Checking and replacing the auxiliary drive belt (60,000 km) (Peugeot 406)

Elements for adjusting the tension of the auxiliary V-belt (models 1.6 and 1.8 liters without air conditioning)

Elements for adjusting the tension of the auxiliary V-belt (2.0 liter models without air conditioning)

Elements for adjusting the tension of the auxiliary V-belt (models with air conditioning)

Attention! Depending on the model and equipment installed, access to the auxiliary drive belt can be extremely limited. If more working space is required, the electronic ignition/fuel injection control must be removed (ECU).

Attention! On models with manual drive belt tension adjustment, Peugeot recommends the use of a special electronic tool (SEEM C105. 5) for fine adjustment of the drive belt tension. If this tool is not available, an approximate installation can be achieved using the method described below. When using the approximate belt tension method, the tension should be checked as soon as possible using an electronic tool.

On models equipped with a V-belt, the tension is adjusted manually on models without air conditioning and automatically on models with air conditioning.

Checking the Condition of the Auxiliary Drive Belt

1. Apply the handbrake and raise the front of the vehicle.

2. Remove the right front wheel.

3. Unscrew the screws, disconnect the brackets and remove the protective arch from under the right front fender to gain access to the crankshaft pulley bolt. Remove the front mudguard if necessary.

4. Using a socket wrench with an extension mounted on the crankshaft pulley mounting bolt, while turning the crankshaft, examine the condition of the belt for cracks, delaminations and oiling. Replace belt if necessary.

5. If the condition of the belt is satisfactory, then on models without air conditioning, check the belt tension.

Removing, installing and adjusting the tension of the auxiliary drive belt (models without air conditioning)

Removing

1. Remove the negative cable from the battery.


2. Apply the handbrake and raise the front of the vehicle.

3. Remove the right front wheel.

4. Unscrew the screws, disconnect the brackets and remove the protective arch from under the right front fender to gain access to the crankshaft pulley bolt. Remove the front mudguard if necessary.

5. Unscrew two bolts (or one) fixing the tension mechanism. (see fig. Elements for adjusting the tension of the auxiliary V-belt (models 1.6 and 1.8 liters without air conditioning) or fig. Elements for adjusting the tension of the auxiliary V-belt (2.0 liter models without air conditioning)).

6. By turning the adjusting bolt, move the tensioner pulley away from the drive belt until it is completely loose.

Installation

7. Put the drive belt on the pulleys in the following order:

• power steering pump;
• crankshaft;
• generator;
• bypass pulley (2.0 liter models):
• tension pulley.

8. Check that the belt is correctly installed on the pulleys without twisting. Remove slack in the belt by turning the belt tension adjusting bolt.

Tension

9. With insufficient tension, the belt will slip on the pulleys and make a squeak. If the belt tension is exceeded, the alternator bearings may fail.

10. The belt should be tensioned so that when the thumb is pressed on the long section of the belt, the deflection is approximately 5.0 mm.

11. To adjust the tension, unscrew the two bolts (or one) fixing the tension mechanism and, turning the adjusting bolt, move the tension pulley to the drive belt. After adjusting the belt tension, rotate the crankshaft four times and recheck the belt tension.


12. After the belt tension is adjusted, tighten the tensioner fixing bolt. Connect the negative cable to the battery.

13. Install the wheel arch under the fender, mudguard, wheel and lower the car.

Removing, installing and adjusting the tension of the auxiliary drive belt (models with air conditioning)

Removing

1. Remove the negative cable from the battery. Apply the handbrake and raise the front of the vehicle. Remove the right front wheel. Unscrew the screws, disconnect the brackets and remove the protective arch from under the right front fender to gain access to the crankshaft pulley bolt. If necessary, remove the front mudguard.

2. Move the tensioner pulley away from the drive belt using a square wrench installed in the auto tensioner bracket (see fig. Elements for adjusting the tension of the auxiliary V-belt (models with air conditioning)). Once the tension mechanism is loosened, fix this position by inserting a 4.0mm socket wrench into the hole. Remove the drive belt from all pulleys, noting the direction of rotation.

Installation and tension

3. Put the drive belt on the pulleys in the following order:

• tension pulley;
• crankshaft;
• air conditioning compressor;
• power steering pump;
• bypass pulley;
• alternator.

4. If necessary, tighten the bolts securing the automatic tensioner.

5. Check that the belt is correctly installed on the pulleys without twisting. Release the tensioner by removing the square key. The tensioner spring will ensure correct belt tension. Connect the negative cable to the battery.

6. Install the wheel arch under the fender, mudguard, wheel and lower the car.