Block heater. Accessory drive belt-5.2L/5.9L engine

Block heater

REMOVAL

(1) Disconnect negative battery cable from battery.

(2) Drain coolant from radiator and cylinder block.

Refer to Draining Cooling System in this group.

(3) Remove power cord from block heater (Fig. 55).

(4) Loosen screw at center of block heater. Remove heater assembly and o-ring seal.

INSTALLATION

(1) Thoroughly clean cylinder block core hole and block heater seat.

(2) (all except 4.7L Engine). Position o-ring seal on heater then insert block heater assembly with element loop pointing down (Fig. 55).

(3) 4.7L Engine Only, Insert block heater assembly with element loop pointing upward (12 O'clock) (Fig. 56).

(4) With block heater fully seated, tighten center screw to 2 N*m (17 in. lbs.) torque.

(5) Fill cooling system with recommended coolant.

Refer to Filling Cooling System section in this group.

(6) Start and warm the engine. Check for leaks.

Accessory drive belt-5.2L/5.9L engine

REMOVAL

Drive belts on 5.2L/5.9L engines are equipped with a spring loaded automatic belt tensioner (Fig. 57).

This belt tensioner will be used on all belt configurations, such as with or without power steering or air conditioning. For more information, refer to Automatic Belt Tensioner-5.2L/5.9L Engine, in this section.

Fig. 55 Block Heater Removal/Installation-5.2L/5.9L

1 - BLOCK HEATER POWER CORD

2 - POWER CORD ROUTING CLIP (2)

3 - FREEZE PLUG

4 - O-RING SEAL

5 - BLOCK HEATER

Fig. 56 Engine Block Heater-4.7L

Fig. 57 Automatic Belt Tensioner-Belt Removal/ Installation

1 - IDLER PULLEY

2 - TENSIONER

3 - FAN BLADE

(1) Attach a socket/wrench to pulley mounting bolt of automatic tensioner (Fig. 57).

(2) Rotate tensioner assembly clockwise (as viewed from front) until tension has been relieved from belt.

(3) Remove belt from idler pulley first.

(4) Remove belt from vehicle.

INSTALLATION

CAUTION: When installing serpentine accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to (Fig. 58) for correct engine belt routing. The correct belt with correct length must be used.

(1) Position drive belt over all pulleys except idler pulley. This pulley is located between generator and A/C compressor.

(2) Attach a socket/wrench to pulley mounting bolt of automatic tensioner (Fig. 57).

(3) Rotate socket/wrench clockwise. Place belt over idler pulley. Let tensioner rotate back into place.

Remove wrench. Be sure belt is properly seated on all pulleys.

(4) Check belt indexing marks. Refer to Automatic Belt Tensioner-5.2L/5.9L for more belt information.

Fig. 58 Belt Routing-5.2L/5.9L Engine

1 - TENSIONER

2 - GENERATOR PULLEY

3 - IDLER PULLEY

4 - A/C COMPRESSOR PULLEY

5 - WATER PUMP PULLEY

6 - POWER STEERING PUMP PULLEY

7 - CRANKSHAFT PULLEY

The tensioner is equipped with an indexing arrow on back of tensioner and an indexing mark on tensioner housing. If a new belt is being installed, arrow must be within approximately 3 mm (1/8 in.) of indexing mark. Belt is considered new if it has been used 15 minutes or less. If this specification cannot be met, check for:

• The wrong belt being installed (incorrect length/ width)
• Worn bearings on an engine accessory (A/C compressor, power steering pump, water pump, idler pulley or generator)
• A pulley on an engine accessory being loose
• Misalignment of an engine accessory
• Belt incorrectly routed. Refer to (Fig. 58)