Radium Radiator Caps — Parts & Options

Parts are sold separately. Select the exact part number below. Each selection adds only that part to your cart; add other required components separately. Photos and application details may show a complete system or optional accessories.

Available part numbers

• 18-0076-A11 Radiator Cap Type-A 1.1Bar Black
• 18-0076-A13 Radiator Cap Type-A 1.3Bar Black
• 18-0076-A15 Radiator Cap Type-A 1.5Bar Black

The radiator cap is an essential part of an upgraded cooling system. Radium caps are engineered to safely improve cooling efficiency by managing the boiling temperature. A higher radiator pressure effectively raises the coolant boiling point, providing an extra safety margin and preventing air pocket cavitation at the water pump.

Each OEM replacement radiator cap is manufactured from stamped stainless steel for durability. All 18-0076-X1X radiator caps are electroplated black. Unlike OEM caps which use natural rubber gaskets, these radiator caps feature premium silicone sealing elements for long lasting durability.

PRESSURE

Available with 3 different pressure relief springs:

1.1Bar (16.0psi)
1.3Bar (18.9psi)
1.5Bar (21.8psi)

CAP TYPES

Radium radiator caps are designed for mini size (32mm ID) radiator necks only. Available in Type-A. We no longer offer Type-B.

Please confirm what style your application uses prior to ordering.

NOTE: All Radium Engineering coolant expansion tanks require a Type-A style radiator cap.