Doosan DA40 - Dismantling; Renewing the valve stem seal

SHOP MANUAL
Engine
Ch 1 page 64
1. Remove collets, valve spring collars, springs and valves.
Press the spring down using tool 8406 in a press so that the
collets can be removed.
2. Mark and place the valves in a rack so that they can be
refitted in the same position in the cylinder head.
3. Mark the cylinder heads if more than one is removed at the
same time.
1. Remove the valve.
2. Remove the valve stem seal with a pair of pliers.
3. Fit the valve.
4. Tap in a new valve stem seal carefully using tool 8407 and a
hammer.
8406
Dismantling
8407
Renewing the valve stem seal
Figure 107
Figure 108
Figure 109