Valve Clearance; Measurement Of Valve Clearance - Kohler SFGLD480 Operation & Maintenance Manual

2. VALVE CLEARANCE

The valve clearance control allows assessment of wear on the contact points between valve and seat.
The operation is explained below.
Valve clearance: use the caliper to measure the distance between the upper disk face and the mechanized
upper face of the cylinder head.
Evaluation: the reference value is the initial measurement after 100 hours of operation of the cylinder head. If
this value increases over time by more than 1 mm, the wear should be carefully monitored. If this value
increases by more than 1.5 mm, it indicates excessive wear and the valve and seat should be replaced.
Maximum: Initial value + 1.5 mm
The guiding reference values of initial valve clearance are:
Engine / cylinder head
Gas FG/SFG/HGM240
Gas HGM420/HGM560
PRODUCT INFORMATION
IT-G-E-10-001e
ADJUSTMENT OF GAS AND ETHANOL ENGINE VALVES.
Valve clearance

Measurement of valve clearance

type
Diesel F/SF
INDEX
G
VALVE CLEARANCE
Initial reference valve clearance
(+0.3/-0.2) (mm)
Intake
52.90
52.1
43.6
5.2.44
DATE
August 2016
O&M_2.002211.810_A_10_2016
Exhaust
51.90
Dep. 2
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