Doosan DB33A - Valve Stem Oil Seal; Intake and Exhaust Valves

46
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Cylinder head assembly
<Disassembly steps>
1. Valve stem oil seal
2. Valve
3. Spring seat and spring
4. Spring retainer and cotter key
Important operation
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Valve stem oil seal (1)
Installer
Lubricate the oil seals and valve guides and install the
oil seals with an installer.
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Intake and exhaust valves (2)
1. Lubricate valve stems with engine oil.
2. Install the valves to the intake and exhaust guides.
Install the valves to their original lapped valve
seats.
Installer
(Valve face)
Small
Big
Intake valve
Exhaust valve
4
2
3
1