Parts for your 1996 Daihatsu Gran move-Oil cap

1996 Daihatsu Gran Move Oil Cap — What It Does and How to Look After It

Based on factory documentation, the 1996 Daihatsu Gran Move (G300-series, also known as Pyzar in some markets) is fitted with a conventional engine oil filler cap. The Daihatsu workshop manual for the G300-series (Lubrication section) and the Daihatsu Electronic Parts Catalogue both list an oil filler cap and seal for the 1.5–1.6 litre petrol engines used in 1996 models. So the oil cap is absolutely relevant on this vehicle.

The oil cap’s job is straightforward but critical: it seals the oil filler neck on the top of the rocker/cam cover, keeping dust and moisture out while preventing oil vapour and splashes from escaping under the bonnet. A healthy cap helps the crankcase ventilation system behave as designed, keeps the engine bay tidy, and makes top-ups clean and simple. Most caps include a rubber O-ring or gasket and are labelled “Engine Oil”, sometimes with viscosity hints.

As part of routine servicing on a 1996 Gran Move, the oil cap deserves a quick once-over. Wipe the area before removing the cap, then check the seal for hardening, cracks, or flattening. Make sure the cap threads or bayonet lugs engage smoothly and that it seats square and snug by hand—no need to wrench it tight. If there’s oil misting around the cap, a fuelly smell, or visible seepage after a drive, the seal may be past it or the cap may be loose.

• Signs it’s time to replace: perished or swollen O-ring, cap won’t tighten securely, visible oil around the filler area, cap cracked or warped, or persistent fumes under the bonnet.
• Handy tip: if milky residue appears under the cap, that’s usually condensation from short trips, monitor closely. If it persists with coolant loss, get it checked.

Replacement is simple: match the cap to the vehicle by VIN or engine code, clean the filler neck, lightly oil the new O-ring, and tighten by hand until snug. Avoid driving without a cap, oil can spray out quickly and contaminants can enter the engine. If the engine shows recurring pressure at the cap, have the PCV/breather system inspected, as excess crankcase pressure can push past even a new seal.

For peace of mind, owners often refresh the cap and seal when they start seeing minor seepage, or every few years alongside a rocker cover gasket change.

Where is the oil cap on a 1996 Daihatsu Gran Move?

It sits on top of the cylinder head/rocker cover, usually a black plastic cap marked “Engine Oil”. Standing at the front of the car with the bonnet up, it’s easy to spot near the centre or one side of the cover.

Can it be driven without the oil cap?

No. Even a short run without the cap can fling oil across the engine bay and allow dirt or moisture into the engine. If the cap’s missing, fit the correct replacement before driving.

Does the Gran Move share its oil cap with other Daihatsu models?

Often, yes. Many G300-series Gran Move/Pyzar engines share cap fitment with contemporary Daihatsu models. Best practice is to confirm by VIN or engine code to get the correct cap and seal profile.