Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 482
(4) Remove camshaft sprockets and rear timing
belt cover (Refer to 9 - ENGINE/VALVE TIMING/
TIMING BELT / CHAIN COVER(S) - REMOVAL).
(5) Bearing
caps
are
identified
for
location.
Remove the outside bearing caps first (Fig. 21).
(6)
Loosen the camshaft bearing cap attaching
fasteners in sequence shown (Fig. 22) one camshaft
at a time.
CAUTION: Camshafts are not interchangeable. The
intake cam number 6 thrust bearing face spacing is
wider.
(7) Identify the camshafts before removing from
the head. The camshafts are not interchangeable.
(8) Remove camshafts from cylinder head.
NOTE: If removing rocker arms, identify for reinstal-
lation in the original position.
CLEANING
Clean camshaft with a suitable solvent.
INSPECTION
(1) Inspect camshaft bearing journals for damage
and binding (Fig. 23). If journals are binding, check
the cylinder head for damage. Also check cylinder
head oil holes for clogging.
(2) Check the cam lobe and bearing surfaces for
abnormal wear and damage. Replace camshaft if
defective.
NOTE: If camshaft is replaced due to lobe wear or
damage, always replace the rocker arms.
(3) Measure the lobe actual wear (unworn area -
wear zone = actual wear) (Fig. 23) and replace cam-
shaft if out of limit. Standard value is 0.0254 mm
(0.001 in.), wear limit is 0.254 mm (0.010 in.).
INSTALLATION
CAUTION: Ensure that NONE of the pistons are at
top dead center when installing the camshafts.
Fig. 20 Camshaft End Play - Typical
Fig. 21 Camshaft Bearing Cap Identification
Fig. 22 Camshaft Bearing Cap - Removal
1 - REMOVE OUTSIDE BEARING CAPS FIRST
Fig. 23 Checking Camshaft(s) for Wear
1 - UNWORN AREA
2 - ACTUAL WEAR
3 - BEARING JOURNAL
4 - LOBE
5 - WEAR ZONE
JR
ENGINE 2.0L DOHC
9 - 31
CAMSHAFT(S) (Continued)
(1) Lubricate all camshaft bearing journals, rocker
arms and camshaft lobes.
(2) Install all rocker arms in original positions, if
reused.
(3) Position camshafts on cylinder head bearing
journals. Install right and left camshaft bearing caps
No. 2 – 5 and right No. 6. Tighten M6 fasteners to 12
N·m (105 in. lbs.) in sequence shown in (Fig. 24).
(4) Apply Mopar
t Gasket Maker to No. 1 and No.
6 bearing caps (Fig. 25). Install bearing caps and
tighten M8 fasteners to 28 N·m (250 in. lbs.).
NOTE: Bearing end caps must be installed before
seals can be installed.
(5) Install
camshaft
oil
seals
(Refer
to
9
-
ENGINE/CYLINDER
HEAD/CAMSHAFT
OIL
SEAL(S) - INSTALLATION).
(6) Install camshaft target magnet and camshaft
position sensor.
(7) Install cylinder head cover (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - INSTALLATION).
(8) Install rear timing belt cover and camshaft
sprockets (Refer to 9 - ENGINE/VALVE TIMING/
TIMING BELT / CHAIN COVER(S) - INSTALLA-
TION).
(9) Install timing belt and front timing belt cover
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN
AND
SPROCKETS
-
INSTALLA-
TION).
CYLINDER HEAD COVER
REMOVAL
(1) Remove ignition coil and plug wires.
(2) Disconnect PCV and make-up air hoses from
cylinder head cover.
(3) Remove the cylinder head cover fasteners.
(4) Remove cylinder head cover from cylinder
head.
CLEANING
Clean cylinder head and cover mating surfaces
using a suitable solvent.
INSPECTION
Inspect cover rails for flatness.
INSTALLATION
NOTE: Replace spark plug well seals when install-
ing a new cylinder head cover gasket.
(1)
Install new cylinder head cover gaskets (Fig.
26) and spark plug well seals (Fig. 27).
(2) Replace cylinder head cover bolt seals (Fig. 28).
CAUTION: Do not allow oil or solvents to contact
the timing belt as they can deteriorate the rubber
and cause tooth skipping.
Fig. 24 Camshaft Bearing Cap Tightening Sequence
Fig. 25 Camshaft Bearing Cap Sealing
1 - 1.5 mm (.060 in.) DIAMETER BEAD OF MOPAR GASKET
MAKER
Fig. 26 Cylinder Head Cover Gasket and Spark Plug
Well Seals
1 - SPARK PLUG WELL SEALS
2 - GASKET
9 - 32
ENGINE 2.0L DOHC
JR
CAMSHAFT(S) (Continued)
(3)
Apply Mopar
t Engine RTV GEN II at the
camshaft cap corners and at the top edge of the 1/2
round seal (Fig. 29).
