Caution: Do not pressure test the cylinder head with the valves and the valve springs installed. If the cylinder
head is assembled, the valve guides and the valve stems can be damaged because they cannot be dried thoroughly.
Remove the valves and the valve springs as follows:
1. Use valve spring compressor stand, Part No. ST-1022, and valve spring compressor plate, Part No. ST-1026.
2. Mark each valve as it is removed to identify its location in the cylinder head.
Install two injector sleeve holding tools, Part No. ST-1179, in each cylinder head.
Tighten the injector sleeve holding tool capscrew.
Torque Value:
5 N•m [45 in-lb]
10 N•m [90 in-lb]
15 N•m [130 in-lb]
Install the cylinder head in a hydrostatic tester, Part No. ST-1012, and a hydrostatic tester adapter plate, Part No. ST-1013.
Connect a regulated air supply hose to the test fixture plate.
Apply 275 kPa [40 psi] air pressure.
Use a hoist to put the cylinder head in a tank of warm water heated to 60°C [140°F].
Completely submerge the cylinder head in the water.
Visually inspect for air bubbles rising from the water.
If air bubbles are seen, repair the leaking area.
Remove the test equipment.
Dry the cylinder head with compressed air.
Assemble the cylinder head. Refer to ‘‘Assembly’’ under Cylinder Head – Rebuild (02-02).
A. Valve
B. Valve Stem Seal
C. Valve Spring
D. Valve Spring Retainer
E. Collets
