GM 10496871 Starter Motor, Remanufactured

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To remove and install the starter, begin by disconnecting the negative battery cable and raising the car on jackstands. Remove any starter braces or shields in the way, then remove the starter motor-to-engine bolts and allow the starter to drop down. Disconnect the solenoid wires and battery cable before removing the starter. To replace the solenoid, remove the starter from the vehicle and remove the screw and washer from the motor connector strap terminal. Remove the screws retaining the solenoid housing to the end frame assembly and twist the solenoid clockwise to remove the flange key from the keyway slot. Remove the solenoid assembly and install the new one by positioning the solenoid body on the drive housing and turning it counterclockwise to engage the flange key in the keyway slot. Install the screws to retain the solenoid housing to the end frame. For an overhaul, start by removing the starter from the vehicle and disconnecting the field coil straps from the solenoid. Remove the through-bolts to separate the commutator end frame, field frame assembly, drive housing, and armature assembly. On diesel starters, remove the insulator from the end frame and the shift lever pivot bolt. On 25 MT diesel starters, remove the center bearing screws and the drive gear housing from the armature shaft. Slide off the 2-piece thrust collar from the armature shaft and use a piece of pipe or socket to drive the retainer toward the snapring. Remove the snapring with pliers and slide off the retainer and starter drive. To reinstall, lubricate the armature shaft and install the starter drive and retainer. Place the snapring on the shaft and tap it into place. Slide the retainer and thrust collar onto the shaft and squeeze them together with pliers. Lubricate the drive housing bushing and engage the shift lever yoke with the clutch. Install the drive assembly into the drive gear housing and reassemble the remaining components. For brush replacement, disconnect the field coil from the motor solenoid terminal and remove the starter through bolts. Remove the commutator end frame and washer, then remove the field frame and armature assembly from the drive housing. Remove the brush holder pivot pin, brush springs, and brushes. Install the new brushes and reassemble the components in reverse order.

If the starter motor does not turn at all when the switch is operated, check the shift lever (automatic transmission) or clutch pedal (manual transmission). Ensure the battery is charged and all cables are secure. If the motor spins but the engine is not cranked, the starter motor may need to be disassembled. If the solenoid clicks but the motor does not operate, there may be an issue with the solenoid contacts or the motor itself. If the solenoid plunger cannot be heard, the solenoid or circuit may be defective. To check the solenoid, connect a jumper lead between the battery(+) and the S terminal. If the starter motor works, the solenoid is fine. If not, remove the starter/solenoid assembly for testing and repair. If the starter motor cranks the engine slowly, check the battery, terminal connections, and engine condition. Use a voltmeter to check the starter motor terminal while actuating the ignition switch. A reading of 9 volts or more at normal cranking speed is normal. If the reading is lower and the cranking speed is slow, the solenoid contacts may be burned.

Separate the starter from the engine.