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Cummins Thermostat - 98.5-07 5.9L, 3.9L 4BT Cummins Engines

Thoroughbred Sku #: CUM5292742
Manufacturer Sku #: 5292742

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Product Details

Product Name: Thermostat - 1998.5-2007 5.9L Cummins, Applications with 3.9L 4BT Cummins Engines
Manufacturer: Cummins
Manufacturer Part #: 5292742
Thoroughbred Diesel Part #: CUM5292742
Fitment Notes: Cummins Thermostat - 1998.5-2007 5.9L Cummins, Applications with 3.9L 4BT Cummins Engines - 5292742

Thoroughbred Diesel is your source of diesel stock parts for your Dodge Diesel. We are also a real diesel repair shop that works on diesel trucks for free advice call toll free at 866-737-4966 or shop now for 1998.5-2007 5.9L Cummins, Applications with 3.9L 4BT Cummins Engines Diesel Thermostat. At Thoroughbred Diesel we specialize in stock parts for Dodge Cummins Diesels Trucks so save big bucks by shopping for replacement stock parts at ThoroughbredDiesel.com. Thermostat Type: Jiggle pin Thermostat Opening Temperature: 180° F Thermostat Fully Open Temperature: 203° F Vented/Non Vented: Vented Requires By-Pass Housing: No Required Housing Bore Diameter (mm): 61.4 4 Valve Cylinder Head


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  • I have a 1998 Ram 3500 I bought new, I'm getting ready to replace the entire cooling system. I don't use it for work or towing anything and drive it very little now. What thermostat should I put in it a 180 or 190 degree, I don't now which it one it came with ? It has just over 240,000 miles on it now, everything is stock on it. Would it make a difference which thermostat I use ? I live on the Gulf Coast lot of heat and humidity.

    RJ | 3/3/2021

    180 degree thermostat is stock replacement.

  • My 1999 Winnebago Chieftain motorhome use Cummins 5.9L diesel. I installed PN: 5292712 thermostat I bought from you. However it runs TOO hot and makes climbing hills very annoying; as I have to slow way down to avoid overheating especially when the weather is in the 90's. Once warmed up the engine temp stays at about 208 and climbing hills sets off the overheat alarm which comes on at about 212. Is there a lower temp thermostat available to fit this engine. Please advise.

    Robert J Marshall | 7/6/2020

    Where you having a heating issue before replacing the thermostat? You may have another issue. this is the proper thermostat for your model Cummins.