Parts for your 1998 Nissan Navara-Oil pump

1998 Nissan Navara oil-pump: purpose, upkeep, and when to replace

Yes, the 1998 Nissan Navara (D22) uses an engine oil-pump. Technical references including the Nissan D22 Factory Service Manual (Lubrication section), the KA24E and TD27 engine workshop manuals, and Nissan FAST parts catalogues list a crank-driven oil-pump for both the 2.4-litre KA24E petrol and the TD27 2.7-litre diesel. There’s no variant of the ’98 Navara without an oil-pump, as it’s fundamental to the engine’s pressurised lubrication system.

The oil-pump on a 1998 Navara does the heavy lifting for engine longevity. It drags oil through the pickup strainer in the sump and sends it under pressure to crankshaft bearings, cam gear, timing components, and the top end, forming that thin protective film that stops metal-on-metal grief. It also helps carry heat away and flushes tiny contaminants back to the filter. A pressure relief valve in the pump housing keeps things in check at higher revs. On KA24E petrol engines, the gerotor-style pump is built into the front cover and driven by the crank, on TD27 diesels, it’s an internal gear/trochoid unit in the timing case, also crank-driven.

As part of regular servicing, the pump itself isn’t a routine replacement item, but its health depends on clean, correct-spec oil and timely filter changes. For Aussie and Kiwi conditions, many owners follow a 10,000 km or 6–12 month interval (or sooner if towing, dusty roads, or lots of short trips). Use the oil grade specified for the engine variant and climate, keep sealant use minimal during sump or front cover work, and make sure the pickup screen stays clear.

When to consider replacement? Look for:

• Oil warning lamp that flickers at hot idle or stays on longer than a second after start
• Low pressure verified with a mechanical gauge
• Rattly top end or bearing knock, especially hot
• Visible scoring or end-clearance out of spec during engine work

Smart replacement practice on a Navara includes inspecting the pickup and relief valve, renewing front cover/sump gaskets and crank seals, and priming the pump with assembly lube. Pre-fill the filter, disable ignition/fuel, and crank until pressure builds, then fire it up and confirm hot idle pressure and leaks. If pressure is marginal, don’t just blame the pump—worn bearings and galleries can be the real culprit, so gauge testing and clearances matter before bolting on new bits.

Popular questions about 1998 Nissan Navara oil-pump

Does a 1998 Navara definitely have an oil-pump, and where is it?
Absolutely. All 1998 D22 engines have one. On the KA24E petrol it’s integrated into the front cover and driven off the crankshaft. On the TD27 diesel it sits in the timing case, also crank-driven. Access typically involves front cover/timing work, and sometimes sump removal to check the pickup.

How can they tell if the oil-pump or something else is causing low oil pressure?
First, run a mechanical gauge to confirm the dash light isn’t lying. If pressure is low, pull the sump to inspect the pickup for sludge, check for bearing wear, and measure pump clearances against workshop specs. Many “pump failures” turn out to be worn bearings or blocked pickups, so diagnose before replacing.

Do they need to prime a new oil-pump?
Yes. Pack the pump with assembly lube or clean engine oil, pre-fill the filter, then crank with ignition/fuel disabled until the gauge shows pressure. This avoids a dry start and protects bearings on first fire-up.