Parts for your 2016 Daihatsu Bego-Sump plug washers

2016 Daihatsu Bego sump plug washers — what they do and when to replace them

Yes, the 2016 Daihatsu Bego uses a sump plug washer. Technical references from the factory workshop literature for the F700/F710 series (3SZ‑VE engine) and the equivalent Toyota Rush/Terios service documentation specify an oil drain plug with a crush-type gasket that must be replaced when removed. The Toyota/Daihatsu electronic parts catalog for the 3SZ‑VE oil pan likewise lists a dedicated drain plug gasket, confirming a washer is part of the design. These sources treat the washer as a consumable seal to be renewed at oil services.

On the 2016 Bego, the sump plug washer (often an aluminium crush washer) sits between the drain plug head and the oil pan face. Its whole job is to deform slightly when tightened, creating a reliable seal so engine oil stays where it should. Without a fresh washer, the plug can bottom out metal-to-metal or clamp on a hardened old ring, which risks dribbles, weeping, or a plug that’s over-torqued trying to stop a leak.

As part of routine servicing, a new washer should be fitted at every oil change. It’s a low-cost item that prevents mess, protects the sump threads, and keeps the plug torque consistent. Owners who see a light film of oil around the plug, a single drop on the driveway overnight, or smell hot oil after a drive are often dealing with a tired washer rather than a deeper issue.

Because the Bego shares its running gear with the Toyota Rush/Terios, parts counters will commonly supply a 3SZ‑VE-compatible crush washer. While many of these applications use a 12 mm aluminium gasket, it’s smart to confirm by VIN or by checking the plug’s thread diameter and the pan face. The service approach stays the same: clean the sealing face, fit a new washer, and tighten the plug to the specified torque from the workshop manual rather than “by feel”.

Handy pointers for owners and techs:

• Always replace the washer at each oil change, don’t reuse a crushed one.
• Inspect the sump sealing face for nicks, lightly dress if needed.
• Avoid sealants, the crush washer provides the seal when correctly torqued.
• If a leak persists with a new washer, check plug condition and sump threads.

Popular questions about 2016 Daihatsu Bego sump plug washers

What size washer does the 2016 Bego use?
Most Begos with the 3SZ‑VE engine use a crush washer sized to the plug’s thread (commonly 12 mm on many Toyota/Daihatsu applications). Because markets and supersessions vary, the safest bet is to match by VIN or measure the plug diameter and shoulder. Any reputable parts counter familiar with the Rush/Terios/Bego will confirm the correct washer.

How often should the washer be replaced?
Every oil change. The washer is designed to deform once to seal, reusing it can lead to seepage or the need to over-tighten the plug. A new washer each service keeps the torque predictable and the sump face happy.

Can the old washer be reused in a pinch?
It can be physically refitted, but it’s not recommended. A previously crushed washer won’t conform properly a second time, which can cause slow leaks or make removal tougher next time. Keeping a few new washers on hand is cheap insurance against hassle and spills.