NOTE: In order to remove the valve springs with the cylinder head installed, the piston of the cylinder being
worked on must be brought to top dead center (TDC) to support the valves.
Use barring tool, Part Number 3824591, to rotate the piston to the TDC of the cylinder being worked on.
TDC can be determined by the following method:
Align the vibration damper/crankshaft speed indicator ring so that the TDC mark is at the 12-o’clock position. If both
Number 1 cylinder rocker levers are loose, move to the following steps. If both Number 1 cylinder rocker levers
are not loose, rotate the crankshaft 360 degrees.
With the vibration damper/crankshaft speed indicator ring at TDC for the Number 1 cylinder, mark the damper for the
location of TDC for the other cylinders.
• Mark the vibration damper every 120 degrees with a marker directly on the damper or apply a piece of masking tape around the damper to mark.
• Mark the damper with the TDC indicator for each cylinder as shown. Two cylinders will correspond to each 120 degree line.
• Mark the damper with the TDC indicator for each cylinder as shown. Two cylinders will correspond to each 120 degree line.
Service Tip: A protractor, camshaft degree wheel, or angle/level indicator, Part Number 3375855, can be used
to locate 120 degree increments around the vibration damper/crankshaft speed indicator ring.
Remove all of the rocker levers. Refer to Procedure 003-008 in Section 3.
Remove all of the crossheads.Refer to Procedure 002-001 in Section 2.
Remove all of the injectors. Refer to Procedure 006-026 in Section 6.
Use the valve spring compressor, Part Number 3164329, to compress the valve springs.
Position the replacer screw (4) above the injector bore and install the two capscrews (5) in the cylinder head where
the hold-down clamp screws were removed.
Tighten the capscrews (5).
Torque Value: 5 N•m [ 44 in-lb ]
NOTE: The valves are not evenly spaced from the injector bore. It is important to align the slots in the valve spring
compressor plate with the valve springs.
Apply anti-seize compound to the replacer screw (4) threads. Always read and follow label precautions.
Position the valve spring compressor plate (1) on the replacer screw (4) and align the slots in the valve spring compressor plate with the valve springs.
Install the washer (3) and nut (2) on the replacer screw (4).
Turn the nut (2) clockwise to compress the valve springs.
Continue turning the nut (2) clockwise until the valve collets can be removed using a magnetic tool, such as the
end of a magnetic screwdriver.
NOTE: Because there is a gap between the top of the piston and the valve face, it may be necessary to use a second magnet to hold the valve stem up to remove the valve collets.
Remove the valve collets and the valve spring compressor service tool.
Remove the four valve spring retainers and the valve springs.
NOTE: Prior to removing the valve stems seals, note the color of the valve stem seal installed at each valve
location. The same color valve stem seal must be installed when assembling the cylinder head.
There are two colors of valve stem seals used:
“Top Hat” Seal Colors Used:
– Green (exhaust valves)
– Yellow (intake and exhaust valves).
Use boot pliers, Part Number 3163293, to remove the valve stem seals.
NOTE: The valve stem seals can be installed by hand. The installation tool will aid with installing the valve stem seals, but is not mandatory.
Note the color and location of the seal, then discard the old seal.
