524765 - Cup Plug

- €1,90

€1,90

€1,90 - €1,90

€1,90

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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.

Cup Plug - a cup-type core plug (also known as an expansion or welch plug) that seals a casting core hole in the cylinder block or cylinder head.

Driven into its machined bore, it closes the openings left by the casting process and retains coolant within the water jacket.

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 — cylinder head/block core plug; 2.25 petrol, 2.5 petrol, 2.5 NA diesel, 2.5 turbo diesel, 200 TDi, 300 TDi
DISCOVERY 1 1989-1998 — 200 TDi, 300 TDi (From FA393361 to WA799999)
RANGE ROVER CLASSIC 1986-1994 — V8 EFI petrol, 200 TDi, 2.5 TDi (1986-1991 to VIN HA610293; 1992-1994 from JA610294)

Alternative Codes

524765524765ES

In stock 95 units

95 · Gouda 0 · 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 is the Cup Plug used for?

The Cup Plug is a cup-type core plug, also called an expansion or welch plug, that seals a casting core hole in the cylinder block or head. Driven into its machined bore, it closes the openings left by casting and keeps coolant inside the water jacket.

Which Land Rover models and engines does this Cup Plug fit?

The Cup Plug fits Land Rover Defender 1987-2006 (2.25 and 2.5 petrol, 2.5 naturally aspirated and turbo diesel, 200 TDi and 300 TDi), Discovery 1 with 200 or 300 TDi, and Range Rover Classic V8 EFI petrol and TDi. Check your engine before ordering.

Why do core plugs like this fail on Land Rovers?

Core plugs like this Cup Plug typically fail by corroding through from the coolant side, then weeping or leaking coolant. They're often renewed as a set during an engine rebuild or when a leak appears, since access is easier with the engine stripped.

How is the Cup Plug fitted?

The Cup Plug is driven squarely into its machined bore with a suitable drift or socket until seated, usually with a smear of sealant. It's a straightforward job with the right drift, though plugs behind the flywheel or manifold can need more dismantling to reach.