Parts for your 2008 Mitsubishi Lancer-Sump plug washers

2008 Mitsubishi Lancer sump plug washers

Technical sources indicate the 2008 Mitsubishi Lancer does use a sump plug washer (also called a drain plug gasket/crush washer). The Mitsubishi Motors 2008 Lancer (CJ) workshop manual for the 4B11/4B12 engines specifies replacing the drain plug gasket at each oil change, and the Mitsubishi ASA/CAPS parts catalogue lists a dedicated oil drain plug gasket for these engines (commonly supplied as a 14 mm aluminium crush washer, e.g., Mitsubishi part number MD050317). The same service literature specifies tightening the drain plug with a new washer to the correct torque (around 39 N·m), confirming the washer is a required service item.

For the 2008 Lancer, the sump plug washer’s job is simple but crucial. It’s a soft, single‑use seal that crushes slightly when the drain plug is tightened, creating a reliable seal between the plug and the sump. Without it, or if it’s reused, the plug can weep oil, work loose over time, or tempt over‑tightening to stop a leak—none of which is good for the engine or the alloy sump.

As part of routine servicing, this Lancer should get a fresh washer every oil change. The washer is cheap insurance: fit a new aluminium (or copper) crush washer that suits the 14 mm drain plug used on the 4B11/4B12 engines. After dropping the oil, make sure the old washer isn’t stuck to the sump face, clean the mating surfaces, then install the plug with the new washer and torque it to spec (about 39 N·m). No rattle‑gun, no guesswork—just a torque wrench and a smooth, even nip‑up under the bonnet.

Signs the washer needs attention include a light oil mist around the plug, drips on the driveway after a service, or a plug that feels “bottomed out” without reaching torque. If any of these show up, it’s time to pull the plug, replace the washer, and refill with fresh oil. Owners who stick to 10,000–15,000 km service intervals will find replacing the washer each time keeps the Lancer tidy, leak‑free, and within manufacturer intent.

Handy tips:

• Always use a new crush washer—these are designed for one‑time use.
• Confirm size against the old washer or by VIN if unsure, Mitsubishi’s MD050317 is commonly specified.
• Torque the plug correctly, over‑tightening risks stripping threads in the sump.

FAQs

What size sump plug washer does a 2008 Mitsubishi Lancer use?
Most 2008 Lancer 4B11/4B12 engines use a 14 mm aluminium crush washer (commonly referenced as Mitsubishi MD050317). It’s best to match by VIN or compare to the original, as some aftermarket plugs vary slightly in thickness.

How tight should the sump plug be on a 2008 Lancer?
Tighten the drain plug with a new washer to about 39 N·m. Using a torque wrench helps avoid leaks from under‑tightening and damage from over‑tightening—especially important with alloy sumps.

Can the sump plug washer be reused?
It’s not recommended. The washer is a crush‑type, designed for one use. Reusing it risks seepage, drips, or needing extra torque that can stress the threads. Replace it at each oil change for a proper seal.