can a bad heating core cause overheating?
The engine is designed to run hot for excellent efficiency, but not to overheat and damage components due to overpressure or loss of coolant. Some say that overheating engines are a typical weakness of old cars and anyone who owns one will get stuck and steamy on the side of the road.
We say that's not necessarily the case. When these old cars came off the assembly line, they had no overheating issues, so they clearly had adequate cooling systems (This is especially true, but many cars during their development were never tested in the Arizona summer or similar climates, as many do. car . . at this time) .
It's just that after decades without regular maintenance or complete repairs, auto parts, radiators, engine blocks, hoses, fans, and belts get old and may not work as efficiently as when they were new.
If the temperature gauge in your car shows that the engine is running slightly hotter than usual on short or long trips, don't wait too long to see what your car has to say. That doesn't mean you have to start fiddling with the car's cooling system, but perhaps a series of tests and preventive maintenance could be the cure for keeping your classic cool.
1 . Belt and hose
Replace any torn, cracked, or slipped belts on the water pump and cooling fan. Perform a thorough inspection of all hoses for cracks, swelling, and signs of leakage. A good rule of thumb is to check the car's belts and hoses with every oil change and change them every five years regardless of how many miles you put in the car.
2 . Radiator
Check the radiator front for insects and excess dirt - this can be removed with any garden hose with a pressure nozzle attached.
Look for small leaks that will appear with an accumulation of white or green deposits anywhere in the tank or canister. This can be easily fixed by hot or cold welding, we recommend adding radiator sealant which only complicates matters.
The problem with sealants is that they can block the flow of water in the radiator core and reduce the seal of the water pump, thereby reducing efficiency.
If you haven't replaced the radiator cap washer in a while, do so. This is an inexpensive but essential part for proper pressure of your cooling system.
To check for blockages that may have developed inside, disconnect the lower radiator hose and run the water through the top, the water should leave the radiator at the same rate it entered.
Otherwise, rinsing the radiator very often can open a clogged coolant tube. On older radiators, this process may need to be repeated several times as re-flushing can distribute sediment throughout the radiator and cause major problems like the one we found on the Jaguar E-Type a few years ago.
The car's thermostat is what regulates the circulation of coolant through the car's cooling system - it stays closed when the car is cold and open when it's hot. As the thermostat ages it can fail and stay closed which will cause your car to get very hot...fast. If your radiator, belt and hoses are in good condition and the car is still overheating, replace the thermostat.
4. Frozen Plug
Freeze/Core spark plugs are usually located on one or both sides of the engine block and are designed to protect it from freezing. But over time they can also become areas where water can leak from the cooling system and cause overheating. The worst thing is that when they leave, it's always at the worst possible time.
Once you find where the freeze/core plug is on your particular machine, a send cry sign will be visible. The ease or difficulty of replacing a leaky leak varies depending on its accessibility.
5. Head Gasket
A broken or damaged gasket will cause coolant to leak from your cooling system and you will find evidence in your engine oil or you may find oil in the coolant. After all, it was a mess and the engine will eventually overheat. Frequently checking your fluids will help fix this problem before serious damage occurs.
6. Core Heating
Check the heating box, if you have one, for signs of cold crying. Heating cores can easily rust from the inside out and you can install a heater bypass to solve this problem quickly until you can find a new heater core.