Cooling Accessories

This page is part of the Cooling range. Related categories:

• Radiators
• Radiator Hoses
• Expansion Tanks
• Thermo Fans
• Cooling Panels

To browse by manufacturer, see all brands.

• Radiator caps: Check the pressure rating, for example 1.3 bar. Also check the cap style and size, such as Type A or 32mm ID, and make sure they match your radiator or filler neck. Options include universal caps from Radium Engineering and KOYORAD, a GrimmSpeed cap for Subaru, and a GrimmSpeed titanium cap for the Subaru WRX (VAG/VBH) and STI (VAB).
• Low temp thermostats: Each product title states the opening temperature, such as 68°C or 76°C. Thermostats are specific to the engine and chassis. For example, the Mishimoto Lancer Evolution VII/VIII/IX (CT9A) and Evolution X (CZ4A) thermostats are separate parts. Spoon Sports thermostats are listed for the Civic Type R (FK8/FL5), Integra Type R (DC5) and Civic (EG6).
• Filler necks and hose adapters: These are made for specific chassis. The KOYORAD aluminium filler neck suits the Subaru BRZ (ZC6) and Toyota 86 (ZN6). The PERRIN coolant hose adapter is listed for the Subaru WRX/STI (VAG/VAB), BRZ (ZC6/ZD8) and Toyota 86/GR86 (ZN6/ZN8).
• Guards and deflectors: Mishimoto auxiliary radiator rock guards suit the BMW M3 (G80) and M4 (G82/G83). The HARDRACE rear differential cooling deflector suits the Toyota GR Yaris and Yaris (GXPA16/MXPA12).
• Model year: Some parts only cover certain years. For example, one Mishimoto thermostat covers the Toyota 86 (ZN6) from MY17–20 only. Confirm your chassis code and build year before ordering.

Installation by a professional is recommended. Replacing a thermostat, filler neck or hose adapter usually means draining the coolant, refilling it and bleeding air from the system afterwards. Have a coolant suited to your vehicle ready, and only work on the cooling system when the engine is cold. Never remove a radiator cap while the engine is hot. Universal parts such as caps and clamps should be checked against your existing hardware for size before fitting.

What does the 1.3 bar rating on a radiator cap mean?
It is the pressure the cap is rated to hold in the cooling system before it releases. Choose a cap that suits your vehicle's cooling system.

What do the 68°C and 76°C figures on thermostats mean?
They are the temperatures at which each thermostat is listed to open, as shown in the product title.

Will a universal radiator cap fit my car?
Check the cap type and size listed, such as Type A or 32mm ID, against your radiator or filler neck before ordering.

Can I install these parts myself?
Installation by a professional is recommended, as most cooling system work involves draining, refilling and bleeding the coolant.