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9-38
ENGINES-8-CYLINDER
inspect the timing chain for wear, and check the ac-
curacy of the "0" mark on the timing indicator. Turn
the crankshaft counter-clockwise until the valve is
closed and remove the indicator and readjust lash for
273 and 318 cubic inch engines or remove the spacer
on the 361, 383, and 426 cubic inch engines.
TIMING SPROCKETS AND CHAIN
Removal
(1) Drain the cooling system and remove the radia-
tor and water pump assembly.
(2) Remove the bolt holding the vibration damper
on the crankshaft.
(3) Remove two of the pulley bolts, install Tool
(2-3688 and pull the damper assembly off the end
of
crankshaft, as shown in Figure 84.
(4) On the 273 and 318 cubic inch engines remove
the fuel line and fuel pump.
(5) Remove the chain case cover and gasket, using
extreme caution to avoid damaging the oil pan gasket.
It is normal to find particles of neoprene collected be-
tween the crankshaft seal retainer and the crankshaft
oil slinger.
(6) Slide the crankshaft oil slinger off the end
of
the crankshaft.
(7) Remove the camshaft sprocket attaching bolt.
(8) Remove the timing chain with the crankshaft
and camshaft sprockets.
Installing Timing Chain
On 273 and 318 cubic inch engines when installing
the timing chain, use Tool C-3509 to prevent the cam-
shaft from contacting the welch plug in the rear of
the engine block. Remove the distributor and the oil
pump-distributor drive gear. Locate tool against rear
side of cam gear and attach the tool with distributor
retainer plate bolt (Fig. 85). The tool should re-
main installed until the camshaft and crankshaft
sprockets and timing chain have been installed.
On 361, 383 and 426 Cubic Inch Engines modify
,CHAIN
CASE COVER
-
TIMING INDICATOR
YLINDER B L O C K
TIMING MARK
VIBRATION D A M P E R
/
,TOOL
Fig. 85-Camshaft
Holding Tool C-3509
1273
8
318 Cubic lnchl
Tool C-3509 by grinding off the index lug holding the
upper arm on the tool and rotate the arm 180". Install
Tool C-3509 in place of distributor drive gear and
shaft, shown in Figure 86, and attach the tool with
the distributor retainer plate bolt.
(1) Place both the camshaft sprocket and crank-
shaft sprocket on the bench with the timing marks on
the exact imaginary center line through both cam-
shaft and crankshaft bores.
(2) Place the timing chain around both sprockets.
(3) Turn the crankshaft and camshaft to line up
with the keyway location in crankshaft sprocket and
the dowel holes in the camshaft sprocket.
(4) Lift the sprockets and chain (keep sprockets
tight against the chain in position as described).
(5) Slide both sprockets evenly over their respec-
tive shafts.
(6) Use a straightedge to check the alignment of the
timing marks (Fig.
87).
Fig. 8rF-Removing Vibration Damper Assembly
Using 1001
C-3688
Fig. 8 6 C a m s h a f t Holding Tool C-3509
1361,383
8
426 Cubic Inch)
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