Remove Cylinder Heads and Hydraulic Lifters
1. Remove nuts and washers securing each cylinder
head. Discard nuts and washers once removed. Do
not reuse. Studs (if present) should only be removed
if damaged or if cylinder reconditioning is necessary.
Once removed, they must be replaced.
2. Mark location of push rods as either intake or
exhaust and cylinder 1 or 2. Push rods should
always be reinstalled in same positions.
3. Carefully remove push rods, cylinder heads, and
head gaskets.
4. Remove lifters from lifter bores. Use a hydraulic lifter
tool. Do not use a magnet to remove lifters. Mark
lifters by location, as either intake or exhaust, and
cylinder 1 or 2. Hydraulic lifters should always be
reinstalled in same position.
Inspection
Check base surface of hydraulic lifters for wear or
damage. If lifters need to be replaced, apply a liberal
coating of Kohler lubricant (see Tools and Aids) to base
of each new lifter before it is installed.
Bleeding Lifters Style A (Ribbed)
To prevent a possible bent push rod or broken rocker
arm, it is important to bleed any excess oil out of lifters
before they are installed.
1. Cut a 50-75 mm (2-3 in.) piece from end of an old
push rod and chuck it in a drill press.
2. Lay a rag or shop towel on table of drill press and
place lifter, open end up, on towel.
3. Lower chucked push rod until it contacts plunger in
lifter. Slowly pump plunger 2 or 3 times to force oil
out of feed hole in side of lifter.
Bleeding Lifters Style B (Smooth)
To prevent a possible bent push rod or broken rocker
arm, it is important to bleed any excess oil out of lifters
before they are installed.
1. Lay a rag or shop towel on table of drill press. Place
an 8 mm (5/16 in.) socket on towel with well end up,
then place open end of lifter on socket. Ensure
socket does not contact lifter ball surface.
2. Place some material, such as wood, plastic, or
aluminum, on top of lifter to protect lifter fi nish.
3. Lower drill press chuck until it contacts material on
lifter. Slowly pump lifter 2 or 3 times to force oil out of
feed hole in side of lifter.
Disassemble Cylinder Heads
NOTE:
These engines use valve stem seals on intake
and exhaust valves. Use a new seal whenever
valve is removed or if seal is deteriorated or
damaged in any way. Never reuse an old seal.
1. Remove screws, rocker arm pivots and rocker arms
from cylinder head. Note screw color for reassembly.
2. Compress valve springs using a valve spring
compressor.
3. Once valve spring is compressed, remove valve
spring keepers, then remove following items.
● Valve spring retainers
● Valve springs
● Valve spring caps
● Intake and exhaust valve (mark position)
● Valve stem seals (intake and exhaust)
4. Repeat above procedure for other cylinder head. Do
not interchange parts from one cylinder head to
other.
Disassembly/Inspection and Service
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24 690 31 Rev. D
KohlerEngines.com
