Radium Engineering Radiator Caps

Radiator Caps

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.

NOTE: Traditionally, "radiator" caps are mounted to the radiator but can also be found on coolant expansion tanks (below).

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. 1.1Bar (16.0psi)
2. 1.3Bar (18.9psi)
3. 1.5Bar (21.8psi)

TYPES
Radium radiator caps are designed for mini size (32mm ID) radiator necks only. Available in 2 common styles (Type-A and Type-B).

Please confirm what style your application uses prior to ordering. NOTE: As shown below, Radium Engineering coolant expansion tanks require a Type-A style radiator cap.

COMPATIBILITY

Below are popular vehicles with their respective radiator cap style used from the factory.

NOTE: there are many vehicles not listed below.

Type-A
1990-1993 Acura Integra
1991-2005 Acura NSX

1990-1993 Honda Accord
1988-1991 & 2016-up Honda Civic
1988-1991 Honda CRX
1992-2001 Honda Prelude

2003-2008 Infiniti G35
2008-up Infiniti G37
2014-up Infiniti Q50
2014-up Infiniti Q60

1992-2000 Lexus SC400

1990-1995 Mazda Cosmo
1990-2005 Mazda Miata
2006-up Mazda MX-5
1986-2002 Mazda RX-7
2004-2011 Mazda RX-8

1991-1999 Mitsubishi 3000GT
1990-1999 Mitsubishi Eclipse
2002-up Mitsubishi Lancer/EVO

1989-1998 Nissan 180SX
1989-1998 Nissan 200SX
1989-1998 Nissan 240SX
1990-1996 Nissan 300ZX
2003-2009 Nissan 350Z
2009-up Nissan 370Z
1988-1994 Nissan Cefiro
2005-up Nissan Frontier
2009-up Nissan GT-R
1989-2002 Nissan Laurel
1989-2002 Nissan Silvia
1989-2002 Nissan Skyline

2005-2006 Saab 9-2X

1997-up Subaru Forester
1993-up Subaru Impreza
1990-up Subaru Legacy
2015-up Subaru WRX STi
2015-up Subaru WRX

1982-1995 Toyota Celica
1985-1995 Toyota MR2
1986-1992 Toyota Supra

Radium Coolant Expansion Tank

Type-B
1994-2001 Acura Integra
2002-2006 Acura RSX
2004-2008 Acura TSX

1998-2016 Chevrolet Tracker
1989-1997 Geo Tracker

1994-1997 Honda Accord
1992-2015 Honda Civic
1993-1997 Honda Del Sol
2003-2011 Honda Element
2007-up Honda Fit
2000-2009 Honda S2000

2008-up Lexus LX570
1998-2005 Lexus IS300

2012-up Scion FR-S

2012-up Subaru BRZ

1989-1999 Suzuki Swift

1996-up Toyota 4Runner
2012-up Toyota 86
2008-up Toyota Land Cruiser
2008-up Toyota Sequoia
1993-2002 Toyota Supra
1995-up Toyota Tacoma
2007-up Toyota Tundra

SPECIFICATIONS

Other Radium Engineering Products available for any chassis/engine - if you don't see what you’re looking for please message us directly.
We shop our competition - if you find a lower comparable price we will match or beat it - message for details!
PROPOSITION 65 WARNING: These products may contain chemicals known to the State of California to cause birth defects or other reproductive harm. For more information visit www.P65Warning.ca.gov

About

RADIUM Engineering, LLC

Since 2010, Radium Engineering's goal has been to simply design and produce high quality aftermarket automotive performance products. Radium Engineering relies on a core team with a passion for innovation to lead the company toward advancement in the industry.

All Radium products are carefully planned with thorough R&D and designed in-house using the latest computer simulation and modeling techniques. Extensive testing and evaluation ensures the performance of Radium products exceed consumer expectations. For these reasons, top motorsports competitors and enthusiasts worldwide rely on Radium Engineering products.

Currently, Radium offers an expanding collection of motorsport parts and accessories for high performance and racing, focusing on their revolutionary fuel surge tank line and PCV oil catch can systems. A growing collection of application specific parts are also being created. Please contact Radium Engineering for more information.