Maintenance
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For the disassembling of valve seat,
by welding the welding bead to a
valve seat rotating tool or valve seat,
pull it out with a special tool.
For the assembling of a new valve
seat, by putting it among the dry ices
of an ice box previously for about 2
hours for the cold shrinkage, and
press it in the cylinder head by a
special tool. (bench press)
Apply valve lapping compound to the
valve head seating face on the valve
seat and lap the valve seat by turning
it until it is seated in position, then
wipe out the lapping compound.
4) Valve spring
Visual check
Check the appearance of valve spring
and if necessary replace the spring.
Valve spring free length
Use a vernier caliper to measure the
valve spring free length.
If the measured value is less than the
specified limit, the valve spring must
be replaced.
EA3M2032
Valve seat
insert
Welding bead
Cylinder head
Spring free length Standard
Intake valve 64 mm
Exhaust
valve
Inner 60 mm
Outer 71 mm
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