If you drive a modern Japanese or Korean car, there's a good chance this is the cap sitting on your radiator. The Tridon CC16110 is one of the most widely used caps in the range, found on everything from compact hatchbacks and small SUVs through to V6 sedans and large 4WDs. It's the everyday workhorse of the cooling system: small, simple and easy to forget about until it stops doing its job.
It's a metal recovery cap rated at 16 PSI (110 kPa) with an extra small Japanese bayonet connection. That's the compact push-and-twist fitting common on newer radiators with narrow filler necks. Under pressure, the double seal lets expanding coolant move into the overflow reservoir, and as the engine cools the vacuum valve draws it back. The result is a system that stays full, sealed and free of air, keeping temperatures steady in city driving, on the highway and everywhere in between.
Because this cap spends years exposed to heat cycles and coolant, the rubber seal eventually hardens and the spring weakens. A slow drop in the reservoir level, dried coolant around the filler neck or a sweet smell after driving can all point to a cap that's no longer holding pressure. Some vehicles offer more than one cap option depending on the radiator fitted, so it's worth comparing your old cap before ordering.
- Series - CC
- Pressure - 16 (PSI), 110 (kPa)
- System - Recovery
- Cap Style - Metal
- Connection Type - Extra Small Japanese Bayonet
