Parts for your 2002 Mitsubishi Lancer-Sump plug washers

2002 Mitsubishi Lancer sump plug washers — fitment, purpose and service tips

Technical sources confirm the 2002 Mitsubishi Lancer does use a sump plug washer. The Mitsubishi Lancer (CG/CH series, 2002) workshop manual in the lubrication section shows the engine oil drain plug fitted with a sealing gasket/washer. Mitsubishi’s ASA parts catalogue lists a 14 mm drain plug gasket (commonly referenced as MD050317) for Lancer engines of this era. General repair literature such as Haynes manuals notes replacing the drain plug crush washer at oil changes, and Australian aftermarket catalogues (e.g., Repco, Ryco, Supercheap Auto) list a compatible sump plug washer for the 2002 Lancer. That makes sump plug washers directly relevant for this model.

On the 2002 Lancer, the sump plug washer is a small but crucial seal that sits between the oil pan and the drain plug head. Its job is to prevent oil weeps once the plug is torqued down. Most are single‑use aluminium or copper “crush” washers. They deform slightly when tightened, taking up any tiny surface imperfections and creating a reliable seal without needing thread sealant.

Because it’s a crush design, the washer is intended to be replaced at each oil change. Reusing a flattened washer can leave a faint film of oil on the sump over time or a drip on the driveway. It can also tempt overtightening to stop a seep, which risks stripping threads in the alloy pan. That’s why workshop literature for the CG/CH Lancer calls for a fresh gasket and a set torque — commonly around 39 N·m for the drain plug, depending on engine variant. Owners should confirm the exact figure for their engine code, then use a torque wrench.

Choosing the right washer matters. The Lancer’s drain plug typically uses a 14 mm internal diameter washer (M14), with an OD and thickness matched to Mitsubishi’s spec. Aluminium suits most daily use, copper offers a bit more resilience and can be annealed in a pinch, though new is always best. Fibre types exist but are less common on these cars.

• Best practice at service time:
  • Replace the washer at every oil change.
  • Clean the mating face on the sump and the plug head.
  • Start the plug by hand, then torque to spec (about 39 N·m).
  • After the first heat cycle, glance for any misting around the plug.
• Signs the washer needs attention: fresh oil mist near the drain plug, a slow drip after parking, or a plug that needed “a bit extra” to feel tight last time.

Look after the washer and the Lancer’s sump stays bone dry, the pan threads stay healthy, and servicing stays hassle‑free.

What size sump plug washer does a 2002 Mitsubishi Lancer use?

Most 2002 Lancers use an M14 crush washer (about 14 mm internal diameter), matching Mitsubishi’s commonly cited gasket part used across CG/CH models. Outer diameter and thickness vary slightly by brand, but a standard M14 aluminium or copper washer specced for Mitsubishi applications is the safe pick.

Can the old sump plug washer be reused on a 2002 Lancer?

It’s not recommended. The factory‑style washer is a crush type that deforms once to make the seal. Reusing it can lead to weeps or a drip and encourages overtightening, which can damage the sump threads. A new washer each oil change is cheap insurance.

What torque should the sump plug be tightened to on a 2002 Lancer?

Mitsubishi workshop literature for CG/CH Lancer engines commonly quotes around 39 N·m for the drain plug. Variations can exist by engine code, so it’s smart to confirm per the specific service manual and use a torque wrench to keep the alloy sump happy.