Automatic belt tensioner. Block heater

Automatic belt tensioner

DESCRIPTION

Correct drive belt tension is required to ensure optimum performance of the belt driven engine accessories.

If specified tension is not maintained, belt slippage may cause; engine overheating, lack of power steering assist, loss of air conditioning capacity, reduced generator output rate, and greatly reduced belt life.

It is not necessary to adjust belt tension on the 4.7L, 5.2L or 5.9L engines. These engines are equipped with an automatic belt tensioner (Fig. 13) (Fig. 14). The tensioner maintains correct belt tension at all times. Due to use of this belt tensioner, do not attempt to use a belt tension gauge on 4.7L, 5.2L or 5.9L engines.

Fig. 13 Automatic Belt Tensioner-5.2L/5.9L Engines

1 - AUTOMATIC TENSIONER

2 - COIL AND BRACKET

3 - SCREW AND WASHER

Fig. 14 Automatic Belt Tensioner-4.7L Engine

1 - AUTOMATIC TENSIONER ASSEMBLY

OPERATION

The automatic belt tensioner maintains belt tension by using internal spring pressure, a pivoting arm and pulley to press against the drive belt.

Block heater

DESCRIPTION

WARNING: DO NOT OPERATE ENGINE UNLESS BLOCK HEATER CORD HAS BEEN DISCONNECTED FROM POWER SOURCE AND SECURED IN PLACE.

THE POWER CORD MUST BE SECURED IN ITS RETAINING CLIPS AND ROUTED AWAY FROM EXHAUST MANIFOLDS AND MOVING PARTS.

An optional engine block heater is available for all models. The heater is equipped with a power cord.

The cord is attached to an engine compartment component with tie-straps. The heater is mounted in a core hole of the engine cylinder block in place of a freeze plug with the heating element immersed in engine coolant.

Fig. 15 Block Heater-4.7L

1 - ENGINE BLOCK HEATER

OPERATION

The heater warms the engine providing easier engine starting and faster warm-up in low temperatures.

The power cord must be connected to a grounded 110-120 volt AC electrical outlet with a grounded, three wire extension cord, this provides the electricity to warm the heating element.