Drive Belts, Mounts, Brackets and Accessories: Description and Operation

Accessory Drive

Vehicles with supercharger








Crankshaft Pulley
The combined crankshaft pulley and torsional vibration damper drives a single, six ribbed vee belt. The belt drives all of the engine-mounted accessories such as the generator, the power assisted steering pump, the air-conditioning compressor and the coolant water pump.

Air Conditioning Compressor Pulley
This is positioned at the lowest point of the front-end accessory drive on the left-hand side accessory mounting.

Power Assisted Steering Pump Pulley
The power assisted steering pump pulley is located on the left-hand side, above the air conditioning compressor.

Generator Pulley
The generator is fitted on the right-hand accessory mounting.

Supercharger Pulley
The supercharger is located between the left-hand and right-hand cylinders and retained at three mounting points.

Accessory drive belt tensioner and supercharger belt tensioner
The accessory drive belt tensioner and supercharger belt tensioner is calibrated to provide the correct amount of tension to the belt for a given drive system. Unless a spring within the tensioner assembly breaks, or some other mechanical part of the tensioner fails, there is no need to check the tensioner for correct tension.

Accessory drive belt and supercharger belt








The accessory drive belt and the supercharger belt should be inspected at every routine service for excessive wear and damage. A drive belt which displays symptoms of cracking may be perfectly fit for further service.

Should cracking be detected, serviceability may be assessed using the following guidelines:

^ Fifteen cracks per rib over a 100 mm length of drive belt is acceptable.
^ Section(s) of belt missing from any rib is not acceptable and the drive belt must be renewed.

Accessory drive belt tensioner





The accessory drive belt tensioner consists of an idler pulley which is free to rotate on a bearing, located at the end of a spring-loaded pivot arm. The pivot arm can be turned counter-clockwise (viewed from the front of the engine) for accessory drive belt removal and installation.

The accessory drive belt wear indicators are incorporated on the bottom of the accessory drive belt tensioner. When the indicators are aligned the accessory drive belt requires replacing.