Simple Troubleshooting Tests for Nissan 300ZX Heater Core
The Nissan 300 ZX heater core is a real life saver when it comes to driving in cold weather. It uses the excess heat from the engine's combustion process to warm up the inside of your car's cabin. And because the heating system works through the proper function of the cooling system, when the cooling system malfunctions, the heating system also malfunctions. Here are some of the most common problems associated with a bad heater core and some simple troubleshooting tests you can perform:
Clogged heater core
A heater core will not work if it is clogged-it will not allow the antifreeze to flow within it. To check, disconnect the intake and exhaust hoses found between the radiator and the heater core by releasing the clamps. Use a pry tool to do so. Then use a garden hose to allow water into the intake hose into the heater core. If the water fails to come out of the exhaust hose, the core is definitely clogged and will need to be replaced immediately.
Leaking heater core
The Nissan 300ZX heater core is located near your car's dashboard. When it goes bad and leaks, you will not fail to notice a puddle of leaking antifreeze by the passenger side footwell, soaking up the carpet in the area. You will also notice the sweet smell of the leaking antifreeze. You can remove the heater core by taking off the dash using a screwdriver. When the heater core is out, inspect the radiator for any cracks and leaks.
Noisy heater core
A bad heater core will often make a lot of grinding, swooshing, clanking, and sometimes even gurgling noises. This is especially evident when you have just started your vehicle or just after the heater gets activated. The cause of this is most likely an air pocket inside the heater core. Another possible reason for this is having both the fuel tank and the radiator completely filled up with fuel and coolant, respectively.
Irregular heater function
When the heater core loses its integrity, the heater system is bound to function irregularly, going from cold to warm and then back to cold again. Your car's heater system will keep working like this unless you change the heater core immediately.