94-98 Dodge Ram Pickup Non-Temp Cycle Thermostat Fits 12 Valve Cummins Diesel

  94-98 Dodge Ram Pickup Non-Temp Cycle Thermostat Fits 12 Valve Cummins Diesel

$37.95


End Date: Thursday Jul-19-2018 19:14:32 PDT
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eBay       I will ship this very special high quality thermostat anywhere in the world using a Priority Mail International small flat rate box. Even though it is not shown in the photo yet, I also include the proper molded rubber gasket that will fit the majority of the applications for this thermostat. That way, you will have everything you need to change out your thermostat and will not have to make a special trip to your favorite automotive parts house. My foreign customers especially appreciate the fact that I include the proper gasket.      This special thermostat is made here in the USA and will forever end the very un-desirable temperature cycling problems common to the early Cummins 4BT and 6BT Diesel engines. This part measures 63 mm (or about 1/32" under 2-1/2") in diameter. It fits the 12 valve 6BT Cummins 6 cylinder Diesel engines used in the 1994-early 1998 Dodge Ram trucks and many other applications such as some Ford and Freightliner medium duty trucks, farm tractors, grain combines, motor homes, boats and hundreds of other applications as well. This thermostat will also fit some of the applications of the 4BT 4 cylinder Cummins Diesel engine used from the same period and perhaps even a bit later. Please check the diameter of your thermostat and let me know before you order if you possibly can.       I can supply two versions of this thermostat. The most popular version is marked 195 degrees but the engines normally run about 180 to 185 degrees with this version. I can also supply a version marked 180 if you prefer that your engine runs about 165 to 170 degrees. I recommend the warmer version marked 195 over the cooler version marked 180. That extra 10 or 15 degrees makes quite a difference in how well your heater works in cold weather. Please double check the diameter of your thermostat if possible if it is not from a 1994-1998 Dodge Cummins or call me at 406-799-1847 for assistance before you place your order here.      I am also offering a similar smaller non-temperature cycling thermostat for the earlier 1989 to 1993 12 valve Cummins Diesel engine equipped Dodge trucks and other Cummins equipped vehicles of that vintage here on eBay on a different listing. Please check that listing if you own an earlier Dodge Diesel that has a temperature cycling problem. I am working on testing a special thermostat for the 1998 and later Cummins 24 valve engines and hope to have some results soon. Hopefully, that thermostat will end the temperature cycling problems common to a lesser percentage of the later 24 valve engines.            I have been a loyal fan of the Dodge Cummins Diesel powered trucks since I bought a nice used 1997 model about 13 years ago. As I was driving it home, I noticed that the coolant temperature would not stay uniform but would change about 3 times a minute. It would go up to around 180 degrees and be there for a few seconds before the gauge needle would drop quickly down to around 140 degrees or so. This temperature cycling would go on almost all the time regardless of the outside air temperature, road speed or the load my vehicle was subjected to.      I figured something was wrong so I stopped at our local Dodge dealership soon after I bought the truck. The service manager was very friendly and assured me that temperature cycling was typical of the Cummins engine. He was even nice enough to show me a copy of a service bulletin that Chrysler had sent to dealers that mentions the problem. The bulletin attempted to assure customers that temperature cycling was normal and not a problem.      Well, I was born at night but it was not last night so I went away from that dealership vowing to never depend on either Chrysler or Cummins to fix any problems I might have with that vehicle or engine in the future.      I studied mechanical engineering in college and learned about what happens as materials change temperature. Generally, as materials become warmer, they expand and get larger in size. As they cool off again, they become smaller as they shrink back to their original size. As far as I am aware, water is the only exception to this rule as it changes phase when liquid water freezes or solid ice melts. Liquid water at 32 degrees expands as it turns into solid ice. As that ice expands, it becomes less dense and floats on top of liquid water.      Have you ever considered what would happen if that were not the case? If that were not the case, water on the top of rivers and lakes would freeze first and then soon settle to the bottom. This would eventually make the entire body of water turn into a huge ice cube. The rivers would be blocked up which would cause massive flooding and most of the animals in the water would die in the winter. So what do you think about that? I think planning from a superior power had to be involved there a long time ago.       