Content .. 481 482 483 484 ..

Dodge Dakota (R1). Manual - part 483

TIMING BELT / CHAIN
COVER(S)

REMOVAL

(1) Disconnect the battery negative cable.
(2) Drain cooling system (Refer to 7 - COOLING -

STANDARD PROCEDURE).

(3) Remove the serpentine belt (Refer to 7 - COOL-

ING/ACCESSORY DRIVE/DRIVE BELTS - REMOV-
AL).

(4) Remove water pump (Refer to 7 - COOLING/

ENGINE/WATER PUMP - REMOVAL).

(5) Remove power steering pump (Refer to 19 -

STEERING/PUMP - REMOVAL).

(6) Remove

vibration

damper

(Refer

ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).

(7) Loosen oil pan bolts and remove the front bolt

at each side.

(8) Remove the cover bolts.
(9) Remove chain case cover and gasket using

extreme caution to avoid damaging oil pan gasket.

(10) From the inside of the cover tap the front

crankshaft oil seal outward. Be careful not to damage
the timing cover sealing surface.

INSTALLATION

(1) Be sure mating surfaces of chain case cover

and cylinder block are clean and free from burrs.

(2) Using a new cover gasket, carefully install

chain case cover to avoid damaging oil pan gasket.
Use a small amount of Mopar

t GEN II Silicone Rub-

ber Adhesive Sealant, or equivalent, at the joint
between timing chain cover gasket and the oil pan
gasket. Finger tighten the timing chain cover bolts at
this time.

CAUTION: If chain cover is replaced for any reason,
be sure the oil hole (passenger side of cover) is
plugged.

NOTE: Special Tool 6635 must be used to align
cover and seal with crankshaft.

(3) Position the special tool 6635 onto the crank-

shaft (Fig. 82).

(4) Tighten chain case cover bolts to 41 N·m (30 ft.

lbs.) torque. Tighten oil pan bolts to 24 N·m (215 in.
lbs.) torque.

(5) Remove special tool 6635.
(6) Inspect

the

seal

flange

the

vibration

damper.

(7) Install vibration damper (Refer to 9 - ENGINE/

ENGINE BLOCK/VIBRATION DAMPER - INSTAL-
LATION).

(8) Install water pump (Refer to 7 - COOLING/EN-

GINE/WATER PUMP - INSTALLATION).

(9) Install power steering pump (Refer to 19 -

STEERING/PUMP - INSTALLATION).

(10) Install the serpentine belt (Refer to 7 - COOL-

ING/ACCESSORY DRIVE/DRIVE BELTS - INSTAL-
LATION).

(11) Install the cooling system fan (Refer to 7 -

COOLING/ENGINE/FAN

DRIVE

VISCOUS

CLUTCH - INSTALLATION).

(12) Position the fan shroud and install the bolts.

Tighten the bolts to 11 N·m (95 in. lbs.) torque.

(13) Fill cooling system (Refer to 7 - COOLING -

STANDARD PROCEDURE).

(14) Connect the negative cable to the battery.

TIMING BELT/CHAIN
TENSIONER AND PULLEY

DESCRIPTION

The timing chain tensioner is a stamped steel con-

stant tension mechanical design. It is mounted to the
front of the engine, behind the timing chain drive.

OPERATION

The timing chain tension is maintained by routing

the timing chain through the tensioner assembly. A
nylon covered spring steel arm presses on the timing
chain maintaining the correct chain tension.

Fig. 82 Position Special Tool 6635 onto Crankshaft

1 - SPECIAL TOOL 6635
2 - OIL SEAL
3 - TIMING CHAIN COVER

9 - 120

ENGINE 3.9L

TIMING BELT/CHAIN AND
SPROCKETS

REMOVAL

(1) Disconnect battery negative cable.
(2) Drain cooling system (Refer to 7 - COOLING -

STANDARD PROCEDURE).

(3) Remove timing chain cover (Refer to 9 -

ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).

(4) Rotate crankshaft to align timing marks (Fig.

84) to #1 TDC.

(5) Remove camshaft sprocket attaching bolt and

remove timing chain with crankshaft and camshaft
sprockets.

(6) Slip crankshaft sprocket onto crankshaft and

compress tensioner shoe by placing a large screw-
driver between crankshaft sprocket and tensioner
shoe (Fig. 83). Compress shoe until hole in shoe lines
up with hole in bracket. Slide a suitable pin into the
holes (Fig. 83) and remove screwdriver.

(7) If tensioner assembly is to be replaced, remove

the three tensioner to block bolts and remove ten-
sioner assembly.

INSPECTION—MEASURING TIMING CHAIN
STRETCH

NOTE: Timing chain tensioner must be removed for
this operation.

(1) Place a scale next to the timing chain so that

any movement of the chain can be measured.

(2) Place a torque wrench and socket over cam-

shaft sprocket attaching bolt. Apply torque in the
direction of crankshaft rotation to take up slack; 41
N·m (30 ft. lbs.) torque with cylinder head installed
or 20 N·m (15 ft. lbs.) torque with cylinder head
removed.

With

torque

applied

the

camshaft

sprocket bolt, crankshaft should not be permitted to
move. It may be necessary to block the crankshaft to
prevent rotation.

(3) Hold a scale with dimensional reading even

with the edge of a chain link. With cylinder heads
installed, apply 14 N·m (30 ft. lbs.) torque in the
reverse direction. With the cylinder heads removed,
apply 20 N·m (15 ft. lbs.) torque in the reverse direc-
tion. Note the amount of chain movement (Fig. 85) .

(4) Install a new timing chain, if its movement

exceeds 3.175 mm (1/8 inch).

Fig. 83 Compressing Tensioner For Chain

Installation

1 - SCREWDRIVER
2 - INSERT PIN HERE

Fig. 84 Alignment of Timing Marks

1 - TIMING MARKS

ENGINE 3.9L

9 - 121