Parts for your 2002 Toyota Caldina-Sump plug washers

2002 Toyota Caldina sump plug washers — what they do and when to replace

Yes, the 2002 Toyota Caldina uses a sump plug washer (crush washer). Toyota’s Electronic Parts Catalogue for JDM Caldina variants (e.g., ZZT241 1ZZ‑FE, AZT241 1AZ‑FE, and ST246 3S‑GTE) lists an aluminium drain plug gasket, commonly Toyota part number 90430‑12031, under the Oil Pan & Strainer section. Toyota workshop manuals for these engines also state “install the drain plug with a new gasket” during engine oil replacement. That’s the factory guidance and the reason workshops always keep a stack of these handy.

On the Caldina, the sump plug washer’s main job is to seal the gap between the drain plug and the sump so engine oil doesn’t weep out under heat and vibration. It’s a soft, crushable ring (usually aluminium) that deforms slightly as the plug is torqued, creating a reliable, reusable-thread yet single-use seal. Because it crushes predictably, it also helps achieve accurate torque at the plug without overtightening the threads in the alloy sump — a big win for long-term durability.

Best practice is to replace the washer at every oil change. In Aussie and Kiwi service schedules, that typically aligns with 10,000–15,000 km or 12 months, depending on driving conditions and oil choice. Reusing an old washer can lead to slow seepage, messy undersides, and in time, a stuck or overtightened plug as people try to “nip it up” to stop a drip. Fresh washer, correct torque, no drama. For most 2002 Caldina engines, the drain plug torque is around 35–40 N·m — check the exact spec for the engine code on the vehicle.

Most 2002 Caldina models take the 12 mm aluminium gasket (Toyota p/n 90430‑12031). Some markets and engine/pan combinations may vary, so if the plug thread differs, a 14 mm Toyota gasket may be specified. A quick check against the VIN or engine code will confirm the right size. Keeping a couple of spares in the service kit is smart and costs next to nothing.

• Replace the washer at every oil change.
• Clean the mating face on the sump and the plug head.
• Torque the plug correctly — don’t “gorilla-tighten” it.
• If there’s any weep after a change, swap the washer and recheck torque.

Popular questions

What size sump plug washer does a 2002 Toyota Caldina use?
Most 2002 Caldina variants use a 12 mm aluminium crush washer (Toyota p/n 90430‑12031). Some specific engine/sump combos can differ, so it’s worth confirming by engine code (e.g., 1ZZ‑FE, 1AZ‑FE, 3S‑GTE) or checking the existing plug size before purchase.

How often should the washer be replaced?
Every oil change. The washer is designed to crush once and provide a perfect seal. Reusing it risks seepage and over-tightening the plug, which can damage the sump threads. Toss a couple of spares in the glovebox and you’re sorted.

What are the signs a washer needs replacing?
Fresh oil drips under the plug, a damp oily film around the sump plug after a service, or the need to over-tighten the plug to stop a weep. If any of these show up, fit a new washer and torque the plug to spec.