FH500 Radiator Water Tank Cap with Valve | part number 21360115

FH500 Radiator Water Tank Cap with Valve | part number 21360115

The FH500 Radiator Expansion Tank Cap with Integrated Pressure Relief Valve, part number 21360115, is a critical component of the cooling system in Volvo FH-series trucks.
This cap ensures a perfect seal for the coolant reservoir while the built-in pressure valve regulates internal system pressure, protecting the engine and cooling lines from overheating, over-pressure, and potential damage.

Manufactured from high-strength, heat-resistant engineered polymer, this cap is designed to meet OEM performance standards and deliver long-lasting durability under demanding road and temperature conditions.

Key Features & Technical Specifications FH500 Radiator Water Tank Cap with Valve | part number 21360115

• Part Number: 21360115

• Type: Radiator expansion tank cap with pressure relief valve

• Built-in pressure regulation valve for system protection

• High-temperature, corrosion-resistant polymer construction

• Heavy-duty sealing O-ring for perfect leak prevention

• Designed for high-pressure cooling systems

• Stable and reliable performance in long-haul operations

Function & Importance FH500 Radiator Water Tank Cap with Valve

This cap plays a vital role in maintaining cooling system efficiency:

• Prevents coolant leakage

• Maintains optimal internal pressure in the cooling system

• Helps prevent engine overheating

• Protects hoses, radiator, and reservoir from pressure damage

• Ensures effective coolant circulation

• Prevents dust, air, and contaminants from entering the coolant tank

Symptoms of a Faulty Cap FH500 Radiator Water Tank Cap with Valve

Replacing the cap may be necessary if you observe:

• Coolant leakage around the expansion tank

• Drop in coolant level despite no visible leaks

• Excessive engine temperature or overheating

• Damaged or deformed O-ring

• Pressure valve stuck or malfunctioning

• Cap not tightening or loosening properly

Compatible With

• Volvo FH500

• Also compatible with some models of Volvo FH460, FH520, FH4, FM (depending on system configuration)

Product Benefits

• Easy and fast installation

• OEM-spec design — fits perfectly without modification

• High resistance to heat, pressure, and coolant chemicals

• Protects the engine from costly overheating damage

• Long service life even in harsh climates and heavy-duty use