Dodge Ram Truck 1500-2500-3500. Manual — part 1337
2. Using a mirror, locate the TDC arrow on the front
cover. Rotate the crankshaft until the mark on the
crankshaft damper is aligned with the TDC arrow
on the front cover. The engine is now at TDC.
3. Note the location of the V8 mark stamped into the camshaft drive gears. If the V8 mark on each camshaft drive
gear is at the twelve o’clock position, the engine is at TDC (cylinder #1) on the exhaust stroke. If the V8 mark on
each gear is at the six o’clock position, the engine is at TDC (cylinder #1) on the compression stroke.
4. If both of the camshaft drive gears are off in the same or opposite directions, the primary chain or both second-
ary chains are at fault. Refer to Timing Chain and Sprockets procedure in this section.
5. If only one of the camshaft drive gears is off and the other is correct, the problem is confined to one secondary
chain. Refer to Single camshaft timing, in this procedure.
6. If both camshaft drive gear V8 marks are at the twelve o’clock or the six o’ clock position the engine base timing
is correct. Reinstall the cylinder head covers.
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ENGINE - 4.7L - SERVICE INFORMATION
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SINGLE CAMSHAFT TIMING
NOTE: to adjust the timing on one camshaft, peform the following procedure.
1. Using Chain Tensioner Wedge, special tool 8350 (3), stabilize the secondary chain drive. For reference purposes,
mark the chain-to-sprocket position.
2. Remove the camshaft drive gear retaining bolt.
3. Carefully remove the camshaft drive gear from the camshaft.
4. Re-index the camshaft drive gear in the chain until the V8 mark is at the same position as the V8 mark on the
opposite camshaft drive gear.
NOTE: When gripping the camshaft, place the pli-
ers on the tube portion of the camshaft only. Do
not grip the lobes or the sprocket areas.
5. Using a suitable pair of adjustable pliers (1), rotate
the camshaft until the alignment dowel (2) on the
camshaft is aligned with the slot in the camshaft
drive gear.
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ENGINE - 4.7L - SERVICE INFORMATION
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CAUTION:
Remove
excess
oil
from
camshaft
sprocket retaining bolt before reinstalling bolt.
Failure to do so may cause over-torqueing of bolt
resulting in bolt failure.
6. Position the camshaft drive gear onto the camshaft,
remove oil from bolt then install the retaining bolt.
Using Special Tools, Spanner Wrench 6958 with
Adapter Pins 8346 and a suitable torque wrench
(1), Tighten retaining bolt to 122N·m (90 ft. Lbs.).
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ENGINE - 4.7L - SERVICE INFORMATION
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7. Remove special tool 8350 (3,4).
8. Rotate the crankshaft two full revolutions, then reverify that the camshaft drive gear V8 marks are in fact aligned.
9. Install the cylinder head covers (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) -
INSTALLATION).
DR/DH
ENGINE - 4.7L - SERVICE INFORMATION
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