WWDiesel wrote:
Science and Energy wrote:
If I did a stock replacement it would still be at the low temp setting right or did mopar up the temp later?
Could someone destroy the thermostat inside the housing and simply install an inline immediately after? Sorta like gut it out. The advantage would be ease of service after and a higher temp setting.
An OEM thermostat would still be at the stock temperature. I believe the lower temperature was some kind of stupid emission thing to keep NOX down?
Only problem with using a gutted housing and in-line thermostat; the bypass circuit would be 100% open all the time and that is a straight shot from the housing to the water pump's suction inlet so you would be bypassing 100% all the time. That could cause overheating problems big time!!!
The bypass valve has to be in the circuit and functional at all times for correct engine warming and temperature control.
A fully operational OEM or HDS stat controls the bypass valve and closes it off proportionally while at the same time the main thermostat valve is opening up to send flow through the radiator. As the main thermostat valve opens, the bypass valve closes off and the main valve is open and modulating to control temperature at setpoint. The main valve and the bypass valves opening rates and positions are not fully linear with each other, but rather proportional in relationships with each other as they operate.
Both the OEM thermostat and the HDS thermostats perform these functions very well. An in-line stat
CANNOT perform this function period!!!
Basic diagram of how a bypass circuit functions:
This is one of the best explanations I have ever seen, and I really would like the link to the website that has this diagram. Please.
Yes, the OEM thermostat assembly performs its functions very well, but it is of poor quality and does not last very long. You also have the 176 degree opening temperature thermostat valve in that OEM assembly which runs your engine way too cool for best fuel economy and long term reliability. This valve was specified for North American Liberty CRDs to comply with the E.P.A.'s ridiculous NOx emissions standards. Even the European spec CRDs have an engine thermostat that is a little too cool for ideal operating temperatures.
This is why for the past several years people have been trying to raise the operating temperature of the CRD engine. Most of the ideas people have tried make fundamental changes to how the CRD engine's cooling system functions, and can cause serious problems if used for any reasonable amount of time. A couple of modified thermostats try to imitate the function of the OEM thermostat, but there are serious questions as to whether or not proper coolant flow is maintained, (and, ideally, increased to compensate for running the engine at higher operating temperature), and if the construction of the modified housing will hold up over time.
The Hot Diesel Solutions Model 001 engine thermostat assembly is the only aftermarket upgrade you can count on to function exactly like the O.E. part, but also reliably and safely run your CRD engine at a significantly higher operating temperature. It is also by far the highest quality and strongest option available, with extra features not available with the modified options.
