Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 585
install the new cam plug to a depth of 0.5mm (0.020
inch) below the surface of the cylinder head.
(6) Replace air cleaner assembly.
CAMSHAFT END SEAL (PLUG) SERVICE —
OUT OF VEHICLE SERVICE
Install end seal plug with Special Tool MD998306.
(Fig. 13).
CYLINDER HEAD
REMOVAL
(1) See Timing System this group for disassembly
and remove camshaft sprockets.
Fig. 10 Assemble Rocker Arm and Shafts
Fig. 11 Distributor Drive
Fig. 12 Install Camshaft Oil Seal
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(2) See Camshaft Rocker Arms Removal.
(3) Remove upper intake manifold assembly. Refer
to Intake and Exhaust Manifolds, Group 11.
(4) Remove distributor.
(5) Remove exhaust manifolds and cross over Refer
to Intake and Exhaust Manifolds, Group 11.
(6) Remove cylinder head bolts in sequence shown
in (Fig. 14) and remove cylinder head.
INSPECTION
(1) Before cleaning, check for leaks, damage and
cracks.
(2) Clean cylinder head and oil passages.
(3) Check cylinder head for flatness (Fig. 15).
(4) Cylinder head must be flat within;
• Standard dimension = less than 0.05mm (.002
inch)
• Service Limit = 0.2mm (.008 inch)
• Grinding Limit = Maximum of 0.2 mm (.008 inch)
is permitted.
CAUTION: This is a combined total dimension of
stock removal from cylinder head if any and block
top surface.
Fig. 13 Install Camshaft End Seal—Plug
Fig. 14 Cylinder Head Bolt Removal Sequence
Fig. 15 Check Cylinder Head
Fig. 16 Cylinder Head Bolt Tightening Sequence
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INSTALLATION
(1) Clean surfaces of head and block, install head
gasket over locating dowels.
(2) Install head on locating dowels.
(3) Install 10mm allen hex head bolts with wash-
ers.
(4) Tighten bolts in the order shown in (Fig. 16).
When tightening the cylinder head bolts, tighten
gradually, working in two or three steps and finally
tighten to specified torque of 108 N
Im (80 ft. lbs.).
VALVE SERVICE
VALVE AND VALVE SPRINGS
(1) With suitable valve spring compressor, remove
spring retainer locks, retainer, valve spring, spring
seat and valve (Fig. 17).
(2) Remove valve stem seals with suitable tool
(Fig. 18). Do not reuse valve stem seals.
VALVES
(1) Check valve stem tip for pitting or depression
at point A (Fig. 19).
(2) Check for wear and ridge wear at Point B.
(3) Check for even contact (at face center) with
valve seat, Point C.
(4) Check margin. Replace valve if margin is out of
specification (Fig. 20).
(5) Check valve guide height (Fig. 20).
(6) Measure valve stem to guide clearance. Refer
to specification (Fig. 21).
(7) Measure Valve spring free length and square-
ness (Fig. 22). Refer to (Fig. 21) for specifications.
VALVE SEAT INSPECTION
Inspect the valve seat with Prussian blue to deter-
mine 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 pres-
sure. 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
15 degrees stone. If the blue is transferred to the bot-
tom edge of valve face raise valve seat with a 65 de-
gree stone.
(1) Install valve spring seat.
Fig. 17 Remove Valves
Fig. 18 Remove Valve Stem Seals
Fig. 19 Valve Inspection
Fig. 20 Valve Guide Height
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(2) Using suitable tool install seal by tapping
lightly until seal is in place. (Fig. 24).
(3) Install valve spring with the enamelled ends
facing the rocker arms (Fig. 25).
CAUTION: During reassembly, compressing the
valve spring more than necessary to install valve
spring retainer locks can cause the retainer to be
forced against the stem seal and damaging it.
Fig. 21 Valve Specification
Fig. 22 Valve Spring
Fig. 23 Valve Seat Reconditioning
Fig. 24 Install Valve Stem Seals
Fig. 25 Installed Valve Spring Position
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