Vauxhall Workshop Service and Repair Manuals

Disconnect ground cable from battery.

Disconnect wiring harness plug (1) for knock sensor.

Remove ribbed V-belt tension roller – see operation "Ribbed V-belt Tension Roller, Remove and Install".

Unclip cable for knock sensor from retaining clips at rear toothed belt cover. Unscrew upper alternator fastening bolt, only loosen lower alternator fastening bolt. Swing alternator to side – note knock sensor cable routing.

Remove knock sensor (1) from cylinder block.

Caution

The entire contact surface of the knock sensor must lie directly on the cylinder block – ensure utmost cleanliness. Do not use washers, spring washers or toothed washers. Observe tightening torque exactly.

  Install

Attach knock sensor to cylinder block – tightening torque 20 Nm / 15 lbf. ft.