Chrysler New Yorker. Manual — part 210
ROCKER ARMS
REMOVAL
(1) Remove cylinder head cover(s) using procedure
outlined in this section.
CAUTION: Always rotate engine by turning the
crankshaft. Failure to do so will result in valve
and/or piston damage.
(2) Rotate engine until the cam lobe is on its base
circle (heel), on the rocker arm being removed.
CAUTION: Depress valve spring only enough to
remove rocker arm.
(3) Using Special Tools 8215 and 8216 Adaptor,
depress valve spring only enough to release tension
on rocker arm (Fig. 42).
(4) Remove rocker arm from cylinder head.
CAUTION: If rocker arms are to be reused, identify
position of rocker arms for reassembly in their orig-
inal positions.
(5) Repeat procedure for each rocker arm being
removed.
INSPECTION
Inspect the rocker arm for wear or damage (Fig.
43). Replace as necessary.
INSTALLATION
(1) Lubricate with rocker arms with clean engine
oil before installation.
(2) Rotate engine until cam lobe is on its base cir-
cle (heel) of rocker arm being installed.
(3) Using Special Tools 8215 and 8216 Adaptor,
depress valve spring only enough to install rocker
arm (Fig. 42).
(4) Install rocker arm in original position (if
reused) over valve and lash adjuster. Release tension
on valve spring.
NOTE:
Inspect rocker arm for proper engagement
into lash adjuster and valve tip.
(5) Repeat procedure for each rocker arm being
installed.
(6) Install cylinder head cover(s) using procedure
outlined in this section.
HYDRAULIC LASH ADJUSTER
REMOVAL
(1) Remove cylinder head cover(s). Refer to proce-
dure outlined in this section.
(2) Remove rocker arm(s). Refer to procedure out-
lined in this section.
CAUTION: If lash adjusters and rocker arms are to
be reused, always mark position for reassembly in
their original positions.
(3) Remove lash adjuster(s).
INSTALLATION
(1) Install hydraulic lash adjuster making sure
adjusters are at least partially full of oil. This can be
verified by little or no plunger travel when lash
adjuster is depressed.
(2) Install rocker arm(s). Refer to procedure out-
lined in this section.
(3) Install cylinder head cover(s).
VALVE STEM SEALS OR VALVE SPRINGS—IN
VEHICLE
REMOVAL
(1) Perform fuel system pressure release procedure
before attempting any repairs. Refer to Group 14,
Fuel System for procedure.
(2) Disconnect negative cable from remote jumper
terminal.
Fig. 42 Rocker Arm—Removal/Installation
Fig. 43 Rocker Arm
LH
2.7L ENGINE
9 - 35
REMOVAL AND INSTALLATION (Continued)
(3) Remove air cleaner housing cover and inlet
hose.
(4) Remove intake manifold plenum. Refer to
Group 11, Exhaust System and Intake Manifold for
procedure.
(5) Remove cylinder head cover(s).
(6) Remove crankshaft damper, timing chain cover,
and timing chain. Refer to procedure outlined in this
section.
(7) Remove camshafts. Refer to procedure outlined
in this section.
(8) With air hose attached to spark plug adapter
installed in the cylinder being serviced, apply 620.5 –
689 kPa (90 – 100 psi) air pressure. This is to hold
valves in place while servicing components.
(9) Using Special Tool MD 998772A with adapter
6779, compress valve spring and remove valve locks,
retainer, and valve spring.
(10) Remove valve stem seals by using a valve seal
tool (Fig. 44).
INSTALLATION
(1) The valve stem seal/valve spring seat should be
pushed firmly and squarely over the valve guide
using the valve stem as guide. Do Not Force seal
against top of guide. When installing the valve
retainer locks, compress the spring only enough to
install locks
(2) Follow the same procedure on the remaining 5
cylinders using the firing sequence 1-2-3-4-5-6. Make
sure piston is at TDC on the cylinder that the
valve spring is to be removed.
(3) Remove spark plug adapter tool.
(4) Remove Special Tool MD 998772A and install
rocker arm(s). Refer to procedure outlined in this sec-
tion.
(5) Install camshafts, timing chain, and timing
chain cover.
(6) Install cylinder head cover. and intake mani-
fold.
(7) Install intake manifold plenum. Refer to Group
11, Exhaust System and Intake Manifold.
(8) Connect negative cable.
CYLINDER HEAD
REMOVAL
(1) Perform fuel pressure release procedure before
attempting any repairs. Refer to Group 14, Fuel
System for procedure.
(2) Disconnect negative cable from remote jumper
terminal.
(3) Drain cooling system and remove A/C and
accessory drive belts. Refer to Group 07, Cooling Sys-
tem.
(4) Remove crankshaft damper.
(5) Remove intake plenum and lower intake mani-
fold. Refer to Group 11, Exhaust and Intake Manifold
for procedure.
(6) Remove cylinder head cover and timing chain
cover. Refer to procedure outlined in this section.
(7) Remove water outlet connector (Fig. 45). Refer
to Group 07, Cooling System for procedure.
(8) Rotate crankshaft until crankshaft sprocket
timing mark aligns with timing mark on oil pump
housing.
(9) Remove primary timing chain. Refer to proce-
dure outlined in this section.
(10) Remove camshaft bearing caps gradually in
reverse sequence of installation (Fig. 48).
(11) Remove camshafts from cylinder head.
CAUTION: Ensure cylinder head bolts 11 – 9 (Fig.
