Parts for your 2005 Honda Stream-Sump plug washers

2005 Honda Stream sump plug washers

Yes, a sump plug washer is absolutely used on the 2005 Honda Stream. Honda workshop literature for the RN1–RN5 series (2001–2006) specifies an aluminium crush washer on the engine oil drain (sump) plug and recommends replacing it at every oil change. Honda’s own parts catalogues list a 14 mm drain plug gasket for the D17A and K20A engines found in 2005 models (typical OEM references include 94109-14000 and 90471-PX4-000). Those technical sources make it clear the washer is a service item, not optional.

On this Stream, the sump plug washer’s job is simple but critical: it deforms slightly when torqued, creating a reliable seal between the sump and the plug so engine oil doesn’t weep out. Reusing an old, crushed washer can lead to annoying drips on the driveway, or worse, a slow loss of oil that the driver might not notice straight away. Fresh oil is only as good as the seal that keeps it in.

For routine servicing, the advice is straight down the line: fit a new 14 mm aluminium crush washer at every oil change. Honda service information backs this up, and it’s cheap insurance against leaks. Torque the drain plug to around 39 N·m (29 lbf·ft) rather than “tight as you can”, that value is commonly specified in Honda service manuals for this size plug and washer. Over-tightening can distort threads or the sump face, while under-tightening can allow seeping. The standard flat aluminium washer isn’t directional, so there’s no special orientation to worry about.

• Replace the washer at each oil change (time or distance-based, whichever comes first).
• Clean the sump face and plug seat, install the new washer, start the plug by hand to avoid cross-threading.
• Tighten to the correct torque, avoid sealants or tape—Honda intends the crush washer to do the sealing.
• After refilling, run the engine, then check under the plug for any sign of a film of oil. Recheck after the next short drive.

Signs the old washer is past it include a faint oil “sweat” around the plug, a drip spot forming overnight, or needing to over-tighten the plug to get it to seal. Keeping a small stash of genuine-style washers on the shelf makes every Stream service tidy, quick, and leak-free.

Popular questions about 2005 Honda Stream sump plug washers

What size washer does the 2005 Honda Stream use?

It uses a 14 mm aluminium crush washer sized for the Honda drain plug. Honda parts catalogues commonly list it under references like 94109-14000 or 90471-PX4-000. That’s the OEM style that compresses properly at the specified torque.

How often should the washer be replaced?

Every oil change. Honda service guidance treats the washer as a single-use sealing gasket. Swapping it each time helps prevent weeping and means the correct torque will produce a reliable seal without over-tightening.

Can a copper washer be used instead of aluminium?

Copper can work if it’s the correct 14 mm size and properly annealed, but Honda specifies aluminium for consistent crush and sealing at the factory torque. For hassle-free servicing, most techs stick with the OEM-style aluminium washer.