Parts for your 2010 Honda Civic-Sump plug washers

2010 Honda Civic sump plug washers: what they do and when to replace them

Yes, the 2010 Honda Civic uses a sump plug washer (also called an oil drain plug gasket), and it’s absolutely relevant to every oil change. Technical sources including the 2010 Honda Civic Owner’s Manual (Engine Oil/Filter section), the Honda Civic 2006–2011 Service Manual, and the Honda Genuine Parts Catalogue all specify fitting a new 14 mm crush washer to the sump plug at each refit. Honda’s service literature also calls out the correct torque for the drain bolt and the instruction to “always replace the drain plug washer.”

On this model, the sump plug washer is a small aluminium crush ring that sits between the sump plug head and the sump. When the plug is tightened, the washer deforms slightly to create a fluid-tight seal. That controlled “crush” is what keeps engine oil from seeping out, especially once the engine gets hot and everything expands and contracts. Honda’s common genuine part reference for the Civic is the 14 mm drain plug washer (often listed under Honda part number 94109-14000).

Because the washer is designed to crush once, it’s considered single-use. Reusing it can lead to oil misting or the classic drip on the driveway after a service. Best practice on a 2010 Civic is to replace the sump plug washer at every oil change—easy, cheap, and it saves headaches later.

When servicing a Civic, fit a fresh washer, clean the mating face on the sump, and tighten the plug to Honda’s spec of 39 N·m (around 29 lb·ft). Over-tightening can distort the washer too much or even damage the sump threads, so a torque wrench is the go. Most Civics of this year run a 17 mm sump plug head, and the washer inner diameter is 14 mm.

Handy tips for 2010 Honda Civic sump plug washers:

• Replace the washer any time the sump plug is removed—don’t double up washers or reuse old ones.
• Use a quality aluminium crush washer to match Honda’s spec.
• If you spot oil weeping after a service, check torque and confirm the washer wasn’t forgotten.
• Stick to regular service intervals (typically 10,000–15,000 km or 12 months, depending on use), and always include a new washer with the oil and filter.

These simple steps keep the Civic’s sump sealed tight, oil where it belongs, and servicing tidy and professional.

Popular questions about 2010 Honda Civic sump plug washers

What size sump plug washer does a 2010 Honda Civic use?

The 2010 Civic uses a 14 mm inner-diameter aluminium crush washer on the sump plug. This is the same size referenced in Honda’s parts catalogue for petrol variants of this generation. Using the correct 14 mm crush washer ensures the plug seats and seals properly.

How often should the sump plug washer be replaced on a 2010 Civic?

Honda service information says to replace it every time the drain bolt is removed—so at each oil change. That’s usually every 10,000–15,000 kilometres or 12 months in AU/NZ conditions, or sooner with heavy use. It’s a low-cost part that prevents leaks.

What is the torque spec for the 2010 Honda Civic sump plug?

Torque the sump plug to 39 N·m (about 29 lb·ft) with a new washer fitted. This spec is called out in Honda’s workshop manual. Avoid over-tightening, as it can flatten the washer excessively or damage threads in the aluminium sump.