OEM GMC Sonoma Distributor

GMC Sonoma Distributor Parts and Q&A

• Distributor Assembly
  12598210
  Q: How to overhaul the distributor on GMC Sonoma?

  A:

  To overhaul the Distributor, you first line up the white paint mark at the bottom stem of the Distributor in the pre-drilled indent hole at the bottom of the gear. Make sure that the rotor segment is properly positioned on a v6 engine ; if not, replace the Distributor. Unscrew the two screws from the rotor and remove the rotor and take note of the locating holes of the rotor screw and locator pin . Bring the square-cut hole of the vane wheel into alignment with the camshaft position (CMP) sensor and take-out the 2 screws securing the cmp sensor and dispose of it. Note the dimple under the roll pin hole on one side of the gear for orientation during assembling. Support the Distributor drive gear on a v-block or comparable fixture, then drive out the roll pin using appropriate sized punch and remove the driven gear from the Distributor shaft, including the round washer / tang washer, shim washer, and old oil seal. For assembly, align the square-cut hole of vane wheel for cmp sensor, insert the sensor into the housing plus installing two new screws for cmp sensor tight it 2.2 n.m 19 lb in. Determine the right rotor mounting position at the rotor screw hole and locator pin holes, install the Distributor rotor using the index marks and secure with two hold-down screws at 1.9 n.m (17 lb in). Place the shim washer at the bottom of the Distributor shaft and follow up with the tang washer and round washer. Mount the driven gear as per the marks of index & make sure the rotor segment is in position correctly for a v6 engine or v8 engine. Mark a white paint on the bottom stem of the Distributor, align with pre-drilled indent hole in the bottom of the gear. When the constable driven gear is put on in the wrong way, the dimple will be about 180 degrees from the rotor segment. Place the Distributor drive gear in a v-block or similar device and later fitting the roll pin by using a suitable punch and hammer and fix the driven gear. Finally, install new oil seal in the mounting flange at the bottom of Distributor base and install Distributor.