DODGE RAM SRT-10 2006 Service Repair Manual

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 .

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.

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.

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.

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.

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).

6. Remove power steering pump (Refer to 19 -
STEERING/PUMP - REMOVAL).
7. Remove access plug from left and right cylinder
heads for access to chain guide fasteners.
8. Remove the oil fill housing to gain access to the
right side tensioner arm fastener.
9. Remove crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL) and timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
10. Collapse and pin primary chain tensioner.
CAUTION: Plate behind left secondary chain ten-
sioner could fall into oil pan. Therefore, cover pan
opening.
11. Remove secondary chain tensioners.
12. Remove camshaft position sensor (2).

CAUTION: Care should be taken not to damage
camshaft target wheel. Do not hold target wheel
while loosening or tightening camshaft sprocket.
Do not place the target wheel near a magnetic
source of any kind. A damaged or magnetized tar-
get wheel could cause a vehicle no start condition.
CAUTION: Do not forcefully rotate the camshafts
or crankshaft independently of each other. Damag-
ing intake valve to piston contact will occur.
Ensure negative battery cable is disconnected to
guard against accidental starter engagement.
13. Remove left and right camshaft sprocket bolts.
14. While holding the left camshaft steel tube with
Special Tool 8428 Camshaft Wrench (2), remove
the left camshaft sprocket. Slowly rotate the cam-
shaft approximately 5 degrees clockwise to a neu-
tral position.
15. While holding the right camshaft steel tube with
Special Tool 8428 Camshaft Wrench (2), remove
the right camshaft sprocket.
16. Remove idler sprocket assembly bolt.
17. Slide the idler sprocket assembly and crank sprocket forward simultaneously to remove the primary and sec-
ondary chains.
18. Remove both pivoting tensioner arms and chain guides.
19. Remove primary chain tensioner.
INSPECTION
Inspect the following components:
Sprockets for excessive tooth wear. Some tooth markings are normal and nota cause for sprocket replace-
ment.
Idler sprocket assembly bushing and shaft for excessive wear.
Idler sprocket assembly spline joint. The joint should be tight with no backlash or axial movement.
Chain guides and tensioner arms. Replace these parts if grooving in plasticfaceismorethan1mm(0.039in.)
deep. If plastic face is severely grooved or melted, the tensioner lube jetmay be clogged. The tensioner
should be replaced.
Secondary chain tensioner piston and ratcheting device. Inspect for evidence of heavy contact between ten-
sioner piston and tensioner arm. If this condition exist the tensioner tensioner arm and chain should be
replaced.
Primary chain tensioner plastic faces. Replace as required.

INSTALLATION
1. Using a vise, lightly compress the secondary chain
tensioner piston (5) until the piston step is flush
with the tensioner body. Using a pin or suitable
tool, release ratchet pawl by pulling pawl back
against spring force through access hole on side of
tensioner. While continuing to hold pawl back, Push
ratchet device to approximately 2 mm from the ten-
sioner body. Install Special Tool 8514 lock pin (3)
into hole on front of tensioner. Slowly open vise (1)
to transfer piston spring force to lock pin.
2. Position primary chain tensioner over oil pump and
insert bolts into lower two holes on tensioner
bracket. Tighten bolts to 28 Nꞏm (250 in. lbs.).
3. Install right side chain tensioner arm. Install Torx
bolt. Tighten Torxbolt to 28 Nꞏm (250 in. lbs.).
CAUTION: The silver bolts retain the guides to the
cylinder heads and the black bolts retain the
guides to the engine block.
4. Install the left side chain guide. Tighten the bolts to
28 Nꞏm (250 in. lbs.).
5. Install left side chain tensioner arm, and Torx
bolt.
Tighten Torx
bolt to 28 Nꞏm (250 in. lbs.).
6. Install the right side chain guide. Tighten the bolts
to 28 Nꞏm (250 in. lbs.).
7. Install both secondary chains onto the idler
sprocket. Align two plated links on the secondary
chains to be visible through the two lower openings
on the idler sprocket (4 o’clock and 8 o’clock).
Once the secondary timing chains are installed,
position special tool 8429 (1) to hold chains in
place for installation.
8. Align primary chain double platedlinks with the timing mark at 12 o’clock on the idler sprocket. Align the primary
chain single plated link with the timing mark at 6 o’clock on the crankshaftsprocket.
9. Lubricate idler shaft and bushings with clean engine oil.

NOTE: The idler sprocket must be timed to the
counterbalance shaft drive gear before the idler
sprocket is fully seated.
10. Install all chains, crankshaft sprocket, and idler
sprocket as an assembly. After guiding both sec-
ondary chains through the block and cylinder
head openings, affix chains with a elastic strap or
equivalent. This will maintain tension on chains to
aid in installation. Align the timing mark (2) on the
idler sprocket gear (3) to the timing mark on the
counterbalance shaft drive gear (1), then seat
idler sprocket fully. Before installing idler sprocket
bolt, lubricate washer with oil, and tighten idler
sprocketassemblyretainingboltto34Nꞏm(25ft.
lbs.).
NOTE: It will be necessary to slightly rotate camshafts for sprocket installation.
11. Align left camshaft sprocket “L” dot to plated link on chain.
12. Align right camshaft sprocket “R” dot to plated link on chain.
CAUTION: Remove excess oil from the camshaft sprocket bolt. Failure to do so can result in over-torque of
bolt resulting in bolt failure.
13. Remove Special Tool 8429, 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 sprocketsand the “V6” marks on camshaft sprockets
are at the 12 o’clock position.