Parts for your 1999 Daihatsu Gran move-Oil seals

1999 Daihatsu Gran Move oil seals

Oil seals are absolutely fitted to the 1999 Daihatsu Gran Move. Factory technical sources for the model (sold locally as the Gran Move and globally as the Daihatsu Pyzar, M100/M110 series) — including the Daihatsu workshop manual and the Daihatsu/Toyota electronic parts catalogue — list multiple engine and transaxle oil seals, such as the front crankshaft seal, rear main seal, camshaft seal, and transaxle/drive-shaft output seals. They’re essential to keeping engine and gearbox oil where it should be.

For this Gran Move, oil seals do the quiet, critical job of holding back oil at rotating shafts. Up front, the crank seal and cam seal sit behind the timing belt covers, stopping oil from weeping onto the belt and pulleys. Down the back of the engine, the rear main seal keeps engine oil from sneaking into the bellhousing. In the gearbox, the drive-shaft (axle) seals prevent transaxle oil leaks where the CV shafts plug in. When these seals age or harden, owners may notice oil mist around the timing covers, a drip from the bellhousing, or wetness at the inner CVs.

As part of regular servicing, it’s smart to:

• Check for oil misting around the timing covers, sump and bellhousing every service.
• Replace the front crank and cam seals whenever the timing belt is off (a common-sense add-on while access is easy).
• Renew axle seals if a CV shaft is removed, or if there’s sweating around the transaxle outputs.
• Inspect the PCV/breather system — excess crankcase pressure can make fresh seals leak.

There’s no fixed kilometre interval for oil-seal replacement, it’s condition-based. If the Gran Move is due for a timing belt, popping in quality OEM or Viton seals at the same time avoids doing the job twice. For manuals, a rear main seal is worth doing when the clutch is out. For autos, consider it if the transmission ever needs to come off.

Signs it’s time to act include:

1. Oil on the driveway or fresh oil on the timing cover/undertray.
2. Burning oil smell after a drive (oil on the exhaust or downpipe).
3. Gearbox oil weep near inner CV joints or a low transaxle oil level.

Left too long, a leaking seal can contaminate the timing belt, soften engine mounts, or drop gearbox oil low enough to damage bearings. A tidy seal job, done with the right tools and proper seating depth, keeps a 1999 Gran Move running sweet with less mess under the bonnet.

Popular questions about 1999 Daihatsu Gran Move oil seals

Where are the common oil seals on a 1999 Gran Move?
The typical ones are the front crankshaft seal and camshaft seal behind the timing covers, the rear main seal between the engine and gearbox, and the transaxle output (drive-shaft) seals where the CV shafts enter the gearbox. Each handles rotating shafts that need to be lubricated without letting oil escape.

How often should oil seals be replaced?
They’re usually replaced on condition rather than time. A practical approach is to renew the front crank and cam seals during a timing belt service, do the rear main when the clutch or gearbox is out, and replace axle seals when CV shafts are removed or if there’s visible weeping. Regular inspections at each service help pick issues early.

Is it safe to drive with a minor oil-seal leak?
Short trips may be okay, but it’s best not to put it off. A small engine leak can soak the timing belt or create smells and smoke, a gearbox leak can run the oil low and damage bearings. Top up as needed and book the repair sooner rather than later.