Parts for your 1997 Daihatsu Gran move-Oil cap

1997 Daihatsu Gran Move oil cap — purpose, care, and when to replace

Referencing technical sources including the Daihatsu Gran Move/Pyzar owner’s handbook diagrams, the factory service manual for the G3-series platform, and Daihatsu’s electronic parts catalogue listings for the petrol four‑cylinder engines of this model, the 1997 Daihatsu Gran Move is indeed fitted with an engine oil filler cap on the cam/rocker cover. So yes — the oil cap is relevant and used on this vehicle.

On a 1997 Gran Move, the oil cap does a simple but vital job: it seals the oil filler opening, keeping dust and moisture out while helping the crankcase ventilation system maintain the right pressure. A good cap (and its rubber O‑ring or seal) also stops oil mist from escaping, which keeps the top of the engine clean and helps the emissions gear do its thing.

As part of regular servicing, it’s smart to give the oil cap a quick look every time the engine oil’s checked or changed (typically every 10,000 km or 6 months for many 90s Daihatsus). If the cap is loose, cracked, or the seal has gone hard or flat, swap it out. A tired cap can leave tell‑tale oil film around the filler area, a whiff of burnt oil under the bonnet, or even a slight idle change if unmetered air sneaks in.

Replacing or refitting is straightforward:

1. Let the engine cool, then wipe the area around the filler to keep grit out.
2. Twist the cap counter‑clockwise to remove and inspect the sealing ring for nicks or flattening.
3. Lightly oil a new O‑ring if you’re re‑sealing, then hand‑tighten the cap until it seats firmly — no tools needed.

When buying a replacement, stick with a cap specified for the Gran Move/Pyzar engines. Genuine or quality aftermarket is fine, just match the fit and sealing style. Most caps are non‑vented because the PCV system handles breathing, so don’t substitute a “vented” cap unless the service manual explicitly allows it.

Driving without an oil cap isn’t worth the drama. It can fling oil out, make a mess of the engine bay and under‑bonnet insulation, and potentially drop oil level faster than expected. Keeping a healthy cap in place helps protect the engine, the environment, and the wallet.

FAQs

Where is the oil cap on a 1997 Daihatsu Gran Move?
It’s on the top of the engine’s cam/rocker cover, usually marked “Engine Oil”. Look for a round, twist‑off cap accessible as soon as the bonnet’s up.

What oil cap fits my 1997 Gran Move?
Use a cap specified for the Gran Move/Pyzar petrol engines from that era. Match by VIN or engine code and ensure the cap includes the correct non‑vented design and sealing ring.

Why is there oil around my oil cap?
Common causes are a perished O‑ring, a cap that’s not fully seated, or excess crankcase pressure from a tired PCV system. Clean the area, replace the seal or cap if needed, and have the PCV checked during service.