Removing
Remove air intake (if needed).
Gasoline engines and 1.7L diesel engines
Loosen the lower alternator mounting bolt.
Loosen the clamping plate mounting bolt and tilt the alternator towards the engine, thus loosening the V-belt.
Remove belt.
1.7L turbodiesel engine
Loosen the alternator mounting bolts and tilt it to the side.
Remove V-belt.
Installation
Put on the V-belt.
Tension
Move the generator away from the engine with a pry bar and secure the tension bar.
Check V-belt tension, adjust if necessary.
Tension check
Attention! In workshops, a special Opel KM-128-A tool is used to check the belt tension. If there is no such device, it is impossible to accurately adjust and check the belt tension, since the new belt must have a large pre-tension. The correct tension of the V-belt significantly increases the service life of the V-belt.
In the absence of the above device, the belt tension can be checked with the thumb by pressing it in the middle between the pulleys. The belt should sag about 5 mm. However, despite this check, at the next scheduled maintenance, it is necessary to check the belt tension with a tool, as incorrect tension can lead to belt slippage.
Set the tester so that the belt passes between the guides A, B and C (see fig.).
Press lever A until pin D touches the V-belt. When touched, a beep sounds.
Read the tension value from the gauge and multiply it by 100. This value corresponds to the belt tension in newtons. It should be 250-400 N.
Attention! When installing a new belt, tension it to a value of 450 N.
If the belt tension is outside the specified limits, it must be corrected.
Install the air intake hose, if removed.
For petrol engines and diesel engines with a volume of 1.7 liters: Tighten the alternator mounting bolts. Tightening torque for M8 bolts - 25 Nm, for M10 bolts - 50 Nm.
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