Timing Belt Cover Opening, 1.4L and 1.6L Models — General Description (Opel Vectra A)

The rear timing belt cover, fitted to 1991 and 1992 models with 1.4 and 1.6 litre engines, contains a small opening just above the oil pump housing. Under certain circumstances, foreign particles may be able to enter (for example gravel) through this opening, which can cause the toothed drive belt to jump on the sprockets. For this reason, it is advisable to close the opening. A cover without an opening began to be installed on models from 1993.

A special tool in the form of a rubber plug (part number 90469594) is available to close this opening. On models without power steering, this tool can be inserted into the cover opening from above. On models with power steering, the rubber can be installed in place from below. If the area is difficult to reach, especially if a ribbed drive belt is installed, it may be easier to remove the alternator/power steering pump drive belt as described in Section 5. Install the belt and adjust the tension where necessary.