Crankshaft main bearings. Oil pan 4x2 vehicle

Crankshaft main bearings

CRANKSHAFT MAIN BEARING SELECTION

The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft position sensor target wheel has grade identification marks stamped into it (Fig. 104). These marks are read from left to right, corresponding with journal number 1, 2, 3, 4 and 5. The crankshaft position sensor target wheel is mounted to the number 8 counter weight on the crankshaft.

NOTE: Service main bearings color coded. These color codes identify what size (grade) the bearing is.

CHECKING CRANKSHAFT END PLAY

(1) Mount a dial indicator to a stationary point at front of engine. Locate the probe perpendicular against nose of crankshaft (Fig. 105).

(2) Move the crankshaft all the way to the rear of it's travel.

(3) Zero the dial indicator.

(4) Move the crankshaft all the way to the front of it's travel and read the dial indicator. Refer to Crankshaft End Play Specification Chart.

Oil pan 4x2 vehicle

REMOVAL

(1) Drain the cooling system. Refer to COOLING SYSTEM.

(2) Remove the upper fan shroud. Refer to procedure in this section.

(3) Remove the throttle body resonator and air inlet hose.

(4) Remove the intake manifold. Refer to procedure in this section.

(5) Raise vehicle on hoist.

(6) Disconnect exhaust pipe at exhaust manifolds.

Refer to EXHAUST SYSTEM.

(7) Remove the structural dust cover (Fig. 106).

Refer to procedure in this section.

(8) Drain engine oil and remove oil filter.

(9) Position suitable jack under engine.

Fig. 101 Timing Chain to Sprocket Alignment

1 - LEFT CYLINDER HEAD

2 - RIGHT CYLINDER HEAD

Fig. 102 Camshaft Sprocket Installation

1 - ADJUSTABLE PLIERS

2 - CAMSHAFT DOWEL

(10) Remove both left and right side engine mount through bolts (Fig. 107).

Fig. 103 Tightening Right Side Cam Sprocket Retaining Bolt

1 - TORQUE WRENCH

2 - SPECIAL TOOL 6958 WITH ADAPTER PINS 8346

3 - LEFT CAMSHAFT SPROCKET

4 - RIGHT CAMSHAFT SPROCKET

(11) Raise engine to provide clearance to remove oil pan.

Fig. 104 Main Bearing Markings on Target Wheel

1 - REARMOST CRANKSHAFT COUNTER WEIGHT

2 - TARGET WHEEL

3 - MAIN BEARING SELECT FIT MARKINGS

MAIN BEARING SELECTION CHART-4.7L

Fig. 105 Checking Crankshaft End Play-Typical

(12) Place blocks of wood between engine brackets and lower mounts to provide stability to engine.

NOTE: Do not pry on oil pan or oil pan gasket.

Gasket is mounted to engine and does not come out with oil pan. (13) Remove the oil pan mounting bolts and oil pan (Fig. 108).

(14) Unbolt oil pump pickup tube and remove tube and oil pan gasket from engine.

CRANKSHAFT END PLAY SPECIFICATION CHART

Fig. 106 Structural Dust Cover Removal / Installation

INSTALLATION

(1) Clean the oil pan gasket mating surface of the bedplate and oil pan.

(2) Position the oil pan gasket and pickup tube with new o-ring. Install the mounting bolt and nuts.

Tighten bolt and nuts to 28 N*m (20 ft. lbs.).

(3) Position the oil pan and install the mounting bolts. Tighten the mounting bolts to 15 N*m (11 ft.

lbs.) in the sequence shown (Fig. 108).

(4) Raise the engine and remove the blocks of wood.

Fig. 107 Engine Mount Through Bolt and Nut Removal / Installation

1 - LOCKNUT AND WASHER

2 - ENGINE MOUNT/INSULATOR

3 - THROUGH BOLT

4 - FRAME

Fig. 108 Oil Pan Mounting Bolts and Oil Pan

(5) Lower engine and install both the left and right side engine mount through bolts (Fig. 107).

Tighten the nuts to 68 N*m (50 ft. lbs.).

(6) Remove jack and install oil filter.

(7) Install structural dust cover.

(8) Install exhaust pipe onto exhaust manifolds.

(9) Lower vehicle.

(10) Install intake manifold.

(11) Install throttle body resonator and air inlet hose.

(12) Install upper fan shroud.

(13) Fill cooling system.

(14) Fill engine oil.

(15) Start engine and check for leaks.