Dodge dakota 2002 Service Manual page 1627

9 - 378 ENGINE 8.0L
INTAKE/EXHAUST VALVES & SEATS (Continued)
(3) Compress valve springs using Valve Spring
Compressor Tool MD-998772A with Adapter 6716A
and Screw 6765 (Fig. 21). Tap the retainer using a
brass drift and ball peen hammer to loosen locks
away from retainer.
Fig. 21 Valve Spring Compressor MD-998772A with
Adaptor 6716-A and Screw 6765
1 - SPECIAL TOOL MD 998772A
2 - SPECIAL TOOL 6765
3 - SPECIAL TOOL 6716A
4 - AIR HOSE
(4) Remove valve retaining locks, valve spring
retainers and valve springs. Check for abnormal
wear, replace as required.
(5) Remove the valve stem seals.
(6) Before removing valves, remove any burrs from
valve stem lock grooves to prevent damage to the
valve guides. Identify valves to ensure installation in
original location.
CLEANING
Clean valves thoroughly. Discard burned, warped,
or cracked valves.
Remove carbon and varnish deposits from inside of
valve guides with a reliable guide cleaner.
INSPECTION
Measure valve stems for wear. If wear exceeds
0.051 mm (0.002 in.), replace the valve.
Measure valve stem guide clearance as follows:
(1) Install Valve Guide Sleeve Tool C-3973 over
valve stem and install valve (Fig. 22). The special
sleeve places the valve at the correct height for
checking with a dial indicator.
(2) Attach dial indicator Tool C-3339 to cylinder
head and set it at right angles to valve stem being
measured (Fig. 23).
(3) Move valve to and from the indicator. The total
dial indicator reading should not exceed 0.432 mm
(0.017 in.). Ream the guides for valves with oversize
Fig. 22 Positioning Valve with Tool C-3973
1 - VALVE
2 - SPACER TOOL
Fig. 23 Measuring Valve Guide Wear
1 - VALVE
2 - SPECIAL TOOL C-3339
stems if dial indicator reading is excessive or if the
stems are scuffed or scored.
INSTALLATION
INSTALLATION—VALVE STEM SEAL
(1) Install new seal onto valve stem.
(2) Position valve spring onto valve stem.
(3) Position Valve Spring Compressor with Adapter
Studs onto cylinder head
(4) Compress valve spring and install retainer
valve locks.
(5) Remove air hose and adapter from spark plug
hole.
(6) Remove Valve Spring Compressor and Adapter
Studs.
(7) Install rocker arms (Refer to 9 - ENGINE/CYL-
INDER HEAD/ROCKER ARM / ADJUSTER ASSY -
INSTALLATION).
DR