Parts for your 2001 Daihatsu Gran move-Oil pump

2001 Daihatsu Gran Move oil pump — purpose, servicing and replacement advice

Technical references confirm the 2001 Daihatsu Gran Move is fitted with an engine oil pump, so the part is absolutely relevant to this model. The factory workshop manual for the Gran Move/Pyzar (G3-series, late 1990s–2002) specifies a crankshaft-driven, trochoid/gear-type oil pump integrated at the front of the engine, and the Daihatsu Electronic Parts Catalogue lists an engine oil pump assembly for the common Gran Move engines of the era (including HE-series 1.5L and, in some markets, K3-series 1.3L). In other words, the Gran Move relies on a conventional pressure lubrication system with a proper oil pump and pickup.

On this 2001 Gran Move, the oil pump’s job is to pull oil through the pickup strainer, pressurise it, and feed the crankshaft, camshaft(s), lifters and other galleries, helping bearings live a long, happy life while carrying away heat and contaminants. Without steady pressure, hot-idle rattles, bearing wear and that dreaded red oil lamp become very real problems.

There’s no routine “replacement interval” for the pump itself, instead, sensible servicing keeps it healthy:

• Change oil and filter on time (typically every 10,000 km or 6 months in local conditions) using the correct grade, commonly 5W-30 or 10W-40 meeting API SJ/SL or better.
• Avoid sludge: frequent short trips or long drains can gum up the pickup screen and relief valve.
• Watch symptoms: oil light flicker at hot idle, noisy lifters on start-up, low gauge readings, or metallic glitter in oil.

If replacement or inspection is needed (for example, after a low-pressure diagnosis), expect sump removal and front cover access. A good workshop will:

1. Inspect and clean the pickup strainer and replace its O-ring/seal.
2. Check the pressure relief valve operation within the pump body.
3. Replace the front crank seal and apply the correct sealant to the timing/front cover as per the workshop manual.
4. Prime the pump with assembly lube and verify oil pressure on first start.

It’s worth noting that chronically low pressure isn’t always the pump’s fault, worn bearings, a tired pressure switch, or a blocked pickup can mimic a “bad pump”. Quality parts (genuine or reputable aftermarket), proper torque specs and cleanliness are key to a tidy job that lasts.

Popular questions about 2001 Daihatsu Gran Move oil pumps

Does the 2001 Gran Move actually have an oil pump, and where is it?
Yes. The Gran Move uses a crankshaft-driven, trochoid/gear-type pump housed at the front of the engine behind the timing cover, drawing oil through the sump pickup and feeding the main galleries.

What are the signs the oil pump or pickup needs attention?
Hot-idle oil light flicker, top-end rattle at start-up, or persistently low pressure are red flags. Sludge in the sump or a clogged pickup screen can starve the pump, so inspection often starts there before condemning the pump itself.

What oil should owners use to protect the pump?
A quality 5W-30 or 10W-40 that meets at least API SJ/SL, changed roughly every 10,000 km/6 months in Aussie and Kiwi conditions, helps keep the pump, relief valve and galleries clean and happy.