Originally Posted by smokin63
ever since i bought my car it has been temp sensitive . If it is hot outside it will get excessively hot just at a idle . I am starting to question the fluid flow through the cooling system . almost think there is a partial obstruction . is there a way to test it ?
while the car is moving it seems to be much better , its a mild chevy 350 . I have run it with the radiator cap off and you can see the water level drop when the thermostat opens at 165 degrees . It will get hot if i start to really load the motor and is sensitive to the air temp . if it is hot out it will get hot much easier .
- What car, what engine, what radiator, where do you live?
- An engine will warm faster on hot day than a cold one.
- Temp climb at idle is usually associated with insufficient air flow or running undersize pulleys if the engine cools OK at cruise.
- Typical cruise should be about 10 degrees above thermostat, more than that shows insufficient coolant flow thru the radiator, especially if it doesn't over heat on extended idle.
- Or the cooling system is simply too small, this like a poor flowing radiator will just keep getting hotter. If this happens on long pull or at high speed, it's also a sign that system flow thru the radiator is too low.
- Fixing the above 2 problems should start with a new and or larger radiator, not a high volume pump. Except at continuous high racing speeds a lack of pump flow is seldom a problem.