2005 ford focus zx4 ac compresser making noise when ac is turned on

SOURCE: Ford Focus

Exactly the same problem.

2000-2003 Focus vehicles may exhibit a noise from the right halfshaft support bearing.

Due to the way the driveshaft is designed there is central bearing on the the shaft. On the front drivers side it has the tendency to hum at speeds over 40mph. This is the first sign that is the bearing is going. According to Ford it can be quite common in cars of 50-60k plus. If you don't notice the hum (I didn't really) you will eventually start to get a ticking/crackling noise at speed, which will gradually get worse and take less travel time to get going. Eventually the bearing will just seize, so it is worth getting it sorted.

Unfortunately even private mechanics will have to source the bearing, which isn't cheap, so it will cost around 125-150 quid at the garage to fix. It can be a pretty fiddly job, as the whole driveshaft needs to come out (not easy in high mileage cars due to build up of grime etc), so I wouldn't attempt to replace at home unless experienced.

SOURCE: 1998 Ford Explorer timing problem

FORD: 1997-2000 EXPLORER, MOUNTAINEER
ISSUE: A "knocking" noise at start up for up to 2 minutes from the left hand front chain cassette area may occur on some vehicles. After engine shutdown, the tensioner oil supply gallery empties. The noise may be due to air entering the left hand tensioner when the engine is restarted.
ACTION: Replace the left hand camshaft tensioner with a revised Tensioner Kit. Refer to the Instruction Sheet within the Tensioner Kit for service procedure details.
WARNING: THE XU2Z-6K254-AA TENSIONER KIT IS FOR INSTALLATION ON THE LEFT SIDE OF THE ENGINE ONLY. INSTALLATION OF THIS KIT ON THE RIGHT SIDE OF THE ENGINE MAY RESULT IN ENGINE FAILURE. IF A TENSIONER IS NEEDED FOR THE RIGHT SIDE OF THE ENGINE, USE KIT XU3Z-6K254-BA.
PART NUMBER PART NAME XU2Z-6K254-AA Tensioner Kit - Left Side XU3Z-6K254-BA Tensioner Kit - Right Side

SECTION 303-01B: Engine — 4.0L SOHC 1998 Explorer/Mountaineer Workshop Manual
IN-VEHICLE REPAIR Timing Drive Components —LH Hydraulic Chain Tensioner Removal and Installation

1. Remove the upper intake manifold. For additional information, refer to Intake Manifold—Upper in this section.

1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .

1. Remove the air cleaner outlet tube (9B659); refer to Section 303-12 .

1. Remove the bolts and the accelerator control splash shield.

1. Remove the accelerator cable (9A758) and speed control actuator cable (9A825).
   1. Pull up on speed control actuator cable to remove.
   1. Rotate the throttle body cam and remove the accelerator cable from the cam.

1. Remove the screws, the accelerator cable and speed control actuator cable.

1. Disconnect the RH upper intake manifold vacuum connection.

1. Disconnect the idle air control (IAC) valve electrical connector.

1. Disconnect the TP sensor electrical connector.

1. Disconnect the engine vacuum regulator (EVR) and the variable induction system (VIS) solenoid electrical connections.

1. Disconnect the crankcase ventilation hose (6853).

1. Disconnect the power brake booster vacuum line.

1. Remove the 12 bolts.

1. NOTE: Inspect the O-rings and replace as necessary.
   Disconnect the LH fuel vapor management valve (VMV) hose.

1. NOTE: Inspect the O-rings and replace as necessary.
   Disconnect the RH VMV hose and remove the upper intake manifold.

1. Remove the thermostat housing. For additional information, refer to Section 303-03 .

1. Remove the LH camshaft tensioner.
   • If using a new washer, tighten to 44 Nm (32 lb-ft).
   • If using the old washer, tighten to 67 Nm (49 lb-ft).

1. Remove the pipe plug, and the oil volume reduction plug.

1. NOTE: Be sure to install the new oil volume reduction plug supplied with the hydraulic chain tensioner.
   To install, reverse the removal procedure.

SOURCE: Noise from ac unit on 2003 Ford Taurus. Looks like

i would suspect the clutch is going, you can purchase all the parts needed seperatly from the pump so it will be a little cheaper.

SOURCE: 2005 Ford Focus clicking noise in dashboard while driving

moisture in your distributor cap.

dry out the distributor cap..

SOURCE: I need serpentine belt diagram for 2005 ford focus

IF YOU GO TO ANY AUTO PARTS THEY WILL BE MORE THEM GLAD TO GIVE YOU THAT INFO. AUTO ZONE WILL DO THAT FOR YOU.