CLSegraves
NAXJA Forum User
- Location
- Phoenix, Arizona
01 XJ
I just replaced my factory water pump (and t-stat neck) with a Wesco high flow pump (and neck). Prior to the water pump swap, idle temp was around 180-185. Now it's idling at around 200. If I idle up to 2500 RPM, the coolant temp comes down to 185.
The cooling setup consists of:
- 3 core aluminum radiator
- Volvo 16" 2 speed fan
- 180 degree T-stat
- expansion tank mounted on firewall (self purging system)
I'm measuring a 60 degree temp drop across the radiator (hot tank at 195/cold tank at 135) using an inferred temp gun (painted tanks black to get reliable reading with temp gun). I seem to remember reading somewhere that high temp drop across the radiator means insufficient water flow (water's moving too slow) but would expect the new Wesco pump to be moving more water than my old 150K mile factory pump.
Ideas? I called Wesco but they wanted to blame the issue on the 180 t-stat and fans, even though those were there beforehand.
I just replaced my factory water pump (and t-stat neck) with a Wesco high flow pump (and neck). Prior to the water pump swap, idle temp was around 180-185. Now it's idling at around 200. If I idle up to 2500 RPM, the coolant temp comes down to 185.
The cooling setup consists of:
- 3 core aluminum radiator
- Volvo 16" 2 speed fan
- 180 degree T-stat
- expansion tank mounted on firewall (self purging system)
I'm measuring a 60 degree temp drop across the radiator (hot tank at 195/cold tank at 135) using an inferred temp gun (painted tanks black to get reliable reading with temp gun). I seem to remember reading somewhere that high temp drop across the radiator means insufficient water flow (water's moving too slow) but would expect the new Wesco pump to be moving more water than my old 150K mile factory pump.
Ideas? I called Wesco but they wanted to blame the issue on the 180 t-stat and fans, even though those were there beforehand.