I have been going nuts to stop my car from overheating and still can not to this day. I put in a new radiator, tried two new thermostats so I know its not that. I have also changed the lower radiator hose, bypass hose, made a loop so the coolant does not cycle through the heater core because I was using it as a second radiator until it no longer blew hot air one day. I have also replaced the coolant temperature sensor to make sure I was getting the most accurate reading. The car gets into the really hot state within min of driving now. Last week the temperature would change from hot to about operating range to almost hot then go back down. I could make it to work with letting it get hot. But now over the weekend when driving to test things it would go hot range and not go back down till it cooled off a little bit. I am not sure if it is water pump or not because I ran it and did see bubbles coming up after making sure it was full but the air could be escaping. Did not notice any water or coolant in oil. I also looked at the exhaust and with a flash light it did look white but was not a stream of white smoke. There was a little condensation after running it awhile but I believe that is normal. It does not seem the head gasket or cylinder head is cracked. I also did not notice any leaks around the water pump. When it was changing in temperature the coolant level remained constant. I did not test to see if the pulley on the pump was because it is inline with the timing belt if I am correct. I am not sure when the water pump was last replaced because I was not the orignal owner. Do you have any suggestions? Should I try replacing the water pump?
Mar 2, 2009 at 12:09 AM