Cummins 4BT – Cylinder Head – Disassembly

The following disassembly and assembly procedures are provided for inspection purposes only. Refer to the Shop
Manual, Bulletin No. 3810206, for complete rebuild in­ structions.
Mark the valves to identify their location.

Compress the valve spring and remove the valve stem collets. Remove the collets.

Release valve spring and remove the retainer spring.

Remove the remaining collets, retainers, springs and valves.
Keep the valves in a labeled rack for a correct match with companion seats while making measurements.

Remove the valve stem seals.