Hyundai i20 Quiz
Engine Electrical System

ALTERNATOR Repair Procedures

In this manual: Engine Electrical System
General Information — 17Engine Mechanical System — 79Engine Electrical System — 50Emission Control System — 22Engine/Fuel Control System — 107Clutch System — 27MANUAL TRANSMISSION SYSTEM — 21Drive Shaft and Axle — 18Suspension System — 29Steering System — 21Restraint — 41Braking System — 53Body Work (Interior and Exterior) — 190Body Electrical System — 181Heating, Ventilation and Air Conditioning — 58
29steps
~179min
5/5difficulty
1special tools
02040608010041.230N·mlb·ft
Tightening torque found on this page
Done 0 of 29

DEPOSIT

  1. Turn the ignition switch to the OFF position and disconnect the negative (-) battery cable.
  2. Disconnect the alternator "B" terminal (A) after loosening the lock nut.
  3. Disconnect the alternator connector (A).
  4. Remove the coolant hose holder (B) after loosening the lock bolt.
  5. Raise the vehicle.
  6. Remove the engine undercover (A) after loosening the mounting bolts.
  7. Remove the side cover D (A) after loosening the lock bolts.
  8. Using a hex key, loosen the tensioner (A) by turning it clockwise.
  9. Remove the timing belt (B).
  10. Remove the pulley (A) after loosening the lock bolt.
  11. Remove the alternator mounting bracket (B) after loosening the lower mounting bolts.
  12. Remove the upper alternator mounting bolt (C).
  13. Remove the alternator (A).

REMEDY

  1. To install, perform the removal procedure in reverse order.
  2. After installation, adjust the alternator belt tension. (Refer to Engine Mechanical System - "Drive Belt")
  3. Install the alternator. Upper alternator mounting bolt: 29.4 ~ 41 N·m Lower alternator mounting bolt: 21.6 – 32 N·m

DISASSEMBLY

  1. Remove the rear cover (A).
  2. Remove after unscrewing the mounting screws.
  3. Remove the OAP cap (A).
  4. Using SST (09373-27000), remove the OAP pulley (A).
  5. Remove the rectifier (A) after disconnecting the stator wires.
  6. Loosen the through bolts (A).
  7. Separate the rotor (A) and housing (B).

Installation

  1. For reassembly, perform the removal procedure in reverse order.

Inspection

[Rotor]

  1. Check the continuity between the slip rings (C).
  2. Make sure there is no continuity between the slip rings and the rotor (B) or the rotor shaft (A).
  3. If either of the two rotor continuity tests is out of specification, replace the alternator.

[Stator]

  1. Make sure there is no continuity between each pair of cables (B).
  2. Make sure there is no continuity between each cable and the coil core.
  3. If either of the two coil continuity tests is out of specification, replace the alternator.

Test yourself

A quick Hyundai i20 quiz: every answer comes with an explanation and a link to the manual page.