Plenty of plastic screw-on caps share the same thread size and pressure rating, yet still aren't interchangeable. Differences in seal depth, valve length or the shape of the cap body can mean a cap that looks right on paper doesn't seal properly in the tank. The Tridon CE18125 is engineered around specific applications, so it's worth matching this exact part number rather than grabbing any 18 PSI, M52 cap off the shelf.
It's a plastic recovery cap rated at 18 PSI (125 kPa), made to screw onto an M52 neck, usually on the coolant expansion tank. The double seal keeps the system sealed under pressure while working with the tank to manage expansion and contraction: coolant moves out as temperatures rise and returns as they fall, so the level stays consistent and the system doesn't draw in air.
For diesel utes and SUVs that spend their lives towing, loaded up or working in the heat, a healthy cap is an easy part of keeping the cooling system reliable. If you're noticing crusty coolant residue around the cap, a hissing sound after shutdown, or a tank that won't hold its level, replacing the cap is a quick, low-cost first step before chasing bigger problems.
- Series - CE
- Pressure - 18 (PSI), 125 (kPa)
- System - Recovery
- Cap Style - Plastic
- Connection Type - Plastic Screw (Suits M52)
