Mitsubishi Eclipse 1990 Service Manual page 243

Intake 111.49-111.99 mm (4.389-4.499 in.)
Exhaust
Stem Diameter
Intake 5.934-5.952 mm
Exhaust
Valve Margin
Intake 1.285-1.615 mm
Exhaust
(3) When refacing valve seats, it is important that the correct
size valve guide pilot be used for reseating
true and complete surface must
Measure the concentricity of valve seat using a valve
seat dial indicator. Circular
Limit:
0.05 mm
(5) Inspect the valve seat with Prussian blue to determine
where the valve contacts the seat.
To do this, coat valve face LIGHTLY with Prussian blue
then set valve in place. Rotate the valve with light pressure.
If the blue is transferred to the center of valve face, contact
is satisfactory. If the blue is transferred to top edge of
the valve face, lower valve seat with a
If the blue is transferred to the bottom edge of valve
face raise valve seat with a 65 degree stone.
Intake valve seat diameter
34.50 mm (1.358 in.)
Exhaust valve seat diameter
29.50 mm (1.161 in.)
Valve seats which are worn or burned can be reworked
if correct angle and seat width are maintained. Otherwise,
cylinder head must be replaced.
Revision
(Overall)
mm
mm
mm
should not exceed.
in.) Indicator reading.
in.)
in.)
in.)
in.)
in.)
A
degree stone.
15