Parts for your 2018 Suzuki Splash-Oil cap

2018 Suzuki Splash oil cap — what it does and how to look after it

Yes, the 2018 Suzuki Splash uses an oil cap. Technical references including the Suzuki Splash/Ritz Owner’s Manual (K10B/K12B engines), the Suzuki K12B engine workshop literature, and Suzuki’s Electronic Parts Catalogue all identify a screw-in oil filler cap on the top of the cam/rocker cover. So, an oil cap is absolutely relevant and fitted to this vehicle.

On the Splash, the oil cap does more than just provide a place to pour oil. It seals the engine so the crankcase ventilation system can work properly, keeps dust and moisture out, and stops oil mist from escaping under load. A healthy cap and O-ring help maintain stable idle quality and keep the top of the engine clean. It’s a simple part that quietly prevents big headaches.

As part of routine servicing in Australia and New Zealand, it’s smart to check the cap every 10,000 km or 12 months (or whenever the engine oil is changed). Look for a perished or flattened O-ring, cracks in the cap body, or oily residue radiating from the filler neck. If there’s a whiff of oil or visible weeping around the cap after a drive, the seal is probably past its best and it’s time to replace it with a quality OEM-equivalent.

Replacement is straightforward and doesn’t need special tools. Avoid over-tightening — the cap should be hand-tight and seat squarely, cross-threading the plastic threads on the alloy cover is easy and expensive to fix. A light smear of clean engine oil on the O-ring before reinstalling helps the seal bed in without sticking. After refitting, let the engine idle for a minute and check for any fresh misting.

• Inspect the cap and O-ring each service interval.
• Clean the filler neck and threads when changing oil.
• Replace the cap if the O-ring is brittle, missing, or the cap no longer tightens positively.
• Never drive without the cap — oil can spray out, contaminate the bay, and drop the oil level.

Whether the Splash has the K10B 1.0-litre or K12B 1.2-litre petrol engine, the oil cap sits on the valve cover, typically marked “OIL” and often with the viscosity symbol. Keeping it tidy and sealing well is cheap insurance for the little Suzuki’s longevity.

Popular questions about 2018 Suzuki Splash oil caps

Where is the oil cap on a 2018 Suzuki Splash?
The oil filler cap is on the top of the engine’s valve (rocker) cover, slightly offset to one side. It’s a round, screw-in cap usually marked with an oil can symbol and the word OIL. On both K10B and K12B engines, it’s clearly visible when the bonnet is up.

How do you know the oil cap O-ring needs replacing?
If there’s light oil misting around the cap, a brittle or flattened O-ring, or the cap no longer tightens with a firm stop, the seal is likely done. You might also notice a faint oil smell after a drive. Swap the O-ring or the complete cap to restore a proper seal.

Can you drive if the oil cap is missing?
No — it’s risky. Without the cap, oil can splash out onto hot components, making a mess and potentially creating smoke. You can also lose enough oil to harm the engine. Fit a correct cap before driving.