UAJ1009 - Valve guide

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UAJ1009 Inlet and Exhaust Valve Guide for Later Leyland 4/98 and 6/98 Engines

Quality replacement valve guide suitable for both the inlet and exhaust valves on later Leyland 4/98 and 6/98 diesel engines.

Unlike earlier engines, which use different inlet and exhaust valve guides, UAJ1009 is used for both inlet and exhaust valve positions on later engine variants. It is precision manufactured to provide accurate valve alignment, helping maintain correct valve operation and prolong engine life.

At Tractor Spare Parts Ltd, we also offer a professional BMC and Leyland cylinder head reconditioning service. If you would like your cylinder head rebuilt by our experienced team, please contact us for further information.

Important Information

• Suitable for both inlet and exhaust valves
• Fitted to later Leyland 4/98 and 6/98 engines
• Replaces the earlier separate valve guide arrangement used on previous engines.

Engine change points are as follows:

• 4/98 DT – Engines after serial number 13805
• 4/98 NT – Engines after serial number 83028
• 4/98 TT – Engines after serial number 2141
• 6/98 NT – Change point not available – please check before ordering
• 6/98 TT – Change point not available – please check before ordering

If you are unsure which valve guide your engine requires, please contact us with your engine serial number before ordering.

Technical Specification

• Overall length: 85.10mm (3.35")

Fitted to the following engine models:

Leyland Engines

• Late Leyland 4/98 DT
• Late Leyland 4/98 NT
• Late Leyland 4/98 TT
• Late Leyland 6/98 NT
• Late Leyland 6/98 TT

Marshall Tractors

Fitted to Marshall tractors equipped with the above later Leyland engines.

Associated Parts

Earlier engines use separate valve guides:

• 86K144 – Inlet valve guide (early engines)
• 86K145 – Exhaust valve guide (early engines)

Features

• Quality replacement valve guide
• Used for both inlet and exhaust valves
• Correct 85.10mm overall length
• Precision manufactured for accurate valve alignment
• Ideal for cylinder head repairs, engine rebuilds and restoration projects

Additional Information

Later versions of the Leyland 4/98 and 6/98 engines were redesigned to use a single valve guide for both the inlet and exhaust valves, simplifying cylinder head servicing compared with earlier engines.

Valve guides naturally wear over time, allowing excessive valve movement that can affect engine performance and valve sealing. Replacing worn guides during a cylinder head overhaul helps restore correct valve operation and improve engine reliability.

Ideal for customers searching for UAJ1009 valve guide, Leyland 4/98 valve guide, Leyland 6/98 valve guide, inlet and exhaust valve guide, Marshall valve guide, cylinder head valve guide and vintage tractor engine parts.

We specialise in quality parts for Nuffield, Leyland and Marshall tractors and aim to supply reliable tractor spare parts that fit correctly and perform reliably.