GM 91172595
Distributor Assembly

The Distributor replacement process requires disconnecting both the negative (-) Battery Cable and Distributor electrical connector. Two screws hold the Distributor Cap in place so remove them before removing the cap. Use a marker to note the Distributor housing location on the cylinder head before removing the two Distributor flange bolts and housing component from this surface. Begin by marking the Distributor coupling position on the Distributor housing then inspect the Distributor Cap and rotor for cracks, terminal corrosion, or wear before replacing any damaged parts. Use j 22794 Spark Plug port adaptor (J 22794) to set the Distributor position if any orientation becomes lost. To reach top dead center (TDC) on the compression stroke of cylinder number 1 you must remove the fi fuse from the fuse and relay box along with removing the number 1 Spark Plug before installing the j 22794 Spark Plug port adaptor and compression gauge in the Spark Plug cavity. Check the compression reading on the gauge because tdc marks its peak point. Begin by aligning the Crankshaft Pulley timing mark with the timing indicator zero (0) position while the rotor faces the number 1 cylinder. Then install the Distributor. Reinstall the number 1 Spark Plug with a torque of 28 n.m (21 lb ft) while the j 22794 Spark Plug port adaptor and compression gauge have been properly removed. Reinstall the fi fuse into the fuse and relay box while setting the ignition timing. The Distributor housing installation requires the (1,3) Distributor coupling marks to align for proper distribution housing placement onto the cylinder head. Keep the Distributor marks as they were set during removal. First place the Distributor flange bolts in place without applying complete torque followed by installing a new Distributor Cap seal to the Distributor Cap and fastening the cap with its two screws. Perform the following installation steps before reconnecting the negative (-) Battery Cable. Tighten the negative (-) Battery Cable-to-negative (-) battery terminal retainer to 15 n.m (11 lb ft). Complete ignition timing calibration for the 1.0l power unit.

In order to service and repair the Distributor, one should proceed and check out the resistance of camshaft position (CMP) sensor between its two terminals in the Distributor connector with the aid of the digital multimeter (J 39200); replace the cmp sensor if the resistance is outside the will specify range of 185-325 ohms. Then you should withdraw the Distributor rotor from the Distributor housing, remove the cmp sensor cover from the cmp sensor and then opened the two screws that hold the cmp sensor in place on the Distributor housing. If need be, take off the two Distributor flange bolts and the Distributor housing of the Cylinder Head. Check the corrosion and wear on the Distributor housing, the end play of the shaft, and the signal rotor for damage; if the defects are located, change the Distributor housing assembly. Also check the rotor for wear or crack, Distributor cap for carbon tracking, arcing or crack, and Distributor shaft o-ring seal is worn around tear, changing any component if required. Installation starts with installing the cmp sensor to the Distributor housing and tightening it using two screws without full tightening. Then install the cmp sensor cover to the cmp sensor and align the signal rotor ridge with the ridge on the cmp sensor by rotating the signal rotor. Adjust the air gap of the signal rotor (0.2 - 0.4 mm, 0.008-0.016 in) by shifting cmp sensor relative to signal rotor and tighten cmp sensor retaining screws to 5 n.m (44 lb in). As for cranking the engine after the Distributor was removed, make sure to replace it as required. Mount the Distributor rotor onto the Distributor housing proceed to mount the Distributor housing onto the Cylinder Head and align the marks made during the earlier steps and mount the two Distributor flange bolts loosely. Then, install the new Distributor Cap seal on the Distributor Cap and fasten the cap with two screws and join the Distributor electrical connector. Lastly, adjust the ignition timing of 1.0l engine as needed.