Kohler Command PRO EFI ECH749 [146/180] Disassembly inspection and service

Cylinder Head Components

A Valve Cover B Valve Cover Gasket C Hex Flange Screw D Rocker Arm Pivot

E Rocker Arm F Push Rod G Hydraulic Lifter H Valve Cap

I Valve Keeper J Valve Spring K Valve Seal L

Valve Spring

Retainer

M Cylinder Head N

Cylinder Head

Gasket

O Valve P Dowel Pin

Remove Valve Covers

1. Remove screws securing each valve cover. Note valve cover diﬀ erences for proper location in reassembly.

Ensure any brackets and clips/clamps removed are reassembled in same location.

2. Covers should lift oﬀ without prying.

Remove Spark Plugs

Remove spark plug from each cylinder head.

Remove Cylinder Heads and Hydraulic Lifters

NOTE: Cylinder heads are retained using either screws or nuts and washers on studs. Do not interchange or mix

components.

1. Remove screws or nuts and washers securing each cylinder head. Discard screws or 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.

Disassembly/Inspection and Service

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