Parts for your 1997 Daihatsu Gran move-Oil pump

1997 Daihatsu Gran Move oil pump — purpose, care and replacement

Yes, the 1997 Daihatsu Gran Move (G300 series, commonly fitted with the HC‑EJ 1.5‑litre petrol engine) uses an engine oil pump. Technical references that document the factory-fitted, crankshaft‑driven trochoid/inner‑gear pump include: Daihatsu Pyzar/Gran Move G300 Series Workshop Manual, Engine Mechanical—Lubrication System (Oil Pump), Daihatsu Electronic Parts Catalogue (EPC), Group 15—Lubrication (oil pump assembly for HC‑EJ), and the Haynes Daihatsu Charade 1987–2000 manual covering HC‑E/HC‑EJ engines (oil pump removal/installation and inspection). Those sources confirm the pump is integral to the lubrication system on this model.

On this Gran Move, the oil pump’s job is straightforward but critical: pull oil from the sump, pressurise it, and push it through galleries to bearings, cam gear, and lifters, keeping everything cool, clean, and slippery. It’s mounted at the front of the block and driven directly off the crank, so it responds instantly with engine speed. The pressure relief valve inside the pump stops over‑pressure at high revs, while a pickup and strainer keep big nasties out.

There’s no scheduled replacement interval for the pump itself, with regular servicing it’ll usually last the life of the engine. What really keeps it happy is consistent oil and filter changes (every 10,000 km or 6 months is a good Aussie/Kiwi rule for older engines), using the right viscosity and an API‑rated oil that suits local climate. Letting oil turn to sludge is the fast track to a clogged pickup and tired pump.

If the oil warning lamp flickers at hot idle, there’s a rattly top end on cold starts, or there are metallic flecks in drained oil, the lubrication system deserves a proper check with a mechanical gauge. If the pump is worn or the relief valve is sticky, replacement is sensible—often done during a timing belt service because access requires removing the crank pulley and front covers. Fresh seals (especially the front crank seal and pump O‑ring), a spotless sump and pickup, and priming the pump with clean oil before first start are must‑dos.

1. Confirm pressure with a test gauge and rule out a weak sender.
2. Inspect the pickup screen and sump for sludge or sealant debris.
3. Replace pump if rotor-to-body clearances are beyond spec, use OEM‑quality parts.
4. Refill with correct oil, crank with ignition disabled to build pressure, then recheck for leaks.

Technical sources referenced: Daihatsu Pyzar/Gran Move G300 Workshop Manual (Engine Mechanical—Lubrication System, Oil Pump), Daihatsu EPC Group 15—Lubrication (HC‑EJ oil pump assembly), Haynes Service & Repair Manual—Daihatsu Charade 1987–2000 (HC‑E/HC‑EJ oil pump procedures).

Popular questions

Does the 1997 Daihatsu Gran Move actually have an oil pump?
Yes. Factory documentation for the G300 series (HC‑EJ engine) specifies a crank‑driven trochoid oil pump in the front cover, and the EPC lists the pump, relief valve and pickup as serviceable components. It’s a standard four‑stroke lubrication setup.

When should the oil pump be replaced on a Gran Move?
There’s no fixed kilometre interval. Replacement is considered when verified low oil pressure, excessive internal pump wear, a stuck relief valve, or a damaged pickup is found. Many technicians pair the job with a timing belt service due to overlapping labour.

How can owners look after the oil pump on these cars?
Regular oil and filter changes, avoiding silicone sealant debris during sump work, using the correct viscosity oil, and ensuring the pickup stays clean are the big wins. After major engine work, always prime the pump and build oil pressure before letting it fire.