Compressor HVAC: Adjustments

A/C Compressor Belt Adjustment:

Deflection Method
1. Apply a force of 98 N (10 kg, 22 lb), and measure the deflection between the A/C compressor and the crankshaft pulley.

A/C Compressor Belt
Used Belt: B16A2 engine
6.0 - 9.5 mm (0.24 - 0.37 in)
Other engine
7.5 - 9.5 mm (0.30 - 0.37 in)
New Belt: B16A2 engine
4.5 - 6.5 mm (0.18 - 0.26 in)
Other engine
5.0 - 6.5 mm (0.20 - 0.26 in)

NOTE:
^ If there are cracks or any damage evident on the belt, replace it with a new one.
^ "Used belt" means a belt which has been used for five minutes or more.
^ "New belt" means a belt which has been used for less than five minutes.

2. Loosen the pivot bolt of the idler pulley bracket and the lock nut of the adjusting bolt (Nippondenso), or the center nut of the idler pulley (Sanden).
3. Turn the adjusting bolt to get proper belt tension.
4. Retighten the pivot bolt of the idler pulley bracket and the lock nut of the adjusting bolt (Nippondenso), or the center nut of the idler pulley (Sanden).
5. Recheck the deflection of the A/C compressor belt.

A/C Compressor Belt Adjustment:

Tension Gauge Method
1. Attach the special tool to the A/C compressor belt as shown below, and measure the tension of the belt.

A/C Compressor Belt
Used Belt: B16A2 engine
390 - 540N (40 - 55kg, 88 - 120 lb)
Other engines
340 - 490N (35 - 50kg, 77 - 110lb)
New Belt: B16A2 engine
740 - 880N (75 - 90kg, 170 - 200lb)
Other engine
690 - 830N (70 - 85kg, 150 - 190lb)

NOTE:
^ Follow the manufacturer's instructions for the belt tension gauge.
^ If there are cracks or any damage evident on the belt, replace it with a new one.
^ "Used belt" means a belt which has been used for five minutes or more.
^ "New belt" means a belt which has been used for less than five minutes.

2. Loosen the pivot bolt of the idler pulley bracket and the lock nut of the adjusting bolt (Nippondenso), or the center nut of the idler pulley (Sanden).
3. Turn the adjusting bolt to get proper belt tension.
4. Retighten the pivot bolt of the idler pulley bracket and the lock nut of the adjusting bolt (Nippondenso), or the center nut of the idler pulley (Sanden).
5. Recheck the tension of the A/C compressor belt.