Warning! Oil and dirt on the belt will shorten its life.
To complete the work you will need: a caliper and a household steelyard (only for 16-valve engines), key for tensioning the timing belt (see "Tools, fixtures and operating materials").
Warning! Belt tension must be checked and adjusted with the engine cold.
1. We prepare the car for work (see "Preparing the car for maintenance and repair").
2. On engines 2112, 21124 and 21114 remove engine trim (see "Decorative overlay of the engine - removal and installation").
3. Remove the front cover engine 2112, 2111, 21114 or the top of the front cover engine 21124 (see "Timing belt - replacement").
4. Remove the front right wheel (see "Wheel - replacement") and put the car on a secure stand.
5. Remove the right mudguard of the engine compartment (see "Mudguards of the engine compartment - removal and installation").
6. Rotating the crankshaft with a socket wrench at 17 or 19 mm, look at the belt.
Recommendation. When checking the timing belt, you can rotate the crankshaft in the following way. Engage fourth gear, jack up the right front side of the vehicle (see "Preparing the car for maintenance and repair"), rotate the right front wheel clockwise. This will rotate the crankshaft of the engine.
Checking on 16-valve engines
1. We hook the hook of the steelyard to the handle of the socket wrench extension. We fix the hook of the steelyard on the extension with insulating tape or tape.
2. We check the belt tension in the middle part of the branch between the camshaft pulleys. We apply the edge of the ruler to the pulleys. Through the extension, pressing on the belt with a force of 10 kgf, we measure its deflection, which should be 5.4 mm.
If the belt deflection is greater than the specified one, we tighten the belt; if the belt is too tight, we loosen its tension.
Comment.To check the condition and tension of the belt on the 2112 engine, just remove the plug from the front cover. In this case, belt deflection can be measured from the edge of the front cover. You must first measure the distance from the edge of the cover to the timing belt and take this dimension into account when measuring.
Checking on 8-valve engines
With two fingers, we try to turn the belt 90°in the area between the pulleys of the crankshaft and camshafts, applying a force of 15-20 N·m to it (15-2.0 kg cm).
If the applied force is not enough to rotate the belt to the required angle, the belt will be overstretched; if the belt can be rotated to a greater angle, it is not tight enough.
Tension adjustment
1. Key by 17 mm Loosen the tightening nut of the tension roller.
2. By turning the roller with a special key, we adjust the belt tension. Without releasing the roller, tighten the nut of its fastening (the operation is shown on the example of engine 21124, on other engines it is performed similarly).
3. Turn the engine crankshaft 2 turns and check the belt tension (see above). Repeat the adjustment if necessary.
4. Finally tighten the roller fastening nut to a torque of 33.23-41.16 N·m (3.4-4.2 kg cm)
Warning! Excessive belt tension shortens belt life and can lead to failure of coolant pump bearings, idler pulleys, and idler pulleys.
5. Install the parts in the reverse order of removal.