Parts for your 2016 Toyota Crown-Oil cap

2016 Toyota Crown oil cap — what it does and how to look after it

Yes, an oil cap is absolutely used on the 2016 Toyota Crown. Technical references including the Toyota Crown (S210 series, 2012–2018) Owner’s Manual engine bay layout, and Toyota’s Electronic Parts Catalogue (EPC) list a “Cap sub‑assy, oil filler” for the Crown’s common engines of the era (such as 4GR‑FSE/2GR‑FSE V6, 2AR hybrid variants, and 8AR‑FTS turbo). The cap sits on the rocker/valve cover and is removed to add engine oil.

On the 2016 Crown, the oil cap’s job is simple but crucial: it seals the filler neck so dust, moisture, and grit can’t get into the engine, helps maintain proper crankcase ventilation behaviour, and stops oil mist from escaping. A good cap keeps the lubricant clean, the PCV system happy, and the engine bay tidy.

During routine servicing, it’s worth giving the cap a quick once‑over. Wipe around the filler area before removing it so nothing falls inside, then check the cap’s threads and the rubber gasket or O‑ring. If the gasket is flattened, brittle, cracked, or missing, it’s time to replace the cap (or the seal, if it’s serviceable separately). After refitting, tighten the cap by hand until it seats firmly—no need to heave on it. Start the engine and look for any weeping around the cap area.

Owners should stick with a genuine or quality OEM‑equivalent oil cap matched to their Crown’s engine code. Toyota often prints the recommended viscosity (commonly 0W‑20 for many 2016 Crowns) right on the cap, but always follow the Owner’s Manual or local service data for the correct grade. Mixing cap styles or using a loose‑fitting generic cap can lead to minor oil leaks or ventilation issues.

When to replace the oil cap:

• Visible cracks, warped plastic, or perished seal
• Persistent oil misting around the filler area after proper tightening
• Damaged or sloppy threads, or a cap that no longer seats squarely
• Lost cap—don’t drive without one

As a quick service tip, keep the cap somewhere clean while changing oil, and if the mechanic notes any sealing or ventilation concerns, a fresh cap is a cheap fix that protects a very expensive engine.

Popular questions about the 2016 Toyota Crown oil cap

Where is the oil cap on a 2016 Toyota Crown?
It’s on the top of the engine, usually right on the rocker/valve cover. Look for a round, twist‑off cap marked “Engine Oil” and often showing the recommended viscosity. On the S210 Crown, it’s easy to spot once the engine cover is lifted or removed if fitted.

What oil grade is printed on the cap—do I have to use that?
Many 2016 Crowns show 0W‑20 on the cap. That’s a great guide, but the final word is the Owner’s Manual and local service specs for your exact engine and climate. If the manual lists alternatives, they’re fine to use—stick to reputable brands and change at the recommended intervals.

Can driving without an oil cap damage the engine?
Yes. Without a cap, contaminants can enter, oil can splash out, and crankcase ventilation can go wonky. If the cap goes missing, don’t keep driving—fit the correct replacement before running the engine again.