Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 575
INSTALLATION
(1) Install rocker arm on the shaft in there origi-
nal position (Fig. 9).
(2) Install hydraulic lash adjusters making sure
that adjusters are at least partially full of oil. This is
indicated by little or no plunger travel when the lash
adjuster is depressed.
(3) Install rocker arm shaft assembly tighten in se-
quence shown in (Fig. 10).
(4) Install valve cover as previously outlined.
VALVE SPRINGS AND VALVE STEM SEALS
VALVE SERVICE
• CYLINDER HEAD MUST BE REMOVED TO
SERVICE VALVE SPRINGS AND VALVE STEM
SEALS.
VALVES AND VALVE SPRINGS
REMOVAL
(1) With cylinder head removed, compress valve
springs
using
Valve
Spring
Compressor
Tool
C-3422-B with adopters 6537 and 6526 (Fig. 11).
(2) Remove valve retaining locks, valve spring re-
tainers, valve stem seals and valve springs.
(3) Before removing valves, remove any burrs
from valve stem lock grooves to prevent damage
to the valve guides. Identify valves to insure instal-
lation in original location.
VALVE INSPECTION
(1) Clean valves thoroughly and discard burned,
warped and cracked valves.
(2) Measure valve stems for wear. Refer to (Fig. 14)
for specifications.
(3) Remove carbon and varnish deposits from inside
of valve guides with a reliable guide cleaner.
VALVE GUIDES
Measure valve guides in 3 places top, middle and
bottom (Fig. 13). Using a small hole gauge and a
micrometer, refer to (Fig. 12) for specifications.
Replace cylinder head if guides are not within
specifications.
TESTING VALVE SPRINGS
(1) Refer to Testing Valve previously described in
this Group for procedure. Test springs at 36.8 mm
(1-7/16 to 1-15/32 in.) 1000 N (225 lbs.)
6 40 N (9 lbs.).
Discard the springs that do not meet specifications.
(2) Inspect each valve spring for squareness with a
steel square and surface plate, test springs from both
ends. If the spring is more than 1.65mm (1/16 inch) out
of square, install a new spring. Spring free length is
53.2 mm
6.25 mm (2.094 in. 6.010 in.)
Fig. 9 Intake and Exhaust Rocker Arm Assemblies
Fig. 10 Rocker Arm Shaft—Installation
Fig. 11 Valve Spring Compressor
Fig. 12 Valve Guide Specification
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2.2/2.5L ENGINE
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REFACING VALVES AND VALVE SEATS
(1) The intake and exhaust valve seats and valve
face have a 45 degree angle.
(2) Inspect the remaining margin after the valves
are refaced (Fig. 11). Exhaust valves with less than
1.07mm (3/64 inch) margin and intake valves with
less than 1.06mm (3/64 inch) margin should be dis-
carded.
(3) 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 ob-
tained.
(4) Measure the concentricity of valve seat using a
valve seat dial indicator. Total runout should not ex-
ceed. 0.1 mm (.004 inch) (total indicator reading).
(5) Inspect the valve seat with Prussian blue to de-
termine where the valve contacts the seat. To do
this,coat valve seat 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 trans-
ferred to top edge of the valve face, lower valve seat
with a 15 degrees stone. If the blue is transferred to
the bottom edge of valve face raise valve seat with a
65 degrees stone.
• Intake valve seat diameter 34.0mm (1.338 inch)
• Exhaust valve seat diameter 29.4mm (1.157 inch)
Valve seats which are worn or burned can be re-
worked, provided that correct angle and seat width
are maintained. Otherwise cylinder head must be re-
placed.
(6) When seat is properly positioned the width of
intake seats should be 1.87mm (0.73 inch) The width
of the exhaust seats should be 2.00mm (.078 inch)
(Fig. 16 Dimension 1).
(7) Check valve tip to spring seat dimensions A af-
ter grinding the valve seats or faces. Grind valve tip
to give 55.62 to 55.88 mm (2.190 to 2.200 inch.) over
spring seat when installed in the head (Fig. 17).
Check valve tip for scoring, if necessary, the tip
chamfer should be reground to prevent seal damage
when the valve is installed.
(8) Check the valve spring installed height B after
refacing the valve and seat (Fig. 17). Measurement B
is to be taken from the spring seat to the bottom of
the spring retainer. Correct height is 44.0mm (1.73
inches).
Fig. 13 Measuring Valve Guides
Fig. 14 Valve Dimensions
Fig. 15 Refacing Intake and Exhaust Valves
Fig. 16 Refacing Valve Seats
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2.2/2.5L ENGINE
9 - 39
VALVE GEAR REASSEMBLY AFTER VALVE
SERVICE
(1) Coat valve stems with lubrication oil and insert
in cylinder head.
(2) Install new valve stem seals on all valves. The
valve stem seals should be pushed firmly and
squarely over valve guide. The lower edge of the seal
should be resting on the valve guide boss.
(3) Install valve spring seats and springs and re-
tainers. Compress valve springs only enough to in-
stall locks, taking care not to misalign the direction
of compression. Nicked valve stems may result from
misalignment of the valve spring compressor.
CAUTION: When depressing the valve spring retain-
ers with Valve Spring Compressor Tool C-3422-B
with adopters 6537 and 6526 (Fig. 11) the locks can
become dislocated. Check to make sure both locks
are in their correct location after removing tool.
(4) Check installed height of springs. Measurement
B is to be taken from the spring seat to the bottom of
the spring retainer. Correct height is 44.0mm (1.73
inches). If seats have been ground an additional
spring seat may be required to maintain correct in-
stalled spring height (Fig. 17).
(5) Install camshaft and rocker arms as previously
described, see Camshaft-Install.
Fig. 17 Checking Valve Tip Height and Spring
Installed Height
9 - 40
2.2/2.5L ENGINE
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CRANKSHAFT, INTERMEDIATE AND BALANCE SHAFT SERVICE
Fig. 1 Crankshaft Intermediate and Balance Shaft Assemblies and Oil Seals
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2.2/2.5L ENGINE
9 - 41
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