Parts for your 2020 Ford Ranger-Sump plug washers

2020 Ford Ranger sump plug washers — what they do and when to replace them

Short answer: yes, the 2020 Ford Ranger is fitted with a sump plug sealing washer, and it’s relevant to every oil change. Technical guidance in the Ford Workshop Manual for the PX III Ranger (2020MY) instructs technicians to discard the drain plug seal and install a new one during refit, and the Ford Global Parts Catalogue lists a dedicated “seal/washer – oil drain plug” against the 2.0L Bi‑Turbo, 3.2L and 2.2L diesel engines. Motorcraft service parts listings also include replacement drain plug gaskets for Ranger applications. That’s the factory way of saying the washer is a service item, not a re‑use‑forever piece.

The sump plug washer’s job is simple but critical: it seals the drain plug to the alloy or steel sump so engine oil doesn’t seep out under heat and vibration. On many Rangers it’s a crush‑type copper or aluminium ring that deforms once to make a gas‑tight seal. Some variants use a drain plug with a bonded rubber/metal washer. Either way, it’s designed as a one‑shot seal. Re‑using a flattened crush washer or a nicked bonded washer is a common cause of those annoying drips that show up on the driveway a day or two after a service.

Best practice on a 2020 Ranger is to replace the washer at every oil change. If it’s a separate copper/aluminium ring, match the correct size (commonly M14 on Ranger sumps) and bin the old one. If the vehicle has a plug with an integrated/bonded seal, replace the whole plug assembly as specified. The Workshop Manual also calls for tightening the drain plug to the correct spec for the engine family—typically in the 28–35 N·m window—so it seals without distorting the pan threads. Over‑tightening a crush washer won’t make it seal better, it just crushes it unevenly.

A quick service routine that keeps things tidy:

• Clean the sump face and threads, and check for burrs or nicks.
• Fit a new washer to a clean plug, start the plug by hand, then torque to spec.
• Warm the engine, wipe the area, and re‑check for weeps after a short run.

Genuine or quality aftermarket washers both do the job if they’re the right spec. For fleets and DIYers in Aus/NZ, keeping a small pack of M14 crush washers on the shelf saves delays at service time and helps the Ranger stay bone‑dry between intervals.

Popular questions

What size sump plug washer does a 2020 Ford Ranger use?
Most 2020 Ranger variants use an M14 sealing washer. Some engines use a separate copper/aluminium crush washer, while others have a plug with a captive bonded seal. The safest bet is to confirm by VIN or check the old plug: if the seal comes off, it’s a crush washer, if it’s bonded, replace the plug assembly.

How often should the sump plug washer be replaced?
Every oil change. Ford’s workshop guidance treats the seal as single‑use. Re‑using an old washer is a common source of slow leaks, especially once the engine gets hot on highway trips.

What torque should the drain plug be tightened to?
Refer to the Ford Workshop Manual for the specific engine, most 2020 Ranger engines sit roughly in the 28–35 N·m range. Use a torque wrench—over‑tightening can damage threads or distort the sealing surface, and under‑tightening can allow a weep.