[Arto65FB]

What is the water temperature in the lower hose from rad to water pump? I was asked that should electric fan switch sending unit be in the lower hose. I started wondering different positions where to plug the sensor and it must of course depend on the sensor heat range. Do I have a clue of what I am talking about?

Door handle first when cornering

 

[R100RT]

Ok, I will take a shot. The upper rad hose has water going to the rad so it should be at T-stat opening temp. The bottom hose would be about 20 degrees cooler. Try using the bottom hose and set the T-stat for 165. Try it. After a trip at hwy speed, you should pull off and idle and hear the fan come on.

 

[Blues Power]

20 to 30 degrees cooler assuming stock system and everything working correclty