3-54 ENGINE
• Remove the valve spring seat.
• Remove the valve from the combustion chamber side.
• Remove the oil seal.
CYLINDER HEAD DISTORTION
Decarbonize the combustion chambers.
Check the gasket surface of the cylinder head for distortion. Use
a straightedge and thickness gauge. Take clearance readings at
several places. If readings exceed the service limit, replace the
cylinder head.
" 09900-20803: Thickness gauge
# Cylinder head distortion
Service Limit: 0.2 mm (0.008 in)
VALVE STEM RUNOUT
Support the valve using V-blocks, as shown, and check its runout
using the dial gauge.
If the runout exceeds the service limit, replace the valve.
" 09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
# Valve stem runout
Service Limit: 0.05 mm (0.002 in)
VALVE HEAD RADIAL RUNOUT
Place the dial gauge at a right angle to the valve head face and
measure the valve head radial runout.
If it measures more than the service limit, replace the valve.
" 09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
# Valve head radial runout
Service Limit: 0.03 mm (0.001 in)
To Next Page
Loading...
Need help?
General
