Page 1609 of 5267
TIMING - SINGLE CAMSHAFT
NOTE: to adjust the timing on one camshaft, pre-
form the following procedure.
1. Using Chain Tensioner Wedge, Special Tool 8379
(2), stabilize the secondary chain drive. For refer-
ence purposes, mark the chain-to-sprocket
position.
2. Remove the camshaft drive gear retaining bolt (3).
3. Carefully remove the camshaft drive gear from the
camshaft.
Page 1610 of 5267
4. Re-index the camshaft drive gear in the chain until the V6 mark is at the same position as the V6 mark on the
opposite camshaft drive gear (1,2).
5. Using Special Tool 8428 Camshaft Wrench, rotate the camshaft until the alignment dowel on the camshaft is
aligned with the slot in the camshaft drive gear.
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 boltthen install the retaining bolt. Using
Special Tools, Spanner Wrench 6958 with Adapter Pins 8346 and a suitable torque wrench, Tighten retaining bolt
to 122 Nꞏm (90 ft. Lbs.).
7. Remove Special Tool 8379.
8. Rotate the crankshaft two full revolutions, then verify that the camshaftdrivegearV6marksareinfactaligned.
9. Install the cylinder head covers. Refer to Cylinder Head Cover in this section.
Page 1611 of 5267
SHAFT-BALANCE
REMOVAL
1. Remove the primary and secondary timing chains.
Refer to TIMING CHAIN and SPROCKET.
NOTE: The balance shaft and gear are serviced as
an assembly. Do not attempt to remove the gear
from the balance shaft.Remove the retaining bolt
(4) from the counterbalance shaft thrust plate (2).
2. Using Special Tool 8641 Counterbalance shaft
remover/installer tool (1), remove the counterbal-
ance shaft from the engine .
Page 1612 of 5267
INSTALLATION
NOTE: The balance shaft and gear are serviced as
an assembly. Do not attempt to remove the gear
from the balance shaft.
1. Coat counterbalance shaft bearing journals with
clean engine oil.
NOTE: The balance shaft is heavy, and care
should be used when installing shaft, so bearings
are not damaged.
2. Using Special Tool 8641 Counterbalance shaft
remover/installer tool (1), carefully install counter-
balance shaft into engine.
3. Install Counterbalance shaft thrust plate retaining
bolt (4) finger tight.Do not tighten bolt at this time.
4. Position the right side of the thrust plate with the
right chain guide bolt, install bolt finger tight.
5. Torque the thrust plate retaining bolt (4) to 28 Nꞏm
(250 in. lbs.).
6. Remove the chain guide bolt so that guide can be
installed.
Page 1613 of 5267

SHAFT-IDLER
REMOVAL
1. Remove the primary and secondary timing chains and sprockets. Refer to procedure in this section.
NOTE: To remove the idler shaft, it is necessary to tap threads into the shaft, to install the removal tool.
2. Using a 12 mm X 1.75 tap, cut threads in the idler shaft center bore.
3. Cover the radiator core with a suitable cover.
CAUTION: Use care when removing the idler shaft, Do not strike the radiatorcooling fins with the slide
hammer.
4. Using Special Tool 8517 Slide Hammer, remove the idler shaft.
INSTALLATION
1. Thoroughly clean the idler shaft bore.
2. Position the idler shaft in the bore.
NOTE: The two lubrication holes in the idler shaft do not require any specialalignment.
NOTE: Before using the retaining bolt to install the idler shaft, coat the threads and the pilot on the idler
shaft, with clean engine oil.
3. Using the primary idler sprocket retaining bolt and washer, carefully draw the idler shaft into the bore until fully
seated.
4. Coat the idler shaft with clean engine oil.
5. Install the timing chains and sprockets. Refer to procedure in this section.
Page 1614 of 5267

COVER-TIMING
REMOVAL
1. Disconnect the battery negative cable.
2. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
3. Remove electric cooling fan and fan shroud assem-
bly.
4. Remove fan and fan drive assembly (Refer to 7 -
COOLING/ENGINE/FAN DRIVE VISCOUS
CLUTCH - REMOVAL).
5. Disconnect both heater hoses at timing cover.
6. Disconnect lower radiator hose at engine.
7. Remove accessory drive belt tensioner assembly
(1).
8. Remove crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
9. Remove the generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - REMOVAL).
10. Remove A/C compressor (Refer to 24 - HEATING
& AIR CONDITIONING/PLUMBING/A/C COM-
PRESSOR - REMOVAL).
CAUTION: The 3.7L engine uses an anerobic
sealer instead of a gasket to seal the front cover
to the engine block, from the factory. For service,
Mopar
Grey Engine RTV sealant must be substi-
tuted.
NOTE: It is not necessary to remove the water
pump for timing cover removal.
11. Remove the bolts holding the timing cover to
engine block .
12. Remove the timing cover.
Page 1615 of 5267

INSTALLATION
CAUTION: Do not use oil based liquids to clean
timing cover or block surfaces. Use only rubbing
alcohol, along with plastic or wooden scrapers.
Use no wire brushes or abrasive wheels or metal
scrapers, or damage to surfaces could result.
1. Clean timing chain cover and block surface using
rubbing alcohol.
CAUTION: The 3.7L uses a special anerobic sealer
instead of a gasket to seal the timing cover to the
engine block, from the factory. For service repairs,
Mopar
Engine Grey RTV must be used as a sub-
stitute.
2. Inspect the water passage o-rings for any damage,
and replace as necessary.
3. Apply Mopar
Grey Engine RTV sealer (3) to front
cover(1)followingthepathprovidedusinga3to
4mm thick bead (3).
4. Install cover. Tighten fasteners in sequence as
showninto58Nꞏm(43ft.lbs.).
5. Install crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER - INSTAL-
LATION).
6. Install the A/C compressor (Refer to 24 - HEATING
& AIR CONDITIONING/PLUMBING/A/C COM-
PRESSOR - INSTALLATION).
7. Install the generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - INSTALLATION).
8. Install accessory drive belt tensioner assembly
(Refer to 7 - COOLING/ACCESSORY DRIVE/BELT
TENSIONERS - INSTALLATION).
9. Install radiator upper and lower hoses.
10. Install both heater hoses.
11. Install electric fan shroud and viscous fan drive
assembly (Refer to 7 - COOLING/ENGINE/FAN
DRIVE VISCOUS CLUTCH - INSTALLATION).
12. Fill cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
13. Connect the battery negative cable.
Page 1616 of 5267
CHAIN AND SPROCKETS-TIMING
REMOVAL
1. Disconnect negative cable from battery.
2. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
3. Remove right and left cylinder head covers (Refer
to 9 - ENGINE/CYLINDER HEAD/CYLINDER
HEAD COVER(S) - REMOVAL).
4. Remove radiator fan shroud (Refer to 7 - COOL-
ING/ENGINE/RADIATOR FAN - REMOVAL).
5. Rotate engine until timing mark on crankshaft
damper (2) aligns with TDC mark on timing chain
cover (2) and the camshaft sprocket “V6” marks
are at the 12 o’clock position (No. 1 TDC exhaust
stroke).