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Heavy Duty Heater Core Assembly Identifying the signs of a faulty heater core is essential to avoid inconvenience and expensive repairs. Common indicators include a lack of heat, a sweet smell inside the cabin, foggy windows, or coolant leaks. If these symptoms are noticed, it is advisable to have the heater core inspected and repaired by a professional technician. Diagnosis and tips: Removal and installation of the unit may vary depending on the application. It is recommended to follow procedures outlined in repair manuals. Leaks in the cooling system will cause multiple problems. The cooling system must never be low in coolant no matter the quantity for the following reasons: • Reduced heater core efficiency • Increase in engine temperature (overheating) • Damage cylinder head gaskets The radiator cap controls pressure in the cooling system to increase the boiling point of the coolant. It also controls fluid level between the radiator and overflow container to prevent air from entering the system. The coolant must be checked on a regular basis. Verify your owner’s or repair manual for testing and replacement schedule. Use only recommended coolant for your vehicle, especially for models using aluminum cooling system components. The thermostat regulates the engine temperature. It opens and closes the passage of coolant to the radiator. When defective, the engine may run too cold or too hot. Replace the thermostat every time you service the cooling system or replace a major system component. Electrolysis is a stray current caused by a bad ground from one of the vehicle’s accessories. Electrolysis occurs when electrical current routes itself through the engine’s coolant circuit in search of an electrical ground. The most common causes are poor grounding from add-on accessories such as stereo amplifiers or winches, remote starters etc.Cross References
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Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit www.P65warnings.ca.gov.
