Parts for your 2006 Mitsubishi Pajero-Sump plug washers

2006 Mitsubishi Pajero sump plug washer — what it is and why it matters

Based on Mitsubishi’s factory literature and widely used technical references, the 2006 Mitsubishi Pajero is fitted with a sump plug sealing washer (crush washer). The Pajero workshop manual for NM/NP/NS series engines (including the 3.2 Di‑D 4M41 and 3.8 V6 6G75) specifies refitting the drain plug “with a new gasket” during engine oil replacement, and the Mitsubishi ASA parts catalogue lists an oil drain plug gasket (commonly referenced as MD050317, an M14 crush washer) for these models. Haynes/aftermarket service guides echo the same instruction: replace the sump plug washer at each oil change.

On this Pajero, the sump plug washer is a small, soft metal ring—usually aluminium or copper—that crushes slightly when the drain plug is torqued. That controlled crush creates a reliable seal between the plug and the sump, stopping weeping, protecting the sump’s sealing face, and letting the plug reach the correct torque without gouging the pan.

For routine servicing, it’s best practice to replace the washer every oil change. These washers are designed to be single‑use, once compressed, they don’t spring back the same way next time. Reusing them risks slow leaks, drips on the driveway, or having to over‑tighten the plug to make it seal. Genuine or quality aftermarket M14 crush washers suit most 2006 Pajero engines, if unsure, match by the plug’s thread and seat style or check by VIN.

When tightening the drain plug with a fresh washer, typical torque for Pajero engines of this era is around 39 N·m (always confirm for the exact engine code). Over‑tightening can distort the washer, mark the sump face, or strip threads, under‑tightening can allow seepage.

• Replace the washer at every oil change (don’t stack old washers).
• Clean the sump sealing face and plug head before refitting.
• Use aluminium or copper crush washers, avoid fibre washers unless specified.
• Check for any weeping after the first short drive, then re‑inspect at the next fuel stop.

Skimping on a washer isn’t worth the hassle. A new crush washer is cheap, takes seconds to fit, and keeps the 2006 Pajero tidy and leak‑free—exactly as Mitsubishi intended per the workshop manual and parts listings.

What size sump plug washer does a 2006 Pajero use?

Most 2006 Pajero variants use an M14 crush washer on the engine oil drain plug. That’s the common size found in Mitsubishi parts catalogues for NM/NP/NS models. Because some markets and engines can vary, it’s smart to confirm by VIN or measure the plug’s shank and the sump seat before buying in bulk.

Can the sump plug washer be reused?

It can be, but it shouldn’t be. The washer is a single‑use crush type, once compressed, it won’t seal as reliably again. Reusing is a common cause of slow leaks and over‑tightening. Popping in a fresh washer at every oil change is the low‑cost, no‑drama approach.

What torque should be used on the Pajero’s drain plug?

For 2006 Pajero engines, a typical spec is about 39 N·m, with a new crush washer fitted. Always confirm for the exact engine code in the service manual. Correct torque plus a fresh washer delivers a proper seal without risking thread damage.