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ERR3457 - Cup Plug by PR2 Allmakes OEEngine Part Land Rover Range Rover Defender, Discovery, Range Rover

ERR3457 - Cup Plug

- €6,70
€6,70
€6,70 - €6,70
€6,70
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OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Brand PR2 Allmakes OE
Cup Plug (core plug) for the 2.5L 300TDi turbo-diesel engine, fitted to the cylinder block and head.

A cup plug is pressed into the core holes left by the sand cores during casting, sealing the coolant jacket. The cup-shaped pressing forms an interference fit in its bore to give a leak-tight seal against coolant pressure. Plugs are renewed when corroded or weeping, and during a full engine rebuild.
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 — 2.5L 300TDi
DISCOVERY 1 1989-1998 — 2.5L 300TDi
RANGE ROVER CLASSIC 1992-1994 — 2.5L TDi
Alternative Codes
ERR3457

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

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 a cup plug and what does it do?
A cup plug, also called a core plug, seals the core holes left in the casting when a 2.5L 300TDi block and head are made. The cup-shaped pressing forms an interference fit in its bore to give a leak-tight seal against coolant in the water jacket.
Where are cup plugs fitted on a 300TDi engine?
Cup plugs are fitted to the cylinder block and head of the 2.5L 300TDi engine, sealing the coolant jacket. An engine typically has several, so you may need more than one depending on which plug is corroded or weeping.
When should a cup plug be replaced?
Replace a cup plug when it's corroded or weeping coolant, and renew them as a matter of course during a full 300TDi engine rebuild. A failed plug typically lets coolant escape from the block or head and can cause overheating if ignored.