Engine/Transmission (1998.5 - 2002) Thermostat Question 2001

[Shelby Griggs]

I just bought a new thermostat from the local International heavy truck place, it is a genuine Cummins part #3946849. I just searched a bunch of old thermostat theads, this does appear to be the correct number for a Cummins 190° thermostat. The parts guy was new and so I don't have a lot of faith in his ability. He was saying the part number had been superseded at least once. I can't find a temperature stamped on the thermostat which I find a bit odd. Also this part has a moulded rubber seal as a part of the unit and he was telling me no "O" ring is required. Can somebody confirm that I have the right part for a 2001 and also whether I am getting the correct story on the "O" ring. I am getting ready to replace the hoses, thermostat and coolant and would prefer to not have any surprises after I get it all apart.



BTW, this was a pricy thermostat, $59. 86. Their Fleetguard ES EG premix was $10. 02 per gallon which I thought was reasonable.



TIA



Shelby

 

[24V-DSL]

Hey Shelby...



Call Cummins NW (PDX). 888. 289. 0900. Very helpful and knowledgable.



Joe

 

[bmoeller]

http://dodgeram.org/tech/dsl/cooling-sys/thermostat.htm

 

[JHerrlich]

The thermostat I took out of my '01 was a 190 degree thermostat. I replaced it with the newest model out of the 3rd gens. The price was around what you paid for yours. The new thermostat is a 180 degree thermostat with a slow reaction time. It won't snap open and shut like the old thermostat.

 

[SnoKing]

The thermostat I took out of my '01 was a 190 degree thermostat. I replaced it with the newest model out of the 3rd gens. The price was around what you paid for yours. The new thermostat is a 180 degree thermostat with a slow reaction time. It won't snap open and shut like the old thermostat.

Part Number? SNOKING

 

[JHerrlich]

Part Number? SNOKING

I'll have to ask Pablo when I see him. He's the one that ordered it for me.



I know the oldest one was superceded with one that wasn't prone to breaking as much. The new 3rd gen one is totally different looking.

 

[HeavyHauler]

This came from an older thread but I have the part number being 3954194 for a 180* and 3937171 for a 190*. Perhaps they've changed them but these are supposed to be the Cummins part numbers for our trucks.