How do I know my cooling fans are working
There a a few tests you can conduct here. Firstly, put power directly to your fan(s) Run two new wires directly from the battery to the + and - of the fan motor. Be careful doing this, as there is a risk of shorting the battery to earth. Maybe connect up the fan end before touching the wires onto the battery terminals. This will prove if your fans actually work. They should spin up to speed. Next, test the fan thermostat. There should be a terminal connection somewhere. One side of the fan wires would be connected to the thermostat. You will likely need a voltmeter to do this test. The thermostat is just a switch that should operate after a certain temperature is reached. Normally you would have to remove the thermostat from the car engine to test it, but it might be possible to test it when it's still installed. Next, test or replace the radiator thermostat. If coolant is unable to flow through the radiator after the engine warms up, you will get overheating. After a short warmup period, the radiator thermostat should open and allow coolant to flow through the engine block. Next, when the engine is running, check the exhaust pipe for water. Some water might be normal, until the engine is hot, but if a lot of water is evident, then maybe the block has been cracked. Best test for that is a cylinder compression test, with a compression gauge. Lastly, please do something positive about this. There is a great danger you will crack the engine block, especially if you are adding cold water/coolant to a very hot engine. Remember: does the fan run off direct power? Is the fan thermostat switching correctly? Does the radiator thermostat work correctly? Is the water pump working correctly? Hope this helps. Regards,