90602064 - Oil Pump Relief Plunger

- €5,20

€5,20

€5,20 - €5,20

€5,20

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Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Oil Pump Relief Plunger is the pressure-relief valve plunger within the engine oil pump, part of the lubrication system on the 3.5L V8 petrol engine.

The plunger works against a calibrated spring to limit maximum oil pressure: when pump output exceeds the set threshold it lifts to open a bypass, returning excess oil and protecting the lubrication circuit from over-pressure.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994

Fitment Notes DEFENDER 1987-2006 — 3.5L V8 petrol (twin carb)
DISCOVERY 1 1989-1998 — 3.5L V8 petrol (twin carb & EFI); also serviced as part of a kit
RANGE ROVER CLASSIC 1986-1994 — 3.5L V8 petrol (twin carb & EFI); also serviced as part of a kit

Alternative Codes

90602064

In stock 6 units

5 · Gouda 1 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the oil pump relief plunger do?

The oil pump relief plunger is the pressure-relief valve plunger inside the engine oil pump on the 3.5L V8 petrol engine. It works against a calibrated spring to limit maximum oil pressure, lifting to open a bypass when pump output exceeds the set threshold so the lubrication circuit isn't over-pressured.

Which Land Rovers use this oil pump relief plunger?

This relief plunger fits the 3.5L V8 petrol engine in the Defender, Discovery 1 and Range Rover Classic, in both twin carb and EFI versions. It sits in the oil pump within the engine lubrication system, so confirm your vehicle has the 3.5L V8 before ordering.

What are the signs of a worn oil pump relief plunger?

A sticking or worn relief plunger typically shows as low or erratic oil pressure, because it can't seal the bypass correctly against its spring. On the 3.5L V8 this affects the whole lubrication circuit, so it's worth checking the plunger and its bore when oil pressure problems appear.