506814 - Tappet Screw

- €4,70

€4,70

€4,70 - €4,70

€4,70

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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.

Tappet Screw - the valve-clearance adjusting screw in the rocker gear of the four-cylinder engine (3-bearing crankshaft), part of the valvetrain.

Threaded through the rocker arm with a UNF thread, it bears on the pushrod and is set against its locknut to establish the tappet (valve) clearance during adjustment.

Vehicle Model Land Rover Defender up to 2016
Land Rover Series 2 and 3

Fitment Notes DEFENDER — tappet screw, 2.25L engine (3-bearing crankshaft), UNF thread
SERIES 2 & 3 — tappet screw, 2.0L diesel and 2.25L engine (3-bearing crankshaft), UNF thread. Series 3 2.25 petrol: engines prefixed 901/904 and 361/364 suffix A & B only (AllMakes)

Alternative Codes

506814274370BR 0144

In stock 30 units

14 · Gouda 16 · 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 tappet screw (506814) used for?

The tappet screw is the adjusting screw that sets valve clearance. It threads through the rocker arm with a UNF thread, bears on the pushrod, and locks against its locknut. It's fitted to the 2.25L 3-bearing engine on the Land Rover Defender (up to 2016) and Series 2 and 3.

How many tappet screws are needed for a full valve adjustment?

Typically one tappet screw sits in each rocker arm, so a four-cylinder engine usually takes eight for a complete set. Many people renew them all when the threads or locknut seats are worn, keeping valve clearances consistent across the engine.

Does this tappet screw fit all Series 3 petrol engines?

Not all. On the Series 3 2.25 petrol it fits engines prefixed 901/904 and 361/364 with suffix A and B only. It otherwise suits the 3-bearing crankshaft engine on the Defender and Series 2 and 3, so check your engine prefix before ordering.

What's involved in fitting the tappet screw?

Fitting is part of a valve clearance adjustment. You typically slacken the locknut, turn the screw against a feeler gauge to set the clearance on the pushrod, then hold it and retighten the locknut. A basic spanner and feeler gauge are usually all that's needed.