Chrysler Sebring 2005 Service Manual page 1174

JR
HYDRAULIC LASH ADJUSTERS (Continued)
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
COVER(S) - REMOVAL)
(2) Remove rocker arm. (Refer to 9 - ENGINE/
CYLINDER HEAD/ROCKER ARMS - REMOVAL)
(3) Remove hydraulic lash adjuster (Fig. 30).
(4) Repeat removal procedure for each hydraulic
lash adjuster.
(5) If reusing, mark each hydraulic lash adjuster
for reassembly in original position. Lash adjusters
are serviced as an assembly.
Fig. 30 Hydraulic Lash Adjuster
INSTALLATION
(1) Install hydraulic
Ensure the lash adjusters 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 lash adjuster.
(4) Install cylinder head cover. (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - INSTALLATION)
HEAD/CYLINDER
lash adjuster (Fig.
HEAD/CYLINDER
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
HEAD
The four valves per cylinder (two intake and two
exhaust) are opened by using roller rocker arms
which pivot on hydraulic lash adjusters.
CLEANING
(1) Clean
burned, warped and cracked valves.
ROCKER ARMS
REMOVAL
NOTE: This procedure is for in-vehicle service with
camshafts installed.
(1) Disconnect negative battery cable.
(2) Remove cylinder head cover. (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - REMOVAL)
(3) Remove spark plugs.
(4) Rotate engine until the camshaft lobe, on the
follower being removed, is positioned on its base cir-
cle (heel). Also, the piston should be a minimum of
6.3 mm (0.25 in) below TDC position.
CAUTION: If cam follower assemblies are to be
reused, always mark position for reassembly in
30).
their original positions.
(5) Using Special Tools 8215-A and 8436 slowly
depress valve assembly until rocker arm can be
removed (Fig. 31).
(6) Repeat removal procedure for each rocker arm.
INSPECTION
Inspect the rocker arm for wear or damage (Fig.
HEAD
32). Replace as necessary.
INSTALLATION
(1) Lubricate rocker arm with clean engine oil.
(2) Using Special Tools 8215-A and 8436 slowly
depress valve assembly until rocker arm can be
installed on the hydraulic lifter and valve stem (Fig.
31).
ENGINE 2.4L DOHC
all valves thoroughly
HEAD/CYLINDER
9 - 105
and discard
HEAD