CAUTION: When installing cylinder head cover
bolts, be careful not to interchange the two (2) cen-
ter bolts with the seven (7) perimeter bolts. The two
(2)
center
bolts
contain
an
aluminum
washer
between the bolt head and torque limiter for sealing
purposes.
(4)
Install cylinder head cover assembly to cylin-
der head. Install all bolts, ensuring the two (2) bolts
containing the sealing washer are located in the cen-
ter locations of cover. Tighten bolts in sequence
shown in (Fig. 30). Using a 3 step torque method as
follows:
(a) Tighten all bolts to 4.5 N·m (40 in. lbs.).
(b) Tighten all bolts to 9.0 N·m (80 in. lbs.).
(c) Tighten all bolts to 12 N·m (105 in. lbs.).
(5) Connect PCV and make-up air hoses to cylin-
der head cover.
(6) Install ignition coil and plug wires. Tighten fas-
teners to 12 N·m (105 in. lbs.).
Fig. 27 Spark Plug Well Seals
Fig. 28 Cylinder Head Cover Bolt Seals
Fig. 29 Sealer Locations
1 – SEALER LOCATION
Fig. 30 Cylinder Head Cover Tightening Sequence
JR
ENGINE 2.0L DOHC
9 - 33
CYLINDER HEAD COVER (Continued)
HYDRAULIC LASH
ADJUSTERS
DIAGNOSIS AND TESTING
HYDRAULIC LASH ADJUSTER NOISE
DIAGNOSIS
A tappet-like noise may be produced from several
items. Check the following items.
(1) Engine oil level too high or too low. This may
cause aerated oil to enter the adjusters and cause
them to be spongy.
(2) Insufficient running time after rebuilding cylin-
der head. Low speed running up to 1 hour may be
required.
(3) During this time, turn engine off and let set for
a few minutes before restarting. Repeat this several
times after engine has reached normal operating
temperature.
(4) Low oil pressure.
(5) The oil restrictor (integral to the cylinder head
gasket) in the vertical oil passage to the cylinder
head is plugged with debris.
(6) Air ingested into oil due to broken or cracked
oil pump pick up.
(7) Worn valve guides.
(8) Rocker
arm
ears
contacting
valve
spring
retainer.
(9) Rocker arm loose, adjuster stuck or at maxi-
mum extension and still leaves lash in the system.
(10) Faulty lash adjuster.
• Check lash adjusters for sponginess while
installed in cylinder head. Depress part of rocker
arm over adjuster. Normal adjusters should feel very
firm. Spongy adjusters can be bottomed out easily.
• Remove suspected lash adjusters, and replace as
necessary.
REMOVAL
NOTE: This procedure is for in-vehicle service with
camshafts installed.
(1) Remove cylinder head cover (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - REMOVAL).
(2) Remove rocker arm (Refer to 9 - ENGINE/CYL-
INDER HEAD/ROCKER ARMS - REMOVAL).
(3) Remove hydraulic lifter (Fig. 31).
(4) Repeat removal procedure for each hydraulic
lifter.
(5) If reusing, mark each hydraulic lifter for reas-
sembly in original position. Lifters are serviced as an
assembly.
INSTALLATION
(1) Install hydraulic lifter (Fig. 31). Ensure the
lifters are at least partially full of engine oil. This is
indicated by little or no plunger travel when the
lifter is depressed.
(2) Install rocker arm (Refer to 9 - ENGINE/CYL-
INDER HEAD/ROCKER ARMS - INSTALLATION).
(3) Repeat installation procedure for each hydrau-
lic lifter.
(4) Install cylinder head cover (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - INSTALLATION).
INTAKE/EXHAUST VALVES &
SEATS
DESCRIPTION
The valves are made of heat resistant steel. They
have chrome plated stems to prevent scuffing. Viton
rubber valve stem seals are integral with the spring
seats. The valves have three-bead lock keepers to
retain springs and to promote valve rotation.
OPERATION
The four valves per cylinder (two intake and two
exhaust) are opened by using roller camshaft follow-
ers which pivot on hydraulic lash adjusters.
CLEANING
(1) Clean
all
valves
thoroughly
and
discard
burned, warped and cracked valves.
Fig. 31 Hydraulic Lifter
9 - 34
ENGINE 2.0L DOHC
JR
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