Parts for your 2002 Daihatsu Gran move-Oil pump

2002 Daihatsu Gran Move Oil Pump — What It Does and When to Sort It

Yes, the 2002 Daihatsu Gran Move definitely runs an engine oil pump. Daihatsu’s factory documentation for the Gran Move/Pyzar G3-series (Lubrication System section), along with the HC‑EJ/HD‑EP H‑series Engine Workshop Manual and the K3‑VE Engine Repair Manual, all show a crankshaft-driven trochoid (inner rotor) oil pump integrated into the front timing case. So the oil-pump is very much relevant to this model, regardless of whether the vehicle is fitted with the belt-driven H‑series or the chain-driven K3‑series petrol engine.

On this Gran Move, the oil pump’s job is simple but critical: it pulls oil through the pickup strainer in the sump and pushes it under pressure through galleries to the crank and rod bearings, cam journals, and other moving bits. That pressurised oil film stops metal-on-metal contact, carries away heat, and sweeps fine debris to the filter. Without steady pressure, bearings wear fast, the top end gets rattly, and things go pear-shaped in short order.

Under normal servicing, the pump itself isn’t a frequent replacement item. What keeps it happy is clean oil at the right viscosity. For Aussie and Kiwi conditions, a quality engine oil meeting the spec in the owner’s manual (often 5W‑30 or 10W‑30 for many climates