Heavy-Duty Radiator Cap Deep Neck 3/4", Pressure 15 lbs, O.D. Size "B" 2-11/16"

Keep your truck's cooling system operating efficiently with high-quality Heavy-Duty Radiator Caps from HD Truck Source. Designed to maintain proper cooling system pressure, radiator caps play an essential role in regulating coolant pressure, helping prevent overheating, and protecting critical engine cooling components.

A properly functioning radiator cap helps maintain the correct pressure within the cooling system, raising the coolant's boiling point and allowing the engine to operate efficiently under demanding conditions. When pressure exceeds the cap's rated limit, the pressure relief valve allows excess pressure to escape, helping protect the radiator and other cooling system components.

Our replacement radiator caps are designed for compatible heavy-duty trucks, semi-trucks, commercial vehicles, buses, and fleet applications. Whether you're replacing a worn radiator cap or performing preventive cooling system maintenance, choosing the correct pressure-rated cap is essential for dependable engine performance.

Key Features & Benefits

• Maintains Proper Cooling System Pressure: Helps regulate pressure for efficient engine cooling and reliable operation.
• Helps Prevent Engine Overheating: Maintains the designed system pressure to help reduce coolant boiling and overheating risks.
• Pressure Relief Protection: Releases excessive cooling system pressure according to the cap's rated specifications.
• Reliable Sealing Performance: Helps prevent coolant loss caused by a worn or improperly sealing radiator cap.
• Heavy-Duty Applications: Suitable for compatible semi-trucks, commercial trucks, buses, and fleet vehicles.
• Cooling System Maintenance: An essential replacement component for maintaining proper cooling system operation.
• Multiple Pressure Ratings: Available configurations may accommodate different cooling system pressure requirements.

Why a Quality Radiator Cap Matters

Your truck's radiator cap is a small but critical component of the engine cooling system. A damaged, worn, or incorrectly rated radiator cap can cause coolant loss, improper system pressure, overheating, and reduced cooling efficiency.

Heavy-duty diesel engines generate substantial heat, especially when hauling heavy loads, climbing steep grades, or operating for extended periods. A properly functioning radiator cap helps the cooling system maintain its specified operating pressure, supporting efficient heat management and protecting vital engine components.

Replacing a faulty radiator cap is an inexpensive preventive maintenance step that can help avoid more costly cooling system problems.

Heavy-Duty Radiator Caps for Commercial Truck Applications

HD Truck Source offers radiator cap replacement options for a wide range of heavy-duty commercial vehicle cooling systems. Depending on the specific part number and application, radiator caps may be suitable for trucks manufactured by Freightliner, Peterbilt, Kenworth, International, Mack, Volvo, Western Star, and other commercial vehicle manufacturers.

Always verify the required pressure rating, cap dimensions, sealing configuration, and OEM part number before ordering to ensure proper fitment.

Shop Heavy-Duty Radiator Caps at HD Truck Source for dependable replacement cooling system components designed to help keep your truck running efficiently.