Vehicle Repair: Replacing an A/C Compressor Clutch Coil
The a/c compressor clutch coil inside your car is an electromagnet that attracts both the fan belt and air conditioning rotors. This will cause friction that will make the rotors spin. If the coil loses magnetism, then the air conditioning rotor will have no source of power, and it will lead to an air-con malfunction. This guide will show you how to replace an a/c compressor clutch coil in your own garage.
Difficulty level: Medium
- 15mm open-end wrench
- Pry bar
- Socket set
- New A/c compressor clutch coil
Step 1: Make sure that your car is parked on a flat surface, and the parking brake is engaged.
Step 2: Open the hood, and locate the serpentine belt tensioner. Use the wrench to pull it towards you, so you can control the tensioner in released position. Unbolt the serpentine belt tensioner with a 3x13mm socket.
Step 3: Locate the alternator mount bolts, and remove it using a 2x13mm socket. Take off the plastic cap that protects the alternator and the battery wire to see the 1x13mm nut under it. Unscrew the nut.
Step 4: Remove the alternator from the engine using the pry bar.
Step 5: Unscrew the two long bolts that hold the a/c compressor on top, and the other pair of long bolts below. Use a 16mm deep socket with a 3/8 drive so you could reach in.
Step 6: Remove the a/c compressor from its mount with the pry bar. Be very careful when you lift the compressor up. The parts are very sensitive and fragile. Watch out for the plastic coolant hose pipe near the engine block.
Step 7: Spray lubricant on the center bolt located under the compressor, and remove it. Lift the clutch up to see the other parts below it.
Step 8: Detach the clutch mechanism and the snap-ring. Lift the pulley out, so you can already see the clutch coil.
Step 9: Use a pair of pliers to remove the clutch coil. Beware when you pull the coil out because it may spring directly towards you. Do this slowly but with the right amount of pressure.
Step 10: Take the new a/c compressor clutch coil, and clip it to the guide pin located on the mount. Make sure that the coil is placed slowly so it will not spring out.
Step 11: Reinstall the snap ring and clutch mechanism back in place. Place the other parts you've detached back in their previous positions.
Step 12: Switch on the engine, and observe the a/c compressor coil if it's working properly.