Parts for your 2013 Honda Stream-Sump plug washers

2013 Honda Stream sump plug washers — what they do and when to replace them

Yes, the 2013 Honda Stream uses a sump plug washer. Technical sources such as the Honda Stream RN6–RN9 Service Manual (Engine Lubrication section) and Honda’s Electronic Parts Catalogue list an aluminium crush washer under the engine oil drain (sump) bolt. The catalogue specifies a 14 mm washer (commonly referenced as “Washer, Drain Plug (14 mm)”, Honda part number 94109-14000), and the service procedure calls for fitting a new washer whenever the plug is removed, then tightening the plug to about 39 N·m (29 lbf·ft). That makes the sump plug washer a standard, replaceable service item on the 2013 Honda Stream.

On this model, the sump plug washer’s job is simple but crucial: it deforms slightly as the drain bolt is torqued up, creating a reliable, oil-tight seal between the bolt and the sump. Because it’s designed to crush once, reusing it can lead to weeping oil, annoying drips on the driveway, or the temptation to overtighten the bolt to stop a leak—none of which is great for the sump threads. An inexpensive new washer at each service helps keep the engine clean, the oil where it should be, and the bolt torque within spec.

As part of regular servicing, owners should plan to replace the washer at every engine oil change (typically around 10,000 km or 12 months in AU/NZ conditions, or as per the vehicle’s maintenance schedule). A few practical tips help:

• Use a new 14 mm aluminium crush washer of OEM quality.
• Clean the mating surfaces on the sump and bolt head before refitting.
• Tighten the drain bolt with a torque wrench to approximately 39 N·m, don’t rely on “feel”.
• After the first short drive, have a quick look for any fresh oil around the plug.

Signs the washer needs attention include fresh oil mist or drips at the plug, a washer that’s visibly grooved or flattened, or a plug that won’t hold torque without turning further. Copper washers can seal, but Honda specifies aluminium for this engine, for best results, stick with the OEM style and size. Technical references: Honda Stream (RN6–RN9) Service Manual, Engine Lubrication procedures, Honda EPC listing “Washer, Drain Plug (14 mm) 94109-14000”, Honda service literature advising replacement of the drain plug washer at each oil change.

What size sump plug washer does a 2013 Honda Stream use?

It uses a 14 mm aluminium crush washer. In Honda parts language this is typically listed as “Washer, Drain Plug (14 mm)”, widely referenced under part number 94109-14000. The 14 mm refers to the inner diameter that fits the drain bolt for the R-series engines used in the Stream.

How often should the sump plug washer be replaced?

Replace it at every engine oil change, or any time the drain bolt is removed. The washer is a single-use sealing ring, reusing it risks weeping oil or needing extra torque on the bolt, which isn’t ideal for the sump threads.

What’s the correct torque for the sump drain plug on a 2013 Honda Stream?

About 39 N·m (29 lbf·ft) with a new, correct 14 mm aluminium crush washer. Always fit the new washer, clean the mating surfaces, and use a torque wrench to avoid overtightening.