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
What make of vehicle? Diesel or gas? How old is it? What does the engine oil look like? It is black or milky? Do you get white smoke when you're going up hill?
Your best bet is to go to a good shop and have them test the cooling system. They can do a pressure check on the cooling system and check the radiator cap. A bad radiator cap can cause overheating.
Radiators get clogged with rust and casting sand and won't flow enough coolant. If the thermostat sticks open the coolant doesn't stay in the radiator long enough to cool. Hoses can collapse and not flow coolant. Electric thermostats that control the fans can go out. There's a dozen possibilities.
Your best bet is to go to a good shop and have them test the cooling system. They can do a pressure check on the cooling system and check the radiator cap. A bad radiator cap can cause overheating.
Radiators get clogged with rust and casting sand and won't flow enough coolant. If the thermostat sticks open the coolant doesn't stay in the radiator long enough to cool. Hoses can collapse and not flow coolant. Electric thermostats that control the fans can go out. There's a dozen possibilities.
