Cap Expansion Tank 1.2 Bar (BMW 3 Series E30)

R270.90

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Cap Expansion Tank 1.2 Bar (BMW 3 Series E30) is a fuel tank accessory designed to maintain correct pressure in the expansion tank of BMW 3 Series E30 vehicles

Cap Expansion Tank 1.2 Bar (BMW 3 Series E30) is a crucial component designed to regulate pressure within the coolant system of the BMW 3 Series E30. This cap maintains a controlled pressure of 1.2 bar, helping to prevent coolant loss and ensuring the cooling system operates efficiently under normal engine temperatures.

The expansion tank cap fits specifically to the coolant reservoir, playing an essential role in managing thermal expansion of the coolant fluid. When pressure builds inside the tank due to engine heat, this part allows the system to release or retain pressure as needed, protecting hoses and other cooling system components from damage or leaks.

When replacing this cap, confirm the pressure rating of 1.2 bar matches your existing part and ensure compatibility with the BMW 3 Series E30 coolant tank. Comparing the old cap’s specifications with this listing helps ensure proper function and system integrity.

  • Pressure rating: 1.2 bar
  • Vehicle group: BMW 3 Series E30
  • Category: Fuel Tank component

This cap is for buyers needing a pressure-regulating closure for their BMW E30’s expansion tank. If uncertain about fitment or specifications, contacting the sales desk or submitting a request for a part may provide additional guidance.

Not sure the code, size or specification matches? Use more Fuel Tank or Request a Part with a clear photo of the old part before checkout.

Frequently Asked Questions

Confirm fitment before ordering
Quick answers before you order. If anything is unclear, confirm fitment first using your VIN or part number and avoid mistakes.
Helpful product answers
What is the purpose of the Cap Expansion Tank 1.2 Bar for the BMW 3 Series E30?
This cap is designed to maintain the correct pressure within the expansion tank of your BMW 3 Series E30 cooling system. By regulating pressure at 1.2 bar, it helps prevent coolant loss and overheating, ensuring optimal engine performance and longevity.
Is the Cap Expansion Tank 1.2 Bar compatible with all BMW 3 Series E30 models?
The cap is specifically designed for the BMW 3 Series E30, but fitment can vary depending on the engine variant and production year. It is advisable to verify compatibility with your vehicle’s exact model and engine type before purchase to ensure proper fitment.
How can I check if my current expansion tank cap needs replacement?
Signs that your expansion tank cap may need replacing include coolant leaks around the cap, engine overheating, or a collapsed radiator hose. Regular inspection for cracks or worn seals on the cap can also help prevent cooling system failures.
Can I install the Cap Expansion Tank 1.2 Bar myself, or should I seek professional help?
While installation is straightforward, involving removal of the old cap and fitting the new one, it is recommended that Trade Partners or qualified technicians perform the replacement. This ensures the cooling system is properly sealed and pressure is correctly maintained.
What should I do if the Cap Expansion Tank 1.2 Bar does not maintain pressure after installation?
If the cap fails to maintain pressure, it could indicate a faulty cap or other cooling system issues such as a damaged expansion tank or radiator. Contact our Trade Partners for a thorough inspection or visit Request a Part for assistance in sourcing the correct replacement.