, lots to come

02-07-2008, 04:56 PM	#8 (permalink)
mycodiesel Cummins Fan Join Date: Feb 2008 Location: eugene, oregon Posts: 53 mycodiesel's Truck Pics	i just replaced the radiator along with the entire fuel system, i'm thinkin it's either the fan clutch or something internal!! __________________ 1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!

02-07-2008, 08:03 PM	#9 (permalink)
stevep Cummins Enthusiast Join Date: Jan 2008 Location: Orange County ca Posts: 214 stevep's Truck Pics	It might just be the gage ? i think mine is reading way low,... yours might be reading high . __________________ John 3:16 97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab

02-07-2008, 08:04 PM	#10 (permalink)
stevep Cummins Enthusiast Join Date: Jan 2008 Location: Orange County ca Posts: 214 stevep's Truck Pics	jpringle, How much do those infrared thermometers cost ? it might be worth having one Ok,... Think i found one,.. is this what your talking about ? Low Cost Infrared Thermometer . __________________ John 3:16 97,4x4 12V,100 Plate FF, AFC FF, Built Auto, 3.54s, BHAF, ATS exhaust manifold, 4" Turbo Back Exhaust, Silencer Ring MIA, TQ Lock up Switch, Optimas, Optix Guages, Luke's Link on Trackbar, KDP tab Last edited by stevep : 02-07-2008 at 08:13 PM.

02-09-2008, 03:34 PM	#12 (permalink)
mycodiesel Cummins Fan Join Date: Feb 2008 Location: eugene, oregon Posts: 53 mycodiesel's Truck Pics	yeah, i think i'm being paranoid about it. i'm use to gas engines that the temp is either cool or over heating, the diesel temp moves up and down depending on load. thanks for all the support! __________________ 1995 dodge 12v cummins turbo diesel 5spd 4x4 with 350,200 miles and counting. new fuel system, 5" single stack, 4" high flow down pipe and flat bed comin soon!!, it's my work truck!