Overheating, the old traditional turning on the heater actually brings the temp down to normal. Never had a vehicle on which that the gimmick ever worked. Been told this might be due to fan clutch.
That can be the case, and trying the old heater trick is definitely a last resort. Clutch fans can have the appearance that they are functioning properly, and can even feel like enough air is being pushed into the engine compartment. The clutch does wear out over time, and lose the ability to provide the necessary airflow to cool the engine. One way to test the fan, is to try to spin it while the engine is off. You should feel some resistance and the fan should not spin freely. If you are not sure about the amount of resistance that the fan clutch should have, there is a way to test it. *PERFORM THIS AT YOUR OWN RISK* You will want to put on a leather glove that has a somewhat snug fit, and while the engine is off, hold the tip of one fan blade, and have someone start the engine. You should be able to hold the fan still while the engine pulleys continues to revolve. As the engine starts to warm up, the clutch fan will start to build up pressure, which you will feel gradually building. You should not be able to hold the fan still when the engine is at the normal operating temperature. Before replacing the clutch fan, I would recommend that you inspect and replace the radiator pressure cap if needed, a faulty pressure cap will not allow the cooling system to build the necessary pressure which is needed to cool the engine, and I would recommend that you inspect/replace the engine thermostat if needed. If the thermostat is sticky, it can cause the engine to overheat as well.
I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!
Oct 01, 2013 |
Cars & Trucks