I wasn't suggesting that he ditch the Evans. Im saying that the Evan should work like its supposed to with a different type of thermostat.

 

I have not noticed a significant change in temperature with the Evans vs Peak. I track temps with a Scangauge.

 

Sure. I don't think Evans claims lower running temperatures, although I suspect your ScanGauge should show slightly higher vs. glycol based coolant + water. I think they do claim virtually zero pressure, higher boiling point (375 degrees), no corrosion, and lifetime vehicle service (never needs replacing).

 

I'm not sure I follow your train of thought. Temperature is what opens/closes the thermostat not system flow or pressure or what kind of coolant you run. Changing the flow circuit to an in-line setup may improve thermal efficiency (based on posts I have read) but I'm thinking the thermostat continues to do its job no matter what kind, where you have it in the system or what sort of liquid touches it.

Not trying to be difficult just looking for the best answers since I'll be firing up my newly rebuilt 4.6 soon and want to get my cooling setup correct out of the gate so I can reliably drive the vehicle or sell it on worry free.

 

I went to napa to get a new battery and oddly enough at the same time the flex a lite controller system was overloaded just past the fuse. Not exactly sure what happened, but am in the lurch waiting for a Ron Francis unit which will be heavier duty.

I am going to hook the fans up individually to see if maybe one of the fans went bad. Got that advice from ron francis. We'll see what happens.

 

FYI with the Stock Fan the truck runs at 193-198 in city trafiic with Evans waterless coolant.

 

I think anything under 200 in city traffic in the Summer is a win. Assuming A/C running? If so you are golden.

 

everyone on here claims that the LR style of thermostat is not only temp-based but also works off of pressure. that's what I'm getting at. if this holds any truth, the Evans wouldn't work well with the LR thermostat. BUT, with a traditional Tstat like we use on the inline setup, system pressure wouldn't delegate when and how the stat opens and the Evan would be free to work as it is designed. I haven't done any reading or research on any of this, it was just a thought that came up, so if I were using Evans and the LR Tstat, I would be tempted to acquire more info and see how much of this is legitimate.

 

If you are about to put ignition to a newly rebuilt 4.6, I HIGHLY suggest using the inline Tsat if you haven't already planned to. It works incredibly well at maintaining a consistent operating temp as opposed to the LR bypass system. The LR block becomes more and more unreliable as the engine temp increases so unless you have the sealed and flanged cylinder liners, I would have that motor running under 190f. Lots of threads on noises and cyl-sleeves moving at temps even just barely over 200. But as long as the temp stays cool enough to keep the aluminum block from expanding, then the liner theoretically will never move and cause those notorious issues that this block is known for. I haven't owned dozens of Discos, or wrenched them for 20 years, but I have read enough to personally take caution with coolant temps.

 

I don't see how that could be correct. As soon as the thermostat opened the pressure on either side would equalize. That is, if both sides of the thermostat weren't already connected, but they are so the pressure would be equal even before the thermostat opens. The only pressure that could change how the thermostat opens would be the pressure of the coolant flowing as it's pushed by the water pump.