Dodge dakota 2002 Service Manual page 1423

9 - 174 ENGINE - 4.7L
TIMING BELT/CHAIN AND SPROCKETS (Continued)
Fig. 134 Installing Idler Gear, Primary and
Secondary Timing Chains
1 - SPECIAL TOOL 8429
2 - PRIMARY CHAIN IDLER SPROCKET
3 - CRANKSHAFT SPROCKET
CAUTION: Ensure the plate between the left sec-
ondary chain tensioner and block is correctly
installed.
(15) Install both
Tighten bolts to 28 N·m (250 in. lbs.).
NOTE: Left and right secondary chain tensioners
are not common.
(16) Before installing idler sprocket bolt, lubricate
washer with oil, and tighten idler sprocket assembly
retaining bolt to 34 N·m (25 ft. lbs.).
(17) Remove all locking pins (3) from tensioners.
CAUTION: After pulling locking pins out of each
tensioner, DO NOT manually extend the tensioner(s)
ratchet. Doing so will over tension the chains,
resulting in noise and/or high timing chain loads.
(18) Using Special Tool 6958, Spanner with Adap-
tor Pins 8346, tighten left (Fig. 135) and right (Fig.
136). camshaft sprocket bolts to 122 N·m (90 ft. lbs.).
(19) Rotate engine two full revolutions. Verify tim-
ing marks are at the follow locations:
• primary chain idler sprocket dot is at 12 o'clock
(Fig. 131)
• primary chain crankshaft sprocket dot is at 6
o'clock (Fig. 131)
• secondary chain camshaft sprockets "V8" marks
are at 12 o'clock (Fig. 131)
(20) Lubricate all three chains with engine oil.
secondary chain tensioners.
Fig. 135 Tightening Left Side Camshaft Sprocket
1 - TORQUE WRENCH
2 - CAMSHAFT SPROCKET
3 - LEFT CYLINDER HEAD
4 - SPECIAL TOOL 6958 SPANNER WITH ADAPTER PINS 8346
(21) After installing all chains, it is recommended
that the idler gear end play be checked (Fig. 137).
The end play must be within 0.10–0.25 mm (0.004–
0.010 in.). If not within specification, the idler gear
must be replaced.
(22) Install timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION)
damper (Refer to 9 - ENGINE/ENGINE BLOCK/VI-
BRATION DAMPER - INSTALLATION).
(23) Install cylinder head covers (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - INSTALLATION).
NOTE: Before installing threaded plug in right cylin-
der head, the plug must be coated with sealant to
prevent leaks.
(24) Coat the large threaded access plug with
Mopar Thread Sealant with Teflon, then install
into the right cylinder head and tighten to 81 N·m
(60 ft. lbs.) (Fig. 126).
Bolt
and crankshaft
HEAD/CYLINDER
DR
HEAD