Engine overheating
Can old antifreeze cause the engine to overheat. The tester shows that it is still okay for minus 45 degrees celsius.
Forum Discussion
eric1514 wrote:wcjeep wrote:
x2 Fan Clutch? An infrared heat gun is great at troubleshooting. The cheap ones are $25. The cheap ones will likely be off by 2 or 3 degrees. Not a big deal in this scenario. Don't forget to use the infrared heat gun to verify the brakes are not dragging.
What's a heat gun going to tell him that he doesn't already know, that is, the engine is overheating. I'll grant you, they are great for brake issues like you mentioned, but hot engines?:h
The most important thing the temperature gun can tell you is in and out hose temperatures of the radiator. If there is a very large difference, you might have reduced flow do to stuck thermostat or plugged up passages in the engine or radiator. If the temperatures of the hoses are close together, you probably have a reduced airflow to the radiator.
You used to be able to use the gun to check for hot and cold spots on the radiator, but now you can't often get to the radiator well enough because of condensers and shrouds.
