Dodge 2000 DURANGO Service Manual page 563

9 - 54 4.7L ENGINE
REMOVAL AND INSTALLATION (Continued)
Fig. 85 Installing Idler Gear, Primary and Secondary
Timing Chains
1 – SPECIAL TOOL 8515
2 – PRIMARY CHAIN IDLER SPROCKET
3 – CRANKSHAFT SPROCKET
(13) Remove Special Tool 8515, then attach both
sprockets to camshafts. Remove excess oil from bolts,
then Install sprocket bolts, but do not tighten at this
time.
(14) Verify that all plated links are aligned with
the marks on all sprockets and the "V8" marks on
camshaft sprockets are at the 12 o'clock position (Fig.
82).
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. 86) and right (Fig.
87). camshaft sprocket bolts to 122 N·m (90 ft. lbs.).
secondary chain tensioners.
Fig. 86 Tightening Left Side Camshaft Sprocket Bolt
1 – TORQUE WRENCH
2 – CAMSHAFT SPROCKET
3 – LEFT CYLINDER HEAD
4 – SPECIAL TOOL 6958 SPANNER WITH ADAPTER PINS 8346
(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. 82)
• primary chain crankshaft sprocket dot is at 6
o'clock (Fig. 82)
• secondary chain camshaft sprockets "V8" marks
are at 12 o'clock (Fig. 82)
(20) Lubricate all three chains with engine oil.
(21) After installing all chains, it is recommended
that the idler gear end play be checked (Fig. 88). 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 and crankshaft
damper. Refer to procedures in this section.
(23) Install cylinder head covers. Refer to proce-
dures in this section.
NOTE: Before installing threaded plug in right cyl-
inder head, the plug must be coated with sealant to
prevent leaks.
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