Install the cylinder head in the cylinder head holding fixture, Part Number ST-583.
When installing the valve seat inserts, note that the exhaust and intake valve seat inserts are not the same.
Valve seat angle:
โข Intake 30-degrees
โข Exhaust 45-degrees.
If new valve seat inserts are installed, check valve depth and perform a valve leak test. See the Initial Check section
of this procedure.
If the valve seat inserts were removed in the Disassemble section, new inserts must be installed.
The insert chamfer (1) must be installed toward the bottom of the counterbore.
Use valve seat installer, Part Number 3165171, to drive the intake and exhaust valve seat inserts into the counterbore.
Use a dead blow hammer with the seat drivers to install the new valve seat inserts.
If new valve seat inserts were installed and/or the valve leakage was above specification, the valve seat/valve can
be lapped.
Lubricate the stems with SAE 15W-40 engine oil before installing the valves.
Use a fine lapping compound, Part Number 3375805, or equivalent. Apply a thin and even coating on the valve face.
Use a power or a hand suction lapping tool to provide pressure in the center of the valve.
Turn the valve backward and forward. Continue lapping until the compound shows a continuous contact pattern on both the valve seat insert and the valve.
Clean the lapping compound from the parts.
If lapping of the valves was required, measure the rim thickness to determine if there is enough rim material left.
If the valve rim thickness is not within the limits, a new valve must be used.
Lubricate the valve stems with clean SAE 15W-40 engine oil before installing the valves.
Install the valves.
NOTE: If the same valves as previously removed are to be used, make sure to install the valves in the same locations
from which the valves were removed.
If the cylinder head will not be used immediately, lubricate the valve stems with assembly lubricant, Part Number
3163087, or equivalent.
Install new valve stem seals of the same color as removed, and in the same locations.
There are two colors of valve stem seals used:
– Green (exhaust valves)
– Yellow (intake and exhaust valves)
Use a valve stem installation tool, Part Number 3164055, to install new valve stem seals.
The valve stem seals can be installed by hand. The installation tool will aid with installing the valve stem seals,
but is not mandatory.
Use hand pressure to keep the valves from falling out during installation.
Install the valve spring retainer and valve springs.
Compress the valve springs using the valve spring compressor service tool, Part Number 3164329.
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 Nโขm [ 44 in-lb ]
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 lubricant 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).
Compress the valve springs until the valve collets can be installed.
Install the valve collets.
Service Tip: Use Assembly Lube, Part Number 3163087, or equivalent, on the valve collets to help hold them in
place until the valve spring compressor is released.
Remove the valve spring compressor service tool, Part Number 3164329.
After assembly, hit the valve stems with a plastic hammer to make sure the collets are seated.
