tspark overheating -suspect water pump
Hi everyone, hope you are all having a good christmas. My 02 2.0 tspark 156 sportwagon is not...
Driving to work the other day I (luckily) noticed the temp gauge heading for the red so I quickly stopped and while waiting for recovery noted the following:
Heater not blowing hot, top rad hose warm, bottom hose & rad cool, coolant level ok, no water in oil or oil in water. AA man pressure tested the header tank and advised there was pressure but the gauge was not responding to throttle input so likely causes were either a blockage in the system (ice) or a u/s water pump.
Next day, starting from cold observations are as before: all levels ok, no oil/water mix, temp gauge reaches norm unusually quick (a few mins even though only 2 degrees outside), heater does not blow warm, top hose is cold but I choose to shut the car down after about 5 mins as the temp gauge reads above norm and the fans come on. Opening the the header tank cap only gives a little hiss.
Rad was changed 2 months ago and new antifreeze from a new tub put in with a ratio of 36%. When the overtemp happened it was about -6 outside but we have had temps to -12 without problem.
Based on all of the above I am fearing the waterpump has gone. Do you agree? Is there a little test I can do (in the 5 mins I can run the car for) to confirm?
Any help greatly appreciated,