Parts for your 2014 Honda Odyssey-Sump plug washers

2014 Honda Odyssey sump plug washers — what they do and when to replace them

Per Honda’s technical literature — the 2014 Odyssey Owner’s Manual, the J35 V6 service manual, and the Honda Genuine Parts catalogue — the engine oil drain (sump) plug is designed to use a 14 mm aluminium crush washer that should be replaced at every oil change. The commonly listed Honda washer is the 14 mm drain plug gasket (P/N 94109-14000 or superseding equivalent), with the drain bolt torqued to about 39 N·m (29 lbf·ft). So yes, this Odyssey absolutely uses a sump plug washer, and Honda expects it to be a single‑use item.

On a 2014 Honda Odyssey, the sump plug washer does the quiet but crucial job of sealing engine oil inside the alloy sump. It sits between the drain bolt head and the sump face, and when the bolt is tightened to spec, the soft aluminium washer “crushes” to conform to the surfaces. That crush action creates a reliable seal, helps maintain the correct clamping load, and protects the sump’s mating face from galling. Reusing a flattened washer can lead to weeping, drips on the driveway, or worse, the temptation to over‑tighten the bolt to chase a seal — not ideal for the sump threads.

For routine servicing, replacing the washer is cheap insurance. A fresh, genuine‑spec aluminium washer is designed to deform once and seal properly. When changing oil on the Odyssey, wipe the sump face clean, fit a new 14 mm crush washer to the drain bolt, thread it in by hand to avoid cross‑threading, then torque to around 39 N·m. Avoid sealing goop or PTFE tape — the washer does the sealing, not the threads.

How do owners know a washer is due? Three quick tells:

• There’s a faint oil halo around the drain bolt after a service.
• The old washer looks visibly flattened or grooved.
• The bolt needed more oomph than usual to stop a weep (a sign it was reused).

Keeping a small stash of genuine‑spec washers makes servicing easy. They’re inexpensive, save time, and keep the Odyssey tidy and leak‑free. While some aftermarket copper or “reusable” washers exist, sticking with Honda’s aluminium crush type keeps the torque spec, feel, and sealing performance consistent — exactly what’s wanted on an alloy sump in Aussie and Kiwi conditions.

FAQs

Does a 2014 Honda Odyssey need a new sump plug washer at every oil change?
Yes. Honda’s service guidance treats the aluminium crush washer as single‑use. Swapping it each oil change helps achieve the correct torque and a reliable seal, reducing the chance of slow weeps or overtightening the drain bolt.

What size washer does the 2014 Odyssey use?
It uses a 14 mm aluminium crush washer, typically listed by Honda as P/N 94109-14000 (or a superseding equivalent). The drain bolt is usually torqued to about 39 N·m (29 lbf·ft) on the J35 V6 engine.

Can a copper or reusable washer be used instead?
Copper can seal, but it crushes differently and may change the feel/torque required. Reusable types vary in performance. For consistent sealing and to match Honda’s torque guidance on the alloy sump, the genuine‑spec aluminium crush washer is the safe bet.