Removal - Dodge Intrepid Service Manual

9 - 32 ENGINE 2.7L
INTAKE/EXHAUST VALVES & SEATS (Continued)
VALVES
Inspect the remaining margin after the valves are
refaced. (Refer to 9 - ENGINE - SPECIFICATIONS)
VALVE SEATS
(1) When refacing valve seats, it is important that
the correct size valve guide pilot be used for reseat-
ing stones. A true and complete surface must be
obtained.
(2) Measure the concentricity of valve seat using
dial indicator. Total runout should not exceed 0.051
mm (0.002 inch.) total indicator reading.
Fig. 28 Valve Face and Seat
1 - SEAT WIDTH
2 - FACE ANGLE
3 - SEAT ANGLE
4 - SEAT CONTACT AREA
(3) Inspect the valve seat with Prussian blue to
determine where the valve contacts the seat. To do
this, coat valve seat LIGHTLYwith 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 trans-
ferred to top edge of valve face, then lower valve seat
with a 15 degree stone. If the blue is transferred to
the bottom edge of valve face, then raise valve seat
with a 65 degree stone.
NOTE: Valve seats which are worn or burned can
be reworked, provided that correct angle and seat
width are maintained. Otherwise cylinder head must
be replaced.
(4) When seat is properly positioned the width of
the intake 1.00 to 1.50 mm (0.0394 to 0.0591 in.) and
exhaust seats should be 1.25 to 1.75 mm (0.049 to
0.069 in.) (Fig. 28).
(5) Check the valve spring installed height after
refacing the valve and seat (Fig. 29).
VALVE AND SPRING INSTALLED HEIGHT
(1) Coat valve stems with clean engine oil and
insert them in cylinder head.
(2) If valves or seats have been refaced, check
valve tip height (A) (Fig. 29). If valve tip height for
Fig. 29 Checking Valve Tip Height and Valve
1 - SPRING RETAINER
2 - GARTER SPRING
3 - VALVE SPRING SEAT TOP
4 - CYLINDER HEAD SURFACE
intake valve is greater than 47.59 (1.8737 in.) or
49.14 (1.9347 in.) for exhaust valve, grind valve tip
until within specifications. Make sure measurement
is taken from cylinder head surface to the top of
valve stem.
(3) Install valve seal/spring seat assembly over
valve guides on all valve stems (Fig. 30). Ensure that
the garter spring is intact around the top of the rub-
ber seal.
(4) Position valve springs and retainer on spring
seat (Fig. 30).
(5) Compress valve spring with a valve spring
compressor.
(6) Install retainer locks and release tool.
(7) If valves and/or seats are refaced, measure the
installed height of springs (B) (Fig. 29). Measure-
ment is taken from top of spring seat to the bottom
surface of spring retainer. If height is greater than
38.75 mm (1.5256 in.), install a 0.762 mm (0.030 in.)
spacer in head counterbore under the valve spring
seat to bring spring height back within specification.

REMOVAL

(1) Remove cylinder
ENGINE/CYLINDER HEAD - REMOVAL)
(2) Remove valve spring. (Refer to 9 - ENGINE/
CYLINDER HEAD/VALVE SPRINGS - REMOVAL)
(3) Before removing valves, remove any burrs
from valve stem lock grooves to prevent dam-
age to the valve guides.
(4) Remove valve. Identify each valve to ensure
installation in original location.
head(s). (Refer to
LH
9 -