PCD500030 Coolant Overflow Reservoir Tank Cap

Pressure-Regulating Cap for Land Rover Expansion Tanks

Keep your Land Rover’s cooling system operating safely with the PCD500030 Coolant Overflow Reservoir Tank Cap. This precision-engineered cap regulates system pressure, prevents leaks, and ensures coolant stays where it belongs — protecting your engine from overheating.

Designed as a direct replacement for worn or leaking caps, the PCD500030 fits perfectly on compatible Land Rover expansion tanks, including LR020367 and similar applications.

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Key Features:

• Direct-fit replacement for PCD500030

• Maintains correct system pressure for optimal cooling performance

• High-strength heat- and chemical-resistant construction

• Prevents coolant loss and overheating

• Quick, tool-free installation

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Vehicle Compatibility: 

• LR3 / Discovery 3 (2005–2009)

• LR4 / Discovery 4 (2010–2016)

• Range Rover Sport L320 (2006–2013)
  

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Part Number: PCD500030

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Installation Notes:

• Simply remove the old cap and screw on the new one — no tools required

• Replace whenever the cap seal is cracked, damaged, or not holding pressure

• Recommended to inspect cap during every coolant service

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Frequently Asked Questions:

Q: Does this fit Genuine and OEM expansion tanks?
A: Yes — it’s compatible with all versions of the LR020367 expansion tank.

Q: How often should I replace the cap?
A: Every 3–5 years or if it fails a pressure test.

Q: Will this fix a coolant leak?
A: Only if the leak is caused by a faulty or cracked cap seal — check your reservoir for damage as well.