ERC4995 - Core Plug – 18.25mm

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OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.

Core Plug seals a casting core hole in the cylinder block, closing off the coolant jacket left open by the casting process.

Pressed into the block, it retains coolant within the water jacket and can be displaced by ice expansion to give a measure of frost protection. Nominal diameter 18.25mm.

Vehicle Model Land Rover Defender up to 2016

Fitment Notes DEFENDER 1987-2006 — cylinder block core plug, 2.25L petrol, 2.5L petrol, 2.5L NA diesel, 2.5L turbodiesel (19J / 12J / 200TDi); diameter 18.25mm

Alternative Codes

ERC4995

In stock 16 units

12 · Gouda 4 · 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 core plug used for?

The core plug seals a casting core hole in the cylinder block, closing the coolant jacket left open by the casting process. Pressed into the block, it holds coolant in the water jacket and can pop out under ice expansion, giving a measure of frost protection. Nominal diameter is 18.25mm.

How many core plugs does an engine block need?

An engine block typically carries several core plugs along the side and ends of the block. When one corrodes or weeps, it's common practice to replace the full set while access is open, since the others are usually the same age. Order the quantity your block requires.

Which Land Rover engines does the 18.25mm core plug fit?

The 18.25mm core plug fits Defender 1987-2006 four-cylinder blocks, covering the 2.25L petrol, 2.5L petrol, 2.5L naturally-aspirated diesel and 2.5L turbodiesel including the 200TDi. Confirm the plug diameter matches the bore in your block before fitting, as blocks use more than one size.