Pacifica 2005 banda de tiempo

Trabajando en la banda de tiempo de un Chrysler Pacifica 2005 3.5L v6
TIMING BELT AND SPROCKETS
REMOVAL - TIMING BELT

TIMING VERIFICATION
Remove the outer timing covers. Rotate the crankshaft until the pointer on the crankshaft sprocket aligns the TDC mark on the oil pump. Check to determine if the camshaft sprocket timing marks are aligned with the marks on the inner timing cover. It may take an additional full revolution of the crankshaft before the camshaft sprocket marks are aligned (Fig. 169).

CAUTION: The 3.5L is NOT a freewheeling engine. Therefore, loosen the valve train rocker assemblies before servicing the timing drive.

1) Perform fuel pressure release procedure.
2) Disconnect negative battery cable.
3) Remove both cylinder head covers and loosen the rocker arm assemblies.
4) Remove the front timing belt cover.
5) Mark belt running direction, if timing belt is to be reused.

CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.

6) Rotate engine clockwise until crankshaft mark aligns with the TDC mark on oil pump housing and the camshaft sprocket timing marks are aligned with the marks on the rear cover (Fig. 169)
7) Remove the timing belt tensioner (Fig. 169) and remove timing belt.
8) Inspect the tensioner for fluid leakage.
9) Inspect the pivot and bolt for free movement, bearing grease leakage, and smooth rotation. If not rotating freely, replace the arm and pulley assembly
10) When tensioner is removed from the engine it is necessary to compress the plunger into the tensioner body
CAUTION: Index the tensioner in the vise the same way it is installed on the engine. This ensures proper pin orientation when tensioner is installed on the engine.

a) Place the tensioner into a vise and SLOWLY compress the plunger (Fig. 170). Total bleed down of tensioner should take about 5 minutes.
b) When plunger is compressed into the tensioner body install a pin through the body and plunger to retain plunger in place until tensioner is installed.

INSPECTION
TIMING VERIFICATION

Remove the outer timing covers. Rotate the crankshaft until the pointer on the crankshaft sprocket (10) (Fig. 175) aligns the TDC mark on the oil pump (9). Check to determine if the camshaft sprocket (2, 7) timing marks (1, 8) are aligned with the marks on the inner timing cover. It may take an additional full revolution of the crankshaft before the camshaft sprocket marks are aligned.

INSPECTION - TIMING BELT
1) Remove front timing belt cover.
2) Inspect both sides of the timing belt. Replace belt if any of the following conditions exist (Fig. 176):
a) Hardening of back rubber back side is glossy without resilience and leaves no indent when pressed with fingernail.
b) Cracks on rubber back.
c) Cracks or peeling of canvas.
d) Cracks on rib root.
e) Cracks on belt sides.
f) Missing teeth.
g) Abnormal wear of belt sides. The sides are normal if they are sharp as if cut by a knife.
h) Vehicle mileage or time at component maintenance requirement.
3) If none of the above conditions are seen on the belt, the front timing belt cover can be installed.

TIMING BELT - banda de tiempo instalacion

CAUTION: If camshafts have moved from the timing marks, always rotate camshaft towards the direction nearest to the timing marks (DO NOT TURN CAMSHAFTS A FULL REVOLUTION OR DAMAGE to valves and/or pistons could result).

1) Align the crankshaft sprocket (10) (Fig. 179) with the TDC mark (9) on oil pump cover.
2) Align the camshaft sprockets (2, 7) timing reference marks (1, 8) with the marks on the rear cover.
3) Install the timing belt starting at the crankshaft sprocket (10) going in a counterclockwise direction. Install the belt around the last sprocket. Maintain tension on the belt as it is positioned around the tensioner pulley (11).

NOTE: If the camshaft gears have been removed it is only necessary to have the camshaft gear retaining bolts installed to a snug torque at this time.

4) Holding the tensioner pulley (11) against the belt, install the tensioner into the housing and tighten to 28 Nm (250 inch lbs.). Each camshaft sprocket mark should remain aligned the cover marks.
5) When tensioner is in place pull retaining pin to allow the tensioner to extend to the pulley bracket.
6) Rotate crankshaft sprocket 2 revolutions and check the timing marks on the camshafts and crankshaft. The marks should line up within their respective locations. If marks do not line up, repeat procedure.

NOTE: If camshaft gears have been removed and timing is correct, counterhold and tighten the camshaft gears to final torque specification.

7) Install the front timing belt cover.
8) Tighten the rocker arm assemblies and install the cylinder head covers.
9) Connect negative battery cable.