Parts for your 2013 Ford Transit-Oil cap

2013 Ford Transit oil cap — what it does and how to look after it

Yes, the 2013 Ford Transit uses an engine oil filler cap. This is confirmed by Ford technical literature: the 2013 Transit/Transit Custom Owner’s Manual shows the oil filler cap in the engine bay diagram, the Ford Workshop Manual (Section 303-00, Engine System—General Information) references removing and refitting the cap during oil service, and Ford’s parts catalogues list an “Engine Oil Filler Cap” for 2013 Transit variants by VIN. So it’s a relevant, fitted component on Aussie and Kiwi-market vans.

On a 2013 Ford Transit, the oil cap sits on top of the rocker cover under the bonnet. It seals the engine’s oil filler neck, keeping dust and moisture out, and preventing oil vapour or liquid from splashing out while the engine’s running. It’s a small bit of plastic and rubber, but it helps maintain correct crankcase conditions and keeps the oil cleaner for longer, which matters for diesel engines that work hard and clock big kilometres.

As part of regular servicing, the oil cap deserves a quick once-over. A tired cap or perished seal can lead to weeping oil, messy engine bays, false oil smells, and in some cases a rough idle from unwanted air leaks. It’s an easy item to inspect and, if needed, replace.

• At each oil change, wipe the cap and filler neck, and check the cap’s O-ring or seal for flattening, cracks, or hardening.
• Make sure the threads or bayonet lugs engage smoothly. If it doesn’t seat squarely or backs off, swap it.
• Look for residue (“mayonnaise”) under the cap, a light film can be normal from short trips, but heavy build-up may warrant a longer run or a technician’s check.
• Fit a genuine or high-quality equivalent cap matched to the engine code (e.g., Duratorq TDCi variants) to ensure proper sealing.

Replacing the cap is straightforward: let the engine cool, remove the old cap, wipe the filler rim, inspect the seal, then install the new cap hand-tight until it’s snug—no need to reef on it. After the next drive, have a quick look for any fresh oil mist around the cap. Never drive without an oil cap, it can spray oil, invite contaminants, and risk engine damage.

Simple, tidy, and inexpensive—the humble oil cap protects pricey engine oil and helps keep the Transit running sweet between services.

Popular questions about 2013 Ford Transit oil caps

Where is the oil cap on a 2013 Ford Transit?
It’s on top of the engine, usually on the rocker cover, marked with an oil can symbol. Pop the bonnet, and you’ll spot it near the centre or slightly offset, depending on the engine variant. If in doubt, the Owner’s Manual engine bay diagram points it out clearly.

Can a worn oil cap cause leaks or smells?
Yes. A flattened or cracked seal can let vapour and a light film of oil escape, leading to oily residue around the filler neck and a hot-oil whiff in the cabin at idle. Replacing the cap or its seal usually sorts it quickly and cheaply.

Do I need a specific cap for my engine code?
Best practice is to match the cap to the exact engine variant and build year. A genuine or high-quality aftermarket cap listed for the 2013 Transit’s engine ensures the correct fit and seal, which helps avoid nuisance leaks or cap loosening.