The Cummins engines often develop leaking head gaskets on the right front corner of the engine just below the thermostat housing after about 200,000 or miles of use. I believe that the temperature cycling of these great engines is a major factor in causing these common and eventual head gasket leaks. Every time the temperature of the coolant changes, the cylinder head will move relative to the cylinder block at least a tiny bit. Every time there is movement between the cylinder head and the cylinder block, the gasket and sealing surfaces of the cylinder head and cylinder block may wear a tiny bit.     An engine that runs about 200,000 miles that temperature cycles about 3 times a minute will go through about a half million temperature cycles. Multiply the minute gasket wear mentioned above several hundred thousand to a half million times during the life of the engine and it is no wonder that the gasket finally lets go and starts to leak coolant.      I was determined to fix this engine temperature cycling problem about 12 years ago so I bought a new thermostat from the Cummins dealer in Billings Montana. The parts man there was very helpful and was aware of my concern about the temperature cycling problem. He mentioned that he had a special thermostat in stock that would end the problem. I ordered one immediately and spent about an hour and a half installing it as soon as it arrived. I was very disappointed to find that the problem was very slightly better but that it certainly was not solved.      I then went to the parts department at our local Case-IH farm equipment dealership. Tennaco was a large company that owned Case-IH at that time as well as Cummins. It made sense that Cummins engines would be used in Case-IH farm tractors, grain combines and probably other equipment. I tried two more different genuine Cummins thermostats from the Case-IH dealer with no success.      I then bought at least five different aftermarket thermostats from the local automotive parts houses and none of them fixed the problem either. I resorted to making a shutter for the front of the radiator. Otherwise, the heater in my truck was nearly worthless in very cold weather during the winters here in Montana. The problem with a shutter that is not automatically thermostatically controlled is that it can be forgotten about resulting in an over heated engine or automataic transmission.      About a year and a half ago, I found a source for the thermostat I am offering here and installed one in my second truck which is a 1994 Dodge Diesel. I was so happy that I became absolutely ecstatic with the results. The engine warmed up noticeably quicker and the cab heater worked much better than it ever did before. The sooner a cold engine warms up, within reason, the better it is because there will be less sludge forming in the engine oil and crankcase. The sooner a cold vehicle warms up, the safer and happier the vehicle owner or operator will be so that becomes a win - win situation.      Before I found the thermostat I am offering here, I changed thermostats so many times that I kept a bucket full of tools handy that had everything I needed to change one. I was eventually able to do the job in under half an hour. Now I don't need to worry about that job anymore so those tools are back in my tool box where they belong.     I can supply both 180 degree and 195 degree thermostats at this time. The stock Cummins thermostat is a 180 degree unit. My 180 degree unit usually runs at about 165 degrees or so which is a bit colder than the stock Cummins unit does at the peak of it's temperature cycle. The 195 degree thermostat I am offering seems to run about 10 degrees warmer than most of the stock Cummings 180 degree thermostats I have tried. I run the 180 degree units in two of my trucks and have had no problems with either of them. The 195 unit might be a better choice if you live in colder climates and want a warmer heater faster when you start up. I have sold several hundred of each and have had no unhappy customers with either version so the choice is strictly up to you.      Please let me know which unit you prefer if you order one. Otherwise, I will ship the 195 degree version which is the one I now recommend. I have the 195 degree version in my third Dodge Diesel truck and really like the way the heater works in that truck. Generally, an engine will run more efficiently at 190 degrees than it will at 165 degrees.           I will ship this thermostat anywhere and have shipped some of them to foreign countries including England, France, Belgium, Spain, Sweden, Australia, New Zealand and The Netherlands. I have received only happy feedback from my customers as you can see. The only return I have had so far was when I shipped the wrong temperature version by mistake. Here is your chance to end your Dodge Diesel engine temperature cycling problems once and for all, extend the life of your engine and fix your Dodge cab heater at the same time. Thanks a lot, Bob Woodburn - phone 406-799-1847 in Bozeman Montana

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