Parts for your 1990 Nissan Primera-Sump plug washers

1990 Nissan Primera sump-plug-washers

Yes, the 1990 Nissan Primera uses a separate sump plug sealing washer. The Nissan Primera P10 factory service manual (Lubrication section) instructs replacing the drain plug gasket whenever the plug is removed, and the Nissan FAST/EPC parts catalogue lists a dedicated “Gasket – Drain Plug” for P10 engines (commonly 11026-01M02, superseded by 11026-4N200, 14 mm). The Haynes Service & Repair Manual for Nissan Primera (1990–2002) echoes this, advising the sealing washer be renewed on refitting the sump drain plug. So a sump plug washer is both relevant and designed-in on the 1990 Primera.

On this model, the sump plug washer is a soft “crush” gasket that sits between the drain plug head and the sump. Its job is to deform slightly when tightened, filling micro-gaps and sealing engine oil inside the pan. Without it, or if it’s reused too many times, oil can weep out, leaving tell-tale drips on the driveway and a messy underbody.

As part of regular servicing on a 1990 Nissan Primera, the washer should be replaced at every oil change. Genuine-style aluminium 14 mm crush washers are typical on GA16 and SR20 petrol P10s, with suitable copper equivalents also available. The plug and sump sealing face should be wiped clean, the new washer slipped onto the plug, and the plug tightened to the workshop spec—snug, not gorilla-tight—so the washer crushes evenly without risking damage to the aluminium pan threads.

Handy tips for keeping it tidy and leak-free:

• Always have a couple of spare 14 mm crush washers on hand before an oil change.
• Inspect the plug for chewed threads or a mushroomed sealing face, replace the plug if it’s dodgy.
• If the old washer has bonded to the pan, gently remove it without gouging the surface.
• Don’t stack old washers, use one correct washer, once.
• If experimenting with a magnetic aftermarket plug, make sure the seating face accepts a standard crush washer and still torques down properly.

Signs the washer needs attention include fresh oil mist around the plug, a drip after shutdown, or a plug that never seems to stay dry even when tightened. In those cases, fit a fresh washer first, if it still seeps, check plug condition and thread integrity before going harder on the spanner.

Popular questions about 1990 Nissan Primera sump-plug-washers

What size sump plug washer does a 1990 Primera use?

Most 1990 P10 Primera petrol engines use a 14 mm crush washer (Nissan gasket 11026-01M02 or 11026-4N200). Always match to the engine code and VIN, as some variants and markets can differ.

How often should the sump plug washer be replaced?

Every oil change. It’s a single-use crush washer designed to deform once for a reliable seal. Reusing it invites weeping and drips.

Can a leaking sump plug be fixed by tightening it more?

Usually no. Over-tightening risks stripping the aluminium sump threads. Fit a new correct washer, clean the seating faces, and tighten to the workshop spec. If it still leaks, replace the plug or inspect the pan threads.