clock DODGE RAM SRT-10 2006 Service User Guide

INSTALLATION
1. coat the valve stem with clean engine oil and insert
it into the cylinder head.
2. Install the valve stem seal. make sure the seal is
fully seated and that the garter spring at the top of
the seal is intact.
3. Install the spring and the spring retainer.
4. Using the valve spring compressor, compress the
spring and install the two valve spring retainer
halves.
5. Release the valve spring compressor and make
sure the two spring retainer halves and the spring
retainer are fully seated.
6. lubricate the camshaft journal with clean engine oil
then Position the camshaft (with the sprocket dowel
on the left camshaft at 11 o’clock and the right
camshaft at 12 o’clock), then position the camshaft
bearing caps.
7. Install the camshaft bearing cap retaining bolts.
Tighten the bolts 9-13 Nꞏm (100 in. lbs.) in 1/2 turn
increments in the sequence shown .
8. Position the hydraulic lash adjusters and rocker
arms (Refer to 9 - ENGINE/CYLINDER HEAD/
ROCKER ARM / ADJUSTER ASSY -
INSTALLATION).

12. Verify the V6 mark on the camshaft sprocket is at the 12 o’clock position. Rotate the crankshaft one turn if
necessary.
13. Remove the crankshaft damper (Refer to 9 - ENGINE/ENGINE BLOCK/VIBRATION DAMPER - REMOVAL).
14. Remove the timing chain cover (Refer to 9 - ENGINE/VALVE TIMING/TIMINGBELT / CHAIN COVER(S) -
REMOVAL).
15. Lock the secondary timing chains to the idler
sprocket using Special Tool 8429 Timing Chain
Holding Fixture (1).
NOTE: Mark the secondary timing chain prior to
removal to aid in installation.
16. Mark the secondary timing chain, one link on
each side of the V6 mark on the camshaft drive
gear.
17. Remove the right side secondary chain tensioner
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN AND SPROCKETS - REMOVAL).

CAMSHAFT
DESCRIPTION
The camshafts consist of powdered metal steel lobes which are sinter-bonded to a steel tube. Four bearing journals
are machined into the camshaft. Camshaft end play is controlled by two thrust walls that border the nose piece
journal.
REMOVAL
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully
rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can
occur.
CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use special tool 8379 will
result in hydraulic tensioner ratchet over extension, Requiring timing chain cover removal to re-set the ten-
sioner ratchet.
1. Remove the cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) -
REMOVAL).
2. Set engine to TDC cylinder No. 1, camshaft sprocket V6 marks at the 12 o’clock position (1).
3. Mark one link on the secondary timing chain on both sides of the V6 mark on the camshaft sprocket to aid in
installation.

INSTALLATION
1. Lubricate camshaft journals with clean engine oil.
NOTE: Position the right side camshaft so that the
camshaft sprocket dowel is near the 10 o’clock
position, This will place the camshaft at the neu-
tral position easing the installation of the camshaft
bearing caps.
2. Position the camshaft into the cylinder head.
3. Install the camshaft bearing caps, hand tighten the
retaining bolts.
NOTE: Caps should be installed so that the
stamped numbers on the caps are in numerical
order, ( 1 thru 4 ) from the front to the rear of the
engine. All caps should be installed so that the
stamped arrows on the caps point toward the front
of the engine.
4. Working in 1/2 turn increments, tighten the bearing
cap retaining bolts starting with the middle cap
working outward.
5. Torque the camshaft bearing cap retaining bolts to
11 N ꞏm ( 1 0 0 i n . l b s . ) .
6. Position the camshaft drive gear into the timing chain aligning the V6 mark between the two marked chain links
(Two links marked during removal) .

FILTER-ENGINE OIL
REMOVAL
All engines are equipped with a high quality full-flow,
disposable type oil filter (1). DaimlerChrysler Corpora-
tion recommends a Mopar
or equivalent oil filter be
used.
1. Position a drain pan under the oil filter.
2. Using a suitable oil filter wrench loosen filter.
3. Rotate the oil filter counterclockwise to remove it
from the cylinder block oil filter boss.
4. When filter separates from cylinder block oil filter
boss, tip gasket end upward to minimize oil spill.
Remove filter from vehicle.
NOTE: Make sure filter gasket was removed with
filter.
5. With a wiping cloth, clean the gasket sealing sur-
face of oil and grime.
INSTALLATION
1. Lightly lubricate oil filter gasket (2) with engine oil.
2. Thread filter (3) onto adapter nipple. When gasket
makes contact with sealing surface, hand tighten
filter one full turn, do not over tighten.
3. Add oil, verify crankcase oil level and start engine.
Inspect for oil leaks.

loads. Each tensioner also has a mechanical ratchet system that limits chain slack if the tensioner piston bleeds
down after engine shut down. The tensioner arms and guides also utilize nylon wear faces for low friction and long
wear. The secondary timing chains receive lubrication from a small orifice in the tensioners. This orifice is protected
from clogging by a fine mesh screen which is located on the back of the hydraulic tensioners.
STANDARD PROCEDURE
MEASURING TIMING CHAIN WEAR
NOTE: This procedure must be performed with the
timing chain cover removed.
1. Remove the timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT/CHAIN
AND SPROCKETS - REMOVAL).
2. To determine if the secondary timing chains are
worn, rotate the engine clockwise until maximum
tensioner piston (2) extension is obtained. Measure
the distance between the secondary timing chain
tensioner housing and the step ledge on the piston.
The measurement at point (A) must be less than
15mm (.5906 inches).
3. If the measurement exceeds the specification the
secondary timing chains are worn and require
replacement (Refer to 9 - ENGINE/VALVE TIMING/
TIMING BELT/CHAIN AND SPROCKETS -
REMOVAL).
SERVICE PROCEDURE - TIMING VERIFICATION
CAUTION: The 3.7L is a non free-wheeling design
engine. Therefore, correct engine timing is critical.
NOTE:Componentsreferredtoaslefthandor
right hand are as viewed from the drivers position
inside the vehicle.
NOTE: The blue link plates on the chains and the
dots on the camshaft drive sprockets may not line
up during the timing verification procedure. The
blue link plates are lined up with the sprocket dots
only when re-timing the complete timing drive.
Once the timing drive is rotated blue link-to-dot
alignment is no longer valid.
Engine base timing can be verified by the following
procedure:
1. Remove the cylinder head covers. Refer to the pro-
cedure in this section.

2. Using a mirror, locate the TDC arrow on the front cover. Rotate the crankshaft until the mark on the crankshaft
damper (2) is aligned with the TDC arrow on the front cover (2). The engine isnow at TDC.
3. Note the location of the V6 mark stamped into the camshaft drive gears (1,2). If the V6 mark on each camshaft
drive gear is at the twelve o’clock position, the engine is at TDC on the exhaust stroke. If the V6 mark on each
gear is at the six o’clock position, the engine is at TDC 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, theproblem is confined to one secondary
chain. Refer to Single camshaft timing, in this procedure.
6. If both camshaft drive gear V6 marks are at the twelve o’clock or the six o’clock position the engine base timing
is correct. Reinstall the cylinder head covers.
COUNTER BALANCE SHAFT TIMING
1. Ensure that the engine is at TDC with both cam-
shaft sprocket V6 marks in the 12 o’clock position.
2. Look down the left cylinder head chain cavity. The
timing dot (2) on the counter balance shaft drive
gear should be in the 6 o’clock position.

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).

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.