Parts for your 2013 Ford Transit-Radiator cap

2013 Ford Transit radiator-cap: what it is (and isn’t) on this model

For the 2013 Ford Transit, a traditional “radiator-cap” on the radiator itself isn’t used. Ford engineered these vans with a sealed radiator and a remote, pressurised expansion (degas) tank. The cap you deal with is on that tank, not on the radiator. This layout is confirmed across Ford’s technical literature, including the Ford Transit Owner’s Manual (2006–2013 models) cooling system guidance, the Ford Workshop Manual Section 303-03 (Cooling System – General Information) for the Transit platform, and third‑party repair texts like the Haynes Ford Transit Diesel (2006–2013). All specify filling and pressure control via the expansion tank, with no separate cap fitted to the radiator.

Why no radiator-cap? It’s about packaging, safety, and reliability. With the Transit’s front-end packaging (radiator tucked behind bodywork), a sealed radiator reduces potential leak points and keeps the service point up high and easy to reach. The pressurised expansion tank helps purge air, maintains stable pressure, and gives a consistent hot/cold level reference away from spinning fans and hot cores. It also means fewer times a tech needs to be right up against a hot radiator—handy in a busy workshop or roadside situation.

Owners and techs should treat the expansion tank cap as the “radiator-cap” equivalent. That cap holds system pressure and contains the valves that keep coolant from boiling under load. If the cap’s seal goes hard or the valve weakens, the Transit can lose coolant, push fluid into the overflow, or run hotter than it should.

• Check the expansion tank cap during routine servicing: look for perished rubber, cracked plastic, or crusty coolant residue on or around the cap.
• Only remove the cap when the engine’s cold, hot systems can release pressure and cause scalding.
• Use the correct pressure-rated cap specified for the exact engine/variant, the rating is printed on the cap and listed in the owner’s manual.
• If chasing unexplained coolant loss or intermittent overheating, a pressure test of the cap is a quick, low-cost diagnostic step.

So while this Transit doesn’t have a radiator-mounted cap, the expansion tank cap does the same critical job—keep it healthy, and the cooling system will return the favour on those long Aussie and Kiwi runs.

Popular questions about the 2013 Ford Transit radiator-cap

Does a 2013 Ford Transit have a radiator cap on the radiator?
Not on the radiator itself. It uses a pressurised expansion (degas) tank with a screw cap that controls system pressure and serves as the fill point.

Where do you top up coolant on a 2013 Transit, and how do you open the cap safely?
Top up at the expansion tank under the bonnet. Let the engine cool fully, place a rag over the cap, and crack it slowly to release any residual pressure. Fill to the correct mark with the specified coolant mix.

What pressure rating cap should a 2013 Transit use?
Use the exact rating shown on your current cap or as listed in the owner’s manual for your engine code. Different variants can differ—don’t guess, match the spec on the cap/vehicle documentation.