After 02/14/13.

Radiator Cap – Mopar (5278697AA)

The Mopar Radiator Cap (5278697AA) is a Genuine OEM cooling system component engineered to maintain proper system pressure and regulate coolant flow between the radiator and overflow reservoir. The radiator cap plays a critical role in raising the boiling point of engine coolant, preventing overheating, and ensuring consistent thermal management under varying operating conditions. Manufactured to Chrysler, Dodge, Jeep, and Ram factory specifications, it delivers precise pressure control and reliable sealing performance.

Constructed with a durable metal cap assembly, calibrated internal spring mechanism, and high-temperature rubber sealing gasket, this radiator cap is designed to withstand continuous heat cycles, pressure fluctuations, and coolant exposure. The internal pressure valve is precisely rated to OEM specifications, allowing the cooling system to maintain correct operating pressure while safely venting excess pressure when necessary. The sealing surfaces are engineered to prevent coolant leaks and air intrusion.

The 5278697AA radiator cap is developed as a vehicle-specific direct-fit component, matching original pressure rating, neck dimensions, and sealing configuration. Maintaining OEM pressure calibration is essential to prevent coolant loss, overheating, hose stress, or radiator damage. Using an incorrect cap with the wrong pressure rating may compromise cooling efficiency or create excessive strain within the system.

For professional technicians, installing a Genuine Mopar radiator cap ensures compliance with manufacturer cooling system standards during service or repair. For experienced DIY vehicle owners, selecting an OEM cap eliminates uncertainty in pressure rating compatibility and restores factory-level cooling system operation without modification.

Proper cooling system pressure regulation is essential for preventing boil-over, maintaining stable engine temperatures, and protecting internal engine components. Replacing a worn or weakened radiator cap helps maintain consistent coolant circulation and long-term reliability.

• Genuine Mopar OEM radiator cap

• Calibrated internal spring for accurate pressure control

• High-temperature rubber sealing gasket

• Designed to maintain proper cooling system pressure

• Vehicle-specific direct-fit configuration

• Supports efficient thermal management and overheating protection

If you are addressing coolant leaks or performing cooling system maintenance, the Mopar Radiator Cap (5278697AA) provides factory-accurate fitment, dependable pressure regulation, and reliable OEM cooling system performance for your vehicle.

After 02/14/13.

Radiator Cap – Mopar (5278697AA)

The Mopar Radiator Cap (5278697AA) is a Genuine OEM cooling system component engineered to maintain proper system pressure and regulate coolant flow between the radiator and overflow reservoir. The radiator cap plays a critical role in raising the boiling point of engine coolant, preventing overheating, and ensuring consistent thermal management under varying operating conditions. Manufactured to Chrysler, Dodge, Jeep, and Ram factory specifications, it delivers precise pressure control and reliable sealing performance.

Constructed with a durable metal cap assembly, calibrated internal spring mechanism, and high-temperature rubber sealing gasket, this radiator cap is designed to withstand continuous heat cycles, pressure fluctuations, and coolant exposure. The internal pressure valve is precisely rated to OEM specifications, allowing the cooling system to maintain correct operating pressure while safely venting excess pressure when necessary. The sealing surfaces are engineered to prevent coolant leaks and air intrusion.

The 5278697AA radiator cap is developed as a vehicle-specific direct-fit component, matching original pressure rating, neck dimensions, and sealing configuration. Maintaining OEM pressure calibration is essential to prevent coolant loss, overheating, hose stress, or radiator damage. Using an incorrect cap with the wrong pressure rating may compromise cooling efficiency or create excessive strain within the system.

For professional technicians, installing a Genuine Mopar radiator cap ensures compliance with manufacturer cooling system standards during service or repair. For experienced DIY vehicle owners, selecting an OEM cap eliminates uncertainty in pressure rating compatibility and restores factory-level cooling system operation without modification.

Proper cooling system pressure regulation is essential for preventing boil-over, maintaining stable engine temperatures, and protecting internal engine components. Replacing a worn or weakened radiator cap helps maintain consistent coolant circulation and long-term reliability.

• Genuine Mopar OEM radiator cap

• Calibrated internal spring for accurate pressure control

• High-temperature rubber sealing gasket

• Designed to maintain proper cooling system pressure

• Vehicle-specific direct-fit configuration

• Supports efficient thermal management and overheating protection

If you are addressing coolant leaks or performing cooling system maintenance, the Mopar Radiator Cap (5278697AA) provides factory-accurate fitment, dependable pressure regulation, and reliable OEM cooling system performance for your vehicle.