Parts for your 1997 Mitsubishi Lancer-Sump plug washers

1997 Mitsubishi Lancer sump-plug-washers: what they do and when to replace them

Based on the Mitsubishi CE Lancer workshop manual (1996–2003, Lubrication section), the Mitsubishi ASA/ASA-CAPS parts catalogue, and common service literature such as the Haynes Lancer manual (1992–2007), the 1997 Mitsubishi Lancer does use a sump-plug washer (also called a drain plug gasket). The part is listed as a replaceable sealing washer for the M14 x 1.5 drain plug, commonly referenced in parts catalogues as gasket MD050317 (with equivalent crush-washer options in copper or aluminium noted across service sources).

For this Lancer, sump-plug-washers are simple but crucial. They sit between the sump (oil pan) and the drain plug, creating a reliable seal so engine oil doesn’t weep out. The factory setup relies on a soft “crush” washer that deforms slightly at the correct torque to seal cleanly without having to over-tighten the plug. That’s why most manuals advise replacing the washer at every oil change and torquing the plug correctly (around 39 N·m for many CE Lancer engines per workshop guidance).

Keeping on top of the sump-plug-washers during routine servicing saves mess, money and headaches. A fresh washer helps avoid drips on the driveway, protects the sump threads from being overtightened, and makes the next service easier. If the old washer’s been reused too many times, it can harden, groove, or go out-of-round, leading to slow seeping that’s easy to miss until the level starts to drop.

• Replace the washer at each oil change. Copper and aluminium crush types are both fine—just match the size to the 14 mm drain plug seat used on the 1997 Lancer.
• Clean the mating surfaces. Wipe the sump face and plug head so the new washer beds properly.
• Tighten to spec. Aim for the workshop torque (about 39 N·m for many CE Lancer variants). Don’t “gorilla” it—let the washer do the sealing.
• Check for leaks after a short drive. A quick look under the bonnet and underneath can catch a weep early.

If stuck, copper washers can sometimes be annealed in a pinch, but on a Lancer it’s inexpensive and smarter to fit a new quality washer every service. Genuine MD050317 or a high-quality equivalent that suits the M14 x 1.5 plug will keep the 1997 Mitsubishi Lancer happy. Note that some replacement sumps or aftermarket plugs may use a bonded seal—so always confirm what’s fitted before buttoning up.

What size sump-plug-washers does a 1997 Mitsubishi Lancer use?

Most 1997 Lancer engines (CE series) use an M14 x 1.5 drain plug with a 14 mm crush washer. Mitsubishi catalogues commonly list the gasket as MD050317 with suitable copper or aluminium equivalents available. If the car has an aftermarket sump or plug, measure the inner diameter or match to the existing plug before purchase.

How often should the sump-plug-washers be replaced on a 1997 Lancer?

Replace the washer at every oil change. It’s designed to deform once to seal properly. Reusing old washers can lead to seepage or the need to overtighten the plug. Tighten the plug to the workshop torque (around 39 N·m for many CE engines) and check for any signs of weeping after the first drive.

Can the old washer be reused or annealed?

Reusing is not recommended. A copper washer can be annealed in an emergency, but it’s a workaround, not best practice. A fresh crush washer is inexpensive insurance against leaks and stripped threads, and it’s what Mitsubishi service documentation expects during routine servicing.