Disassembly/Inspection and Service Cylinder Head Components Remove Valve Covers 1. Remove screws from two lower valve cover mounting locations on each side. 2. Remove valve covers and valve cover gaskets. Note on which side oil fi ll or fuel pump is located, for correct reassembly later. 2. Remove push rods and mark their location as either intake or exhaust, and cylinder 1 or 2. Push rods should always be reinstalled in their original position. 3. Repeat for opposite cylinder. 4. Remove nuts and washers from cylinder head studs. Carefully remove cylinder heads and head gaskets. 5. Remove hydraulic lifters using a hydraulic lifter removing tool (do not use a magnet).
Mark them similar to push rods (intake or exhaust and cylinder 1 or 2). Hydraulic lifters should always be reinstalled in their original location. Hydraulic Lifters Inspection Check base surface of hydraulic lifters for wear or damage. If lifters need to be replaced, apply a liberal coating of Kohler lubricant to base of each new lifter before it is installed. Bleeding Lifters 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. Remove Spark Plugs Remove spark plugs from cylinder heads using a spark plug socket.
Remove Cylinder Heads and Valve Lifters NOTE: It is not necessary to remove cylinder studs from crankcase unless replacement is intended. If studs are removed for any reason, discard old stud(s), do not reuse/reinstall. Use new studs and refer to assembly sequence for proper installation. 1. Rotate crankshaft of engine until valves of one cylinder are closed. Loosen rocker arm screws until rocker arms can be pivoted to free push rods. 66 690 01 Rev.
C KohlerEngines.com 49 N M L D K C J B I H G F E A A Valve B Head C Hydraulic Lifter D Push Rods E Valve Stem Seal F Valve Spring Cap G Spring H Valve Spring Retainers I Valve Spring Keepers J Rocker Arms K Rocker Arm Pivot L Rocker Arm Screw M Valve Cover N Fuel Pump