Mitsubishi Eclipse 1990, Service Manual

Page: 349 / 2103

ENGINE OVERHAUL
Cylinder Head and Valves
Removal installation
Press
A
Press
A
Push rod
Valve
guide
Push rod
Valve
guide
(2) Rebore the valve seat hole in the
a
selected oversize valve seat diameter.
Intake seat ring hole diameters’
0.3 mm in.)
0.6 mm (1.3622-1.3634 in.)
Exhaust seat ring hole
0.3 mm in.)
0.6 O.S. mm in.)
(3) Before fitting the valve seat, either heat the cylinder head
up to approximately
or
cool the valve seat
in liquid nitrogen, to prevent the cylinder head bore from
galling.
(4)
Using a valve seat cutter, correct the valve seat to the
specified width and angle.
See SEAT
RECONDITIONING
PROCEDURE”.
VALVE GUIDE REPLACEMENT PROCEDURE
(1) Using the push rod and a press, remove the valve guide
toward cylinder head gasket surface.
(2) Rebore valve guide hole to the new oversize valve guide
outside diameter.
Valve guide hole diameters
0.05
0.25 O.S.
mm
0.50
11.25-11.27 mm in.)
mm in.)
NOTE
Do not install a valve guide of the same size
(3) Using the special tool, press-fit the guide, working
from the cylinder head top surface.
(4) After installing valve guides, insert new valves in them
to check for sliding condition.
(5) When valve guides have been, replaced, check for valve
contact
and correct valve seats as
TSB Revision