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(b)Install a new guide into the cylinder
head by pushing it with an arbor press
from the upper side of the head until the
specified height to the top of the guide
is obtained.
(c)Insert a new valve into the guide and
make sure the valve slides in the guide
freely.
(d)After the valve guide has been replaced,
check the valve contact with its seat.
(4)Valves
(a)Put a small amount of Prussian blue or
read lead on the valve face. Hold the
valve with a valve lapping tool(com-
mercially available)and press it against
the seat to check its contact.
(b)The width of contact must be uniform all
the way around both seat and valve. If
the contact is bad, reface the valve and
seat.
(c)If the valve margin(valve lip thickness)
exceeds the limit, replace the valve.
Unit:mm(in.)
Item Standard Limit
Valve margin 1.0(0.039) 0.5(0.020)
(lip thickness)
(d)If the valve sinkage(the dimension from
the top of a closed valve to the face of
cylinder head)exceeds the limit, recon-
dition the valve seat or replace the
cylinder head assembly.
Unit:mm(in.)
Item Standard Limit
Valve sinkage
(dimension from 0.05 0.25 1.5
top of closed (0.020 0.0098) (0.059)
valve to face
of head)
(5)Valve refacing
(a)Set the valve refacer at an angle of 45
and grind the valve.