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**Intockatt** · 08-25-2007, 03:19 AM

Pop off the cap to the radiator while the car has been off for awhile. If you checked the reservoir, that doesn't matter if it is empty of filled to the top.

If the radiator is empty, or not filled up to at least near the top, fill it up with water, run your car for a while and see if there are any leaks. Then fix what is leaking. Straight up water is fine for this test.

If your radiator is full of liquid, then it could be something else like the water pump. Thermostat kicks in to tell the pump to start pushing the water through the motor, and may not be kicking it to do so.

Water in a radiator is fine anyways. You usually have a 50/50 ratio for antifreeze and water, but it is ok to have a little higher water mix, at least in the summer time.

08-25-2007, 03:19 AM	#2
Intockatt Join Date Oct 2005 Posts 653 Senior Member	Pop off the cap to the radiator while the car has been off for awhile. If you checked the reservoir, that doesn't matter if it is empty of filled to the top. If the radiator is empty, or not filled up to at least near the top, fill it up with water, run your car for a while and see if there are any leaks. Then fix what is leaking. Straight up water is fine for this test. If your radiator is full of liquid, then it could be something else like the water pump. Thermostat kicks in to tell the pump to start pushing the water through the motor, and may not be kicking it to do so. Water in a radiator is fine anyways. You usually have a 50/50 ratio for antifreeze and water, but it is ok to have a little higher water mix, at least in the summer time.
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