Chrysler 300M 2002 Service Manual page 965

9 - 28 ENGINE 2.7L
CYLINDER HEAD (Continued)
(7) Install all valvetrain components and cam-
shafts. (Refer to 9 - ENGINE/CYLINDER HEAD/
CAMSHAFT(S) - INSTALLATION) Tighten camshaft
bearing caps in sequence shown in (Fig. 19)
Fig. 19 Camshaft Bearing Cap Tightening Sequence
(8) Install timing chain and sprockets. (Refer to 9 -
ENGINE/VALVE TIMING/TIMING
AND SPROCKETS - INSTALLATION)
(9) Install water outlet connector (Fig. 12). (Refer
to 7 - COOLING/ENGINE/COOLANT
HOUSING - INSTALLATION)
(10) Install cylinder head covers. (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - INSTALLATION)
(11) Install timing chain cover and crankshaft
vibration damper. (Refer to 9 - ENGINE/VALVE TIM-
ING/TIMING BELT / CHAIN COVER(S) - INSTAL-
LATION) (Refer to 9 - ENGINE/ENGINE BLOCK/
VIBRATION DAMPER - INSTALLATION)
(12) Install lower and upper intake manifolds.
(Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANI-
FOLD - INSTALLATION)
(13) Install accessory drive belts. (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION)
(14) Fill cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE)
(15) Connect negative cable to remote jumper ter-
minal.
CAMSHAFT(S)
DESCRIPTION
The assembled fabricated camshafts are composed
of five bearing journals machined into a hollow steel
tube (Fig. 20). Six steel lobes, a secondary timing
drive sprocket, and a primary sprocket/thrust flange
are pressed onto the camshaft tube using a unique
assembly process. Camshaft end play is controlled by
the primary camshaft sprocket attachment flange on
the intake camshafts and by a thrust flange on the
exhaust camshafts.
BELT/CHAIN
OUTLET
HEAD/CYLINDER
OPERATION
The camshaft has precisely machined (egg shaped)
lobes to provide accurate valve timing and duration.
The camshaft is driven by the crankshaft via drive
sprockets and chains.
STANDARD PROCEDURE - CAMSHAFT END
PLAY
(1) Measure camshafts end play by mounting a
dial indicator to a stationary point on cylinder head
(Fig. 21).
(2) Locate the probe perpendicular against the end
of camshaft being checked.
(3) Move camshaft all the way to the rear of its
travel. Zero the dial indicator.
(4) Move camshaft forward to limits of travel and
read the dial indicator.
REMOVAL
(1) Remove the primary timing chain. (Refer to 9 -
ENGINE/VALVE
AND SPROCKETS - REMOVAL)
(2) Remove secondary chain tensioner mounting
bolts.
NOTE: Camshaft bearing caps have been marked
HEAD
during engine manufacturing. For example, number
one exhaust camshaft bearing is marked "1E>"
(3) Slowly loosen camshaft bearing cap bolts in
reverse order of installation (Fig. 22).
(4) Remove camshaft bearing caps.
(5) Remove camshafts, secondary chain, and ten-
sioner together as an assembly.
(6) Remove tensioner and camshaft chain from
camshafts.
(7) Inspect camshafts. (Refer to 9 - ENGINE/CYL-
INDER HEAD/CAMSHAFT(S) - INSPECTION)
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) Inspect camshaft sprockets for excessive wear.
Replace camshafts if necessary.
(3) Check the cam lobe surfaces for abnormal wear
and damage. Replace camshaft if defective. Measure
the actual wear (Fig. 23)and replace, if out of lim-
its—standard value is 0.0254 mm (0.001 in.); wear
limit is 0.254 mm (0.010 in.).
TIMING/TIMING BELT/CHAIN
LH