Parts for your 1999 Daihatsu Gran move-Oil pump

1999 Daihatsu Gran Move oil pump — what it does and how to look after it

According to the Daihatsu L7 Gran Move/Pyzar Factory Service Manual (Lubrication System section) and the Daihatsu Electronic Parts Catalogue for L7 models (engine lubrication group), the 1999 Gran Move’s engines (commonly the 1.6-litre HC‑EJ, with some markets also seeing a 1.5‑litre HE‑series) are fitted with a crankshaft-driven, internal trochoid/gear-type oil pump mounted at the front of the engine. So yes — an oil pump is absolutely relevant and used on this vehicle.

The oil pump’s whole job is to push clean, pressurised oil through the engine so bearings, cam lobes, lifters and bores stay lubricated and cool. On the Gran Move, the pump draws oil through the sump pick-up strainer, regulates pressure via a relief valve and feeds the galleries. Without it, the low oil pressure light would glow, metal would meet metal, and things would get expensive fast.

As part of servicing a 1999 Daihatsu Gran Move oil pump, the smartest move is preventative care. Keep to the correct oil spec and viscosity for local climate (many owners run a quality 5W‑30 or 10W‑40 meeting the manual’s API requirements), change oil and filter on time, and make sure the sump pick-up isn’t choked with sludge. If the oil light flickers at idle when hot, a proper pressure test with a mechanical gauge should be done before blaming the pump — tired bearings, thin oil or a dodgy pressure switch can mimic pump issues.

If replacement is needed, it’s not a quick driveway spin: the pump lives behind the front cover and is driven by the crank. A competent tech will:

• Inspect and clean the pick-up strainer and sump