Parts for your 2018 Honda Cr-v-Sump plug washers

2018 Honda CR‑V sump plug washers — what they do and when to replace them

Technical sources specific to the 2018 Honda CR‑V confirm it does use a sump plug washer (also called a crush washer). Honda’s CR‑V Service Manual for the 2017–2019 RW/RT series (Engine Lubrication section) instructs to “use a new drain plug washer” at each refit, and Honda Genuine Parts catalogues list “Washer, Drain Plug (14 mm)” — commonly referenced as 94109-14000 — for this model. Dealer workshop procedures and owner maintenance notes echo the same guidance, making the washer absolutely relevant on this vehicle.

On the 2018 CR‑V, the sump plug washer is a small aluminium ring that sits between the engine’s drain bolt and the sump. When the bolt is torqued, the soft metal crushes slightly to conform to the mating surfaces, creating a proper seal. That tiny bit of give is what prevents weeping and slow drips after an oil change — a simple part doing an important job.

Best practice is to replace the washer at every oil change. Honda’s workshop specs typically call for torquing the drain bolt to about 30 lbf·ft (40 N·m). Tightening to spec with a fresh washer ensures the seal forms correctly without over‑stressing the threads. Re‑using an old, already-crushed washer can lead to seepage, rounded bolt heads from over‑tightening, or even a distorted sump face.

During servicing, a tech will wipe the sump face clean, fit a new 14 mm aluminium washer, and tighten the bolt with a torque wrench. They’ll then refill with the correct oil grade and check for leaks after a short run. It’s a low-cost consumable that protects a much bigger investment — the engine and the driveway.

Signs a new washer is due (apart from routine replacement each service) include:

• Fresh oil mist or drips forming around the drain bolt after a change
• Needing to “nip up” the bolt to stop a slight weep
• A visibly flattened, gouged, or hardened old washer

Genuine or quality aftermarket washers are fine, but stick with the correct 14 mm aluminium crush type. Avoid stacking washers, using sealants, or wrapping the bolt in tape — none of that is necessary when the correct washer is installed and the bolt is tightened to spec. For Aussie and Kiwi owners servicing at home, keep a few spare washers on hand so every oil change is tidy, on‑spec, and leak‑free.

Popular questions

What size sump plug washer does a 2018 Honda CR‑V use?
It uses a 14 mm aluminium crush washer for the engine oil drain plug. In Honda parts language this is typically listed as “Washer, Drain Plug (14 mm)”, commonly referenced as 94109‑14000. Always match by VIN if ordering to be safe.

How often should the sump plug washer be replaced on a 2018 CR‑V?
Replace it at every oil change. That’s how the crush design is intended to work — one use, then discard. Re‑using can cause minor leaks, while a fresh washer tightened to about 30 lbf·ft (40 N·m) gives a proper seal.

Can a copper or reusable washer be used instead?
Honda specifies a single‑use aluminium crush washer. Copper can seal if correctly annealed and sized, but it changes torque behaviour and isn’t the factory spec. For consistent, leak‑free results, stick with the correct aluminium washer.