Parts for your 2014 Honda Stream-Sump plug washers

2014 Honda Stream sump plug washer: does it use one, and what to know

Based on Honda technical literature, the 2014 Honda Stream does use a sump plug washer (also called an oil drain plug crush washer). The Honda Stream RN6–RN9 service manual (Lubrication System – Engine Oil Replacement) states to “always use a new drain plug washer,” and the 2014 Stream owner’s manual reinforces replacing the drain bolt washer at each oil change. Honda’s genuine parts catalogue lists a 14 mm aluminium crush washer for the Stream’s R18A/R20A engines. Together, these sources confirm a washer is fitted and is a routine service item.

This little aluminium crush washer might look like a throwaway bit, but on a 2014 Honda Stream it’s doing the hard yakka sealing the sump so oil stays put. When the drain bolt is torqued up, the soft washer deforms to fill tiny imperfections between the bolt and sump face, creating a reliable, leak-free seal. Because it crushes to make that seal, it’s a single-use item—fit a fresh one every time the oil’s changed.

Owners keen to keep their Stream running sweet should replace the washer at each service interval (typically every 10,000–15,000 kilometres or 12 months in Australia and New Zealand, or as per the maintenance minder). Pop a new 14 mm aluminium crush washer on the drain bolt, snug it up to the specified torque—Honda commonly calls for about 29 N·m—and avoid over-tightening. Going too hard can distort the washer or even damage the sump threads.

There are a few tell-tales that a washer’s past it: weeping oil around the drain bolt, a faint drip after a hot run, or a bolt that never seems to feel “right” when tightening. Swapping in a fresh OEM-style washer sorts those dramas quickly. Copper or reusable washers exist, but Honda’s documentation specifies a new aluminium crush washer each time, and that’s the safe bet for these engines.

Handy tips for the DIY crowd:

• Clean the bolt and sump sealing face before refitting.
• Inspect the drain bolt, replace it if the head is rounded or the threads look tired.
• Skip sealants or tape—unnecessary with a proper crush washer.
• After the change, warm the engine and check for any seepage.

It’s a cheap part that protects an expensive engine—well worth doing right on every service.

Popular questions

What size sump plug washer does a 2014 Honda Stream use?
It uses a 14 mm aluminium crush washer on the engine oil drain plug. That’s the standard Honda washer size for the R18A and R20A engines fitted to the Stream. Always fit a new one at each oil change.

How often should the sump plug washer be replaced?
Every oil change. Because it’s a crush-style washer, it’s designed for single use. Reusing it risks weeps or drips that make a mess and can lead to low oil levels over time.

What torque should the drain bolt be tightened to?
Honda commonly specifies about 29 N·m for the oil drain bolt on engines like the R18A/R20A. If in doubt, check the Stream’s service data. Tighten to spec—don’t overdo it—as excess torque can damage threads or deform the new washer.