Remove the negative battery cable from the battery, take off the large bolt on the front of the crankshaft and remove the drivebelt pulley. Remove the screws or bolts to unbolt the outer timing belt cover and follow up by loosening the auxiliary shaft sprocket bolt. Remove the timing belt if the shaft rotates. Insert a large screwdriver or a 3/8-inch drive extension into one of the holes in the sprocket to lock it up. Remove the sprocket with a puller if necessary then remove the pin from the shaft. After that, disconnect the auxiliary shaft cover by detaching three screws, and remove the screws to disengage the retaining plate. Use a bolt and washer along with a prybar and spacer block if the shaft is tight in order to withdraw it without damaging the bearings. Check the auxiliary shaft bearing for pits and score marks. If you notice any, replacement should be done by a dealer service department or repair shop. Installing a new bearing requires special tools. Examine the bearing journal or eccentric for wear and the gear teeth for wear and damage. If wear or damage is evident, the shaft must be replaced. Prior to installation into the block, it should be dipped in engine oil and lightly tapped into place with a soft-face hammer. Place the retaining plate and the auxiliary shaft cover, then reverse the removal steps in order. It is essential to have the auxiliary shaft pin in place before putting on the sprocket. Tighten the sprocket mounting bolt to the specified torque.