Parts for your 1998 Daihatsu Gran move-Exhaust gasket

1998 Daihatsu Gran Move exhaust gasket — what it does and when to replace it

Based on factory references — the Daihatsu G300-series (Pyzar/Gran Move) repair manual’s Exhaust section and the Daihatsu Electronic Parts Catalogue (EPC) for G30#/G31# models — the 1998 Daihatsu Gran Move is built with multiple exhaust gaskets. These include the exhaust manifold-to-cylinder head gasket, a sealing ring (donut) between the manifold/front pipe or catalytic converter flange, and, on some market variants, additional flange gaskets further down the system. So, yes, an exhaust gasket is fitted and it’s very much relevant on this model.

The exhaust gasket’s job is simple but crucial: keep hot exhaust gases sealed inside the system from the head all the way to the tailpipe. On a Gran Move, the manifold gasket stops leaks at the cylinder head where temperatures and pressures are highest, while the donut gasket allows a bit of flex between pipes without letting noise or fumes escape. When these seals do their thing, the engine breathes properly, the O2 sensor gets clean data, and there’s no raspy ticking or sooty blow-by under the bonnet.

As part of regular servicing, the exhaust gaskets don’t usually need scheduled replacement, but they should be checked any time there’s a rattle, a ticking noise on cold start, a whiff of fumes, or soot marks near a joint. If the manifold or front pipe is removed — say, for clutch, starter, or head work — the gaskets should be replaced as a matter of course. Reusing old ones is false economy on these cars.

Good practice on a 1998 Gran Move includes:

• Inspecting flange faces for pitting/warping and cleaning them flat before reassembly.
• Using quality manifold gaskets (typically multi-layer steel on many Daihatsus) and the correct style of donut ring at the front pipe.
• Fitting new spring bolts and nuts at the donut joint if they’re tired or corroded, so the joint can self-load and stay sealed.
• Torquing manifold nuts to spec in the factory sequence, engine cold. Recheck for leaks after a few heat cycles.
• Watching for symptoms: ticking under load, sulphury fumes, poor fuel economy, or a louder note from the engine bay.

With fresh gaskets and hardware, the Gran Move’s exhaust stays quiet, the neighbours stay happy, and the engine management can trim fuel properly for smooth running and good economy on Aussie and Kiwi roads.

Popular questions

Does the 1998 Daihatsu Gran Move actually have an exhaust gasket?
Yes. Factory documentation (Daihatsu G300-series manual and EPC) shows an exhaust manifold gasket at the head, plus a donut-style ring at the front pipe/cat joint, and sometimes additional flange gaskets further back depending on the variant.

How often should the exhaust manifold gasket be replaced?
There’s no fixed interval. Replace it whenever the manifold is removed or if there are leak symptoms — ticking on cold start, soot around the flange, exhaust smell in the cabin, or scan data showing fuel trims skewed from a pre-cat leak.

What’s the best way to prevent repeat leaks after fitting new gaskets?
Make sure the mating faces are flat and clean, use the correct gasket types, replace tired spring bolts at the donut joint, and torque manifold fasteners to spec in the right sequence with the engine cold. A quick post-service check after a few heat cycles helps catch anything early.