Engine Cooling problem
1964 Mercury Comet V8 Two Wheel Drive Automatic 31000 miles
If the temperature outside is over 85 degrees then the engine will over heat while at a stop light. The engine will cool down once the car is back in motion. The heater has been used on summer days to protect the engine from over heating. Not fun. With temperatures over 98 degrees then the engine over heats and not even the heater will help cool the engine. If the temperature outside is 45 degrees or colder then the car does not seem to heat up enough. On winter days the engine must warm-up in park for 15 minutes or more for the temp gage to reach normal temperature. After this warm-up period, the heater will warm the interior of the car and defrost the windshield. However, when driven in cold weather, the engine cools down and the heater stops blowing warm air. I have changed the thermostat three times, checking it by placing in boiling water. I have drained and flushed the radiator and the engine then refilled with mixed 50/50 coolant. Radiator and engine same number of miles. No obvious leaks have been found. Water pump flow test good. What else can I do?
Sunday, December 6th, 2009 AT 5:57 PM