cerberusaardvark
Well-Known Member
- Joined
- September 7, 2009
- Messages
- 331
- Reaction score
- 2
- City, State
- San Diego
- Year, Model & Trim Level
- 1994 Explorer xlt
So after running my top end rebuild for almost 5 miles, last night it occurred to me maybe the reason my temp gauge seems weird to me is because I may have installed the thermostat backwards.
Yesterday I was looking in the engine bay after a day of driving and normal operating temps and I noticed the coolant in the overflow box was above the cold fill line. I thought that's weird, when the engine is at optimal temp shouldn't most 94 the coolant be in the tube running? And when the engine cooled down, the level in the overflow box dropped to below the cold fill line. I thought, wouldn't it make more sense if when the engine is running cool it would push more fluid into the reservoir so the engine would warm up faster?
Or maybe my understanding of how the coolant flows is wrong. Engine starts, running rich to heat up, less coolant to retard rising temps, then engine leans out at normal temp, more coolant required flowing to maintain 190 degrees.
Not sure but mine seems to do the opposite, which might make sense if the thermostat is opening and shutting on the wrong side? Idk, looking for advice.
Yesterday I was looking in the engine bay after a day of driving and normal operating temps and I noticed the coolant in the overflow box was above the cold fill line. I thought that's weird, when the engine is at optimal temp shouldn't most 94 the coolant be in the tube running? And when the engine cooled down, the level in the overflow box dropped to below the cold fill line. I thought, wouldn't it make more sense if when the engine is running cool it would push more fluid into the reservoir so the engine would warm up faster?
Or maybe my understanding of how the coolant flows is wrong. Engine starts, running rich to heat up, less coolant to retard rising temps, then engine leans out at normal temp, more coolant required flowing to maintain 190 degrees.
Not sure but mine seems to do the opposite, which might make sense if the thermostat is opening and shutting on the wrong side? Idk, looking for advice.