NKJ202 CYLINDER HEAD GASKET (4/98 / 3.8 / 3.4).  Leyland 4/98 Cylinder Head Gasket.  Fitted to 4/98 DT/NT/TT engines in Leyland and Marshall tractors, JCB machinery and Thornycroft boats.

This gasket is also fitted to the last of the 3.8TD engines from engine number 40899 and 3.4TD from engine number 2443 onwards.

Cylinder head nut torque is 100 lb-ft (13.8 kg-m).
Click here to view a printable version of the cylinder head nut tightening and slackening sequence.

Please note that this gasket has 4 smaller holes that restrict water flow to the cylinder head, thereby keeping the cylinder block cooler.

Replaces part number: 86K623

See item numbered 27 in the illustration.

Fitted to tractors:

• Nuffield 4/65 (late models only, check engine number)
• Leyland 344, 384, 255, 270, 262, 272, 462, 472, 282, 482
• Leyland 602, 604, 702, 704, 802, 804
• Marshall 602, 604, 702, 704, 802, 804, 904XL
• JCB MK3 3D, 4D
• Thornycroft T230