47) are removed before attempting the removal of
cylinder head, as damage to cylinder head and/or
block may occur.
Fig. 44 Valve Stem Seal—Removal
Fig. 45 Water Outlet Connector
9 - 36
2.7L ENGINE
LH
REMOVAL AND INSTALLATION (Continued)
(12) Remove
cylinder
head
bolts
in
reverse
sequence of installation (Fig. 47) starting with bolts
11 – 9, then bolts 8 – 1.
(13) Remove cylinder head(s).
INSTALLATION
NOTE: The cylinder head bolts are tightened using
a torque plus angle procedure. The bolts must be
examined BEFORE reuse. If the threads are necked
down the bolts should be replaced (Fig. 46)
Necking can be checked by holding a straight edge
against the threads. If all the threads do not contact
the scale, the bolt should be replaced (Fig. 46)
CAUTION: When cleaning cylinder head and cylin-
der block surfaces, DO NOT use a metal scraper
because the surfaces could be cut or ground. Use
ONLY a wooden or plastic scraper.
(1) Clean sealing surfaces of cylinder head and
block.
(2) Install new head gasket over locating dowels.
(3) Install cylinder head to block, assuring head is
properly positioned over locating dowels.
(4) Lubricate bolt threads with clean engine oil
and install bolts.
(5) Tighten bolts in sequence shown in (Fig. 47),
using the following steps and torque values:
• Step 1: Bolts 1 – 8 to 48 N·m (35 ft. lbs.)
• Step 2: Bolts 1 – 8 to 75 N·m (55 ft. lbs.)
• Step 3: Bolts 1 – 8 to 75 N·m (55 ft. lbs.)
• Step 4: Bolts 1 – 8 to +90° Turn Do not use a
torque wrench for this step.
• Step 5: Bolts 9 – 11 to 28 N·m (250 in. lbs.)
(6) Install camshafts. Refer to procedure outlined
in the section.
(7) Install timing chain and sprockets. Refer to
procedure outlined in this section.
(8) Install water outlet connector (Fig. 45). Refer
to Group 07, Cooling System for procedure.
(9) Install cylinder head covers. Refer to procedure
outlined in this section.
(10) Install timing chain cover and crankshaft
damper. Refer to procedure outlined in this section.
(11) Install lower intake manifold and intake ple-
num. Refer to Group 11, Exhaust System and Intake
Manifold.
(12) Install A/C and accessory drive belts. Refer to
Group 07, Cooling System.
(13) Fill cooling system. Refer to Group 07, Cooling
System.
(14) Connect negative cable to remote jumper ter-
minal.
VALVE AND VALVE SPRINGS
REMOVAL
(1) With cylinder head removed, compress valve
springs using a Special Tool C-3422-B, Valve Spring
Compressor.
(2) Remove valve retaining locks, valve spring
retainers, valve springs and valve spring seat/stem
seal assembly.
(3) Before removing valves, remove any burrs
from valve stem lock grooves to prevent dam-
Fig. 46 Checking Cylinder Head Bolts for Stretching
(Necking)
Fig. 47 Cylinder Head Tightening Sequence
Fig. 48 Camshaft Bearing Cap Tightening Sequence
LH
2.7L ENGINE
9 - 37
REMOVAL AND INSTALLATION (Continued)
age to the valve guides. Identify valves to insure
installation in original location.
INSTALLATION
(1) Coat valve stems with clean engine oil and
insert them in cylinder head.
(2) If valves or seats have been reground, check
valve tip height (A) (Fig. 49). If valve tip height for
intake valve is greater than 47.59 mm (1.8737 in.) or
49.14 mm (1.9347 in.) for exhaust valve, grind valve
tip until within specifications. Make sure measure-
ment 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. 50). Ensure that
the garter spring is intact around the top of the rub-
ber seal. Install valve springs, valve retainers.
(4) Compress valve springs with a valve spring
compressor install locks and release tool. If valves
and/or
seats
are
reground,
measure
the
installed height of springs (B) (Fig. 49), make
sure measurements are taken from top of
spring seat to the bottom surface of spring
retainer. If height is greater than 38.75 mm (1.5256
inches), install a 0.762 mm (0.030 inch.) spacer in
head counterbore under the valve spring seat to
bring spring height back within specification.
TIMING CHAIN COVER
REMOVAL
(1) Disconnect negative cable from remote jumper
terminal at right strut tower.
(2) Remove upper radiator support crossmember.
Refer to Group 23, Body for procedures.
(3) Remove fan module, A/C, and accessory drive
belts. Refer to Group 07, Cooling System for proce-
dure.
(4) Remove crankshaft damper. Refer to procedure
outlined in this section.
(5) Remove power steering pump from mounting
bracket.
(6) Remove accessory drive belt tensioner pulley
and bracket.
(7) Remove timing chain cover attaching bolts and
remove cover (Fig. 51).
INSTALLATION
(1) Inspect and clean sealing surfaces. Inspect and
replace gasket and seal as necessary.
Fig. 49 Valve Tip Height and Valve Spring Installed
Height Checking
Fig. 50 Valve, Spring, and Valve Stem Seal
Fig. 51 Timing Chain Cover—Removal and
Installation
ITEM
DESCRIPTION
TORQUE
1
Bolt—M10
54 N·m (40 ft. lbs.)
2
Bolt—M10
54 N·m (40 ft. lbs.)
3
Bolt—M6
12 N·m (105 in. lbs.)
9 - 38
2.7L ENGINE
LH
REMOVAL AND INSTALLATION (Continued)
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