AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
Yes.. water pump failure would make the car overheat, as would a failed head gasket.
When the system is cold, open the bleed valve on the back of the radiator (probably top left hand side as you look into teh engine bay) ... just enough to let either air or coolant come out.
Don't unscrew it tooo far or it will fall out and you won't be able to get it back in as coolant is gushing out.
If air comes out (it hisses) let it continue until coolant starts to come out. When/if coolant comes out, do up the screw and top up the coolant in the header tank, if it needs it.
Use the car and see if the problem persists.
If the problem appears "solved" check the radiator for air again after a few days. If you have more air, then bleed it again and repeat... though after a couple of times it suggests that you have a leaking had gasket.
If there is no air in the rad' (just coolant) and the beast still overheats, then the thermostat could be failing to open or you have a duff water pump. If you have a spare (old?) thermostat, then fit that and try it again...
If you have a head gasket or a water pump problem then it's a bigger job that also involves removing the cam-belt and tensioner... so fit new ones. Saves doing it again fro 36,000m / 3 years. Also replace the water pump (£30) so that's new too.
No bullets for Chaingun..