Valve Spring - DAELIM VJF125 Service Manual

CYLINDER HEAD / VALVES
10-6

VALVE SPRING

Measure the free length of valve spring.
Service Limit : 40.0mm
If any valve spring is shorter than the service
limit, it must be replaced as a set.
INTERVAL BETWEEN VALVE STEM AND VALVE GUIDE
Inspect each valve for bending, burning, scratches or
abnormal wear.
Check the operating condition using the valve guide.
Measure and record external diameter of valve stem.
SERVICE LIMIT : IN : 4.925 mm
EX: 4.905 mm
Insert the valve guide reamer from the combustion
chamber side and ream the guide to remove any
carbon build-up before measuring the guide.
Rotate the reamer clockwise during the installation
and removal of reamer.
Otherwise, it may cause the damage to the inside of
the guide.
TOOL : VALVE GUIDE REAMER
Measure and record each valve guide inner diameter.
SERVICE LIMIT : 5.030 mm
Measure the gap between valve stem and guide.
SERVICE LIMIT : IN : 0.080 mm
EX: 0.100 mm
Measure the inner diameter of the new valve guide. If
the clearance is not within the service limit, replace the
valve.