MNorby

In the summer my 97 water temp gauge cycles up and down like normal but in the winter it never even gets to 180. I put a piece of cardboard in front of the radiator with a hole in front of the fan clutch (so it thinks it cold and doesn't engage) and that doesn't help. Heck I even had the cardboard in all last summer and even towing it never gets near hot, just normal cycling from like 200-170 or so like the TSBs explain.
Now that its getting cold out again its never getting up to normal temp and therefore the heater never really works great. Do you think the thermostat is sticking and never fully closes? If so what brand of thermostat is best? Napa, Dealer, etc?
Mods are in my sig and it has 197k.

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1997 Reg cab 2500; 5" lift; 315s on M/T Classic IIs;5" straight exhaust; #100 plate; BHAF; KDP tabbed; Ultra-lite pyro and boost, and other misc goody goodies...

John Faughn

I went to Cummins , but it seems they sell a cooler temp [ about 165*F ] than what was in it before [ 180* ] .
So I would ask what temps are avalable and get the 180* .

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Build-12-93 Cummins WHC1 94 2500 4x4 SLT AT 3:55 265 R75 16 New Amsoil EAA cone air filter Amsoil 15-40 dualbypass found here about 01-05 DYNO at Mikes feb19 05 245.7HP 597TQ with coming out of lockup -so not sure about HP&TQ DiPrpocl trans temp EGT boost MBRP 4" alum exhaust Centramatics wheel balancers Solid Steel DSS track bar retro fit kit stabbed KDP

infidel

I don't think there is anything you can do about it except use your heater in the recirculate mode.
In the Montana winter I've found you don't even need a radiator, just the heater core is enough to cool the engine especially when sucking outside air.

You can try removing your fan completely, I used to do it back before global warming made our winters warmer but haven't done it for several years.
It does help some. I was able to leave my fan removed from Oct to May with no problems as long as I wasn't towing heavy.

Never found winter fronts or cardboard to help at all.
Changing the stat doesn't help either since very little coolant is flowing though the radiator when it gets real cold.

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Bill
'95 2500 4x4 auto
'95 3500 5 speed flatbed hauler
stock for one day

b4black

My truck wasn't getting warm either. The stock thermostat has a piece of rubber that comes loose and gets caught. It keeps the thermostat from closing completely.

Looked like this:
http://www.mvdirona.com/TechnicalArt...ateFailure.htm

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1996 Dodge Ram 2500 Cummins Turbo Diesel, 12V, auto, 4x4, long bed, long cab, 3rd gen 17" rims
--- KDP tabbed, 4" exhaust, steering box brace, Luke's linked track bar, home-ground #100 torque plate.

Diesel Dave2

I agree with Bill...I'm so sorry that I throw my orginal t-stat out...I have tried two different cummins t-stat and same thing....Blocked off the whole rad hasn't helped...I'm going with the fan removal now..Now my truck is under cooling and smokes more because its not up to operating temp....Not good for the motor...

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1995 Dodge,250K miles, regular cab dually,4X4,5 speed,4:10 gears,Wastegate blocked,15 degree timing,Polyurethane control arm bushings,BHAF,KDP Tabbed,Pyro & Boost,DSS,2003 trackbar upgrade,Steerring bushing,#0 plate,3K springs,215 injectors,Laser cut DV,Con OFE,full B100.

Mar 2008,
Dyno: 353HP/735 Ft Lbs

June 2008
Dyno:344HP/835 Ft Lbs

1978 Mercedes 450SL
1956 Chev 4 door Sedan
1977 T/A 400,4-speed
1963 Ford Falcon,2 door

Santaclaus

Take a look at: http://www.dieseltruckresource.com/d...elt+%23k080694
post # 33 & 38 ( in page 3 )

Mike

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92, Extended cab, auto trans, exhaust, boost, tack, oil pressure gauges. Pensacola, Fl.

infidel

That's very inventive, using a shorter belt to bypass the fan pulley.
Never thought of that one.

Easier to remove the fan on a 2nd gen though.
After you've done it a few times it takes less than a couple minutes start to finish.
Nothing needs to be removed except the fan if you do it by pushing back the upper radiator hose, pull the fan up so the oil fill is between two blades then rotate the fan clockwise.

If you're leaving the fan off for a long period store it standing upright.
If you lay it down flat sometimes the oil slowly drips out.

Diesel Dave2

Got my fan off and removed all the cardboard...Running the so called slow opening t-stat from cummins which has a lower operating temp but will elimate temp flucuations.Which it didn't get rid of the flucuations.