Further to my thermostat issue, which has since been resolved with a new unit, my car is still over-heating under load. When the car returns to idle the temperature drops from 110-115 back to 90-95 within a minute or too. There's no coolant loss, and there's no oil contamination either.
1. The thermostat opens at the correct temperature, which in turn triggers the fan, however the top hose is only ever luke warm/hot at best even when the reader is showing 110 degrees.
2. The radiator is stone cold, top and bottom, and I've checked the bottom bleed screw to check for flow and that's fine so I don't think it's a blocked radiator.
3. When the temperature is 100-110 there's no pressure when the expansion cap is released.
So, given the points above, and particularly # 3 with the lack of pressure, I'm fairly sure the water pump has failed. So, the questions are:
1. Is there a definitive test for the water pump? I'm not overly convinced by the removal of the top return to the expansion tank to check for flow.
2. How long is a water pump change likely to change, assuming I'm fairly handy with a set of spanners? Further to that, is there anything I need to be careful of? I know the torque settings, other than that I only have trial and error at my meagre disposal.
Thanks in advance.
1. The thermostat opens at the correct temperature, which in turn triggers the fan, however the top hose is only ever luke warm/hot at best even when the reader is showing 110 degrees.
2. The radiator is stone cold, top and bottom, and I've checked the bottom bleed screw to check for flow and that's fine so I don't think it's a blocked radiator.
3. When the temperature is 100-110 there's no pressure when the expansion cap is released.
So, given the points above, and particularly # 3 with the lack of pressure, I'm fairly sure the water pump has failed. So, the questions are:
1. Is there a definitive test for the water pump? I'm not overly convinced by the removal of the top return to the expansion tank to check for flow.
2. How long is a water pump change likely to change, assuming I'm fairly handy with a set of spanners? Further to that, is there anything I need to be careful of? I know the torque settings, other than that I only have trial and error at my meagre disposal.
Thanks in advance.
