Doing the hose replacement I noticed the old and new thermostat were rated at 84c or 183.2f......

Thats is a low temp for a T-stat.

 

That is correct. 185 F is when coolant gauge needle hits center scale (and stays there until about 230 F).

The aftermarket low temp thermostat for these cars is 170 F.

 

10-15 degrees make big difference

 

Oh no not again

 

Well,I am a social person so I do enjoy the casual convo.

 

It's the incorrect belief that running a lower coolant temperature will result in additional power, reduced fuel consumption, longer engine life or any of the other old myths and misconceptions. It's all been thrashed many times here and on other boards.

 

It subjective to the motor. A small block chevy 305 responds well from a 205 degree to a 180-160.

It seems the jag motor is set up well

 

But of course there is no *one* person who is the arbiter of all that is deemed to be "old myths and misconceptions".

Good reading can be found in technical papers published by the manufacturers of coolant hoses who have studied the long term effects of elevated operating temperatures on the goods they engineer and sell.

 

My prayer!

Oh lord I fear for what I have created here today////



LOL


Hey my car is running great!