Radiator Cap - Quinton Hazell - FC501

Name: Radiator Cap - Quinton Hazell - FC501
Brand: Quinton Hazell
SKU: mhp4btgpie
Availability: InStock

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Quinton Hazell Replacement Plastic Bolted Filler Expansion Tank Cap - FC501

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Product Information

Full details

This guide is for vehicle owners needing to replace their radiator cap. The Quinton Hazell FC501 offers a reliable 1-bar pressure cap made from durable plastic, ensuring your cooling system functions optimally. A potential caveat is the need to verify exact vehicle fitment using the make/model tool, as specific compatibility details are crucial.

All features

Model Part Number	FC501
Brand	Quinton Hazell

Extended Product Information

FAQs

How do I know if I need a new radiator cap?

Signs include coolant leaks around the cap, persistent engine overheating, or visible damage/wear on the old cap's seal. If your vehicle has a history of cooling system issues, replacing the cap as a preventative measure is advisable.

What does '1 bar pressure' mean for a radiator cap?

A 1 bar pressure rating indicates the cap is designed to maintain 1 bar (approximately 14.5 psi) of pressure within the cooling system. This raises the boiling point of the coolant, improving the system's efficiency and preventing overheating.

Can I use a 1.1 bar cap if my vehicle specifies a 1 bar cap?

It is generally recommended to use the pressure rating specified by the vehicle manufacturer. Using a higher-rated cap might increase system pressure beyond what components are designed to handle, potentially causing damage.

What vehicles is this Quinton Hazell FC501 cap compatible with?

This cap is listed as compatible with various MG, RENAULT, ALFA ROMEO/FIAT/LANCIA, and CITROËN/PEUGEOT models. Always use the provided make/model tool to confirm fitment for your specific vehicle.

How often should a radiator cap be replaced?

Radiator caps do not have a fixed replacement interval, but they should be inspected regularly (e.g., during oil changes). Replace the cap if it shows signs of wear, damage, or if cooling system issues persist.

What is the material of the Quinton Hazell FC501?

The Quinton Hazell FC501 radiator cap is made of durable plastic.

Troubleshooting

Coolant leaking from around the cap

Ensure the cap is correctly installed and fully locked. Inspect the sealing surface on the expansion tank for damage or debris. If the cap's rubber seal is worn or damaged, replace the cap.

Engine is overheating despite new cap

Verify the cap's pressure rating (1 bar) is correct for your vehicle. Check for other cooling system issues such as low coolant level, blocked radiator, faulty thermostat, or a failing water pump. The cap may be faulty if it does not hold pressure.

Cap does not seem to fit securely

Double-check vehicle compatibility using the make/model tool. Ensure you are not forcing the cap; it should fit onto the expansion tank's neck and twist to lock. Clean the neck of the expansion tank if there is any obstruction.

Pros and Cons

Pros

Ensures proper cooling system pressure maintenance.
Durable plastic construction for extended lifespan.
Compatible with a wide range of vehicle models through cross-references.
Designed as a direct replacement for specific OEM parts.

Cons

Requires verification of fitment using the make/model tool.
May not be suitable for all vehicle cooling systems, only those requiring a 1 bar plastic cap.
Limited color or material options (plastic only).

Setup, Compatibility & Care

Compatibility Verification:

Before purchasing, it is essential to use the provided make and model tool to confirm that the FC501 radiator cap is compatible with your specific vehicle. If unsure, contact the seller for assistance.

Installation:

Ensure the engine has completely cooled down before attempting to remove the old radiator cap. Never remove a hot radiator cap.
Carefully twist and remove the old cap.
Clean the sealing surface on the coolant expansion tank.
Gently press down and twist the new Quinton Hazell FC501 cap into place until it locks securely.

Care:

Radiator caps are generally maintenance-free. However, periodically inspect the cap and the sealing area for any signs of corrosion, damage, or wear. Ensure the cap seals correctly to maintain system pressure. If the cap appears damaged or the seal is compromised, it should be replaced immediately.