Chrysler Dodge Caravan 2002 Manual page 1302

RS
CYLINDER HEAD (Continued)
1 - VALVE LOCKS
2 - RETAINERS
3 - VALVE SPRINGS
4 - VALVE STEM SEALS
(4) Remove the cylinder head covers. (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - REMOVAL)
(5) Remove the spark plugs from cylinder head.
(6) Remove the dipstick and tube (Fig. 18).
(7) Remove exhaust manifold(s). (Refer to 9 -
ENGINE/MANIFOLDS/EXHAUST
REMOVAL)
(8) Remove rocker arm and shaft assemblies.(Refer
to 9 - ENGINE/CYLINDER HEAD/ROCKER ARMS -
REMOVAL) Remove push rods and mark positions
to ensure installation in original locations.
(9) Remove the eight head bolts from each cylinder
head and remove cylinder heads (Fig. 22).
CLEANING
To ensure engine gasket sealing, proper surface
preparation must be performed, especially with the
use of aluminum engine components and multi-layer
steel cylinder head gaskets.
Fig. 17 Cylinder Head and Components
HEAD/CYLINDER
MANIFOLD
5 - SPRING SEATS
6 - CYLINDER HEAD
7 - VALVE - EXHAUST
8 - VALVE - INTAKE
NOTE: Multi-Layer Steel (MLS) head gaskets require
HEAD a scratch free sealing surface.
Remove all gasket material from cylinder head and
block (Refer to 9 - ENGINE - STANDARD PROCE-
DURE). Be careful not to gouge or scratch the alumi-
num head sealing surface.
-
Clean all engine oil passages.
INSPECTION
(1) Before cleaning, check for leaks, damage and
cracks.
(2) Clean cylinder head and oil passages.
(3) Check cylinder head for flatness (Fig. 19).
(4) Cylinder head must be flat within:
• Standard dimension = less than 0.05 mm (0.002
inch.)
• Service Limit = 0.2 mm (0.008 inch.)
• Grinding Limit = Maximum of 0.2 mm (0.008
inch.) is permitted.
ENGINE 3.3/3.8L 9 - 101