How to Replace an Oxygen Sensor for a 2002 Audi A4

1. Jack up on the front of your Audi A4 under the front jack point behind the radiator, using the floor jack.
2. Place jack stands under the front pinch welds of the vehicle and lower the Audi onto the stands.
3. Climb under the vehicle and disconnect the electrical connector from the oxygen sensor.
4. Unbolt the oxygen sensor from the exhaust using an O2 sensor socket and socket wrench.
5. Remove the sensor and thread the new sensor into the exhaust. Tighten the sensor using a socket wrench and O2 sensor socket.
6. Reconnect the electrical leads to the sensor.
7. Lower the A4 to the ground using the floor jack.

Continue lendo

How to Remove the Low Beam Headlights in a 1995 530I BMW

1. Open the hood and locate the black plastic cover on the backside of the headlight housing assembly. The low beams on your BMW 530i will be covered by this black plastic cover.
2. Unplug the electrical connector from the back of the headlight.
3. Rotate the black plastic cover counter-clockwise with your fingers and pull it off of the back of the housing.
4. Rotate the square headlight collar counter-clockwise and pull the headlight out of the back of the headlight.
5. Insert a new headlight and rotate it clockwise to lock it into the housing.
6. Replace the black plastic cover and plug the electrical connector back in.

Continue lendo

How to Install an Air Max Filter in a C230

1. Pull the hood release lever next to the driver's seat. Raise the hood and prop it open with the support arm.
2. Locate the air filter box. On the C230, the air filter box is just to the left of the engine, and it is contoured so that the right side of the box hugs the left side of the engine. You can also identify it by the thick, ridged plastic tube that runs from the front of the air filter box to the intake manifold.
3. Locate the four silver metal clips around the lid of the air filter box and flip them all up. Lift the lid off the air filter box and set it aside.
4. Pull the old air filter out of the air filter box. If you're not entirely sure that you're ready for a new filter, examine the old one closely. If it looks relatively clean, you could consider putting it back in and using it for a while longer. Otherwise, discard it.
5. Place the Air Max filter in the air filter box.
6. Replace the lid to the air filter box and snap down all of the metal clips.
7. Hold the hood while you lower the support arm, then close the hood firmly.

Continue lendo

How to Change the Timing Belt on an Audi A4

1. Park the Audi on level ground.
2. Lift the front portion of the Audi using a jack and rest it on axle stands.
3. Remove the two screws from the wheel wells and the six screws from the Audi's underpan by turning a screwdriver counterclockwise.
4. Take off the two lower grilles and the bolts found near the Audi's fog lights by turning an Allen wrench counterclockwise.
5. Grab and remove the Audi's headlight washer hose, found by the driver's side lower grille. Put a bucket under the Audi's front bumper to collect any fluid that will drain out.
6. Jerk the front bumper from the Audi in an upward, then downward motion to remove it. Grab and take off the horn and headlight wiring and turn signal bulbs on either side of the Audi's front end.
7. Remove all three driver's side headlight screws and the four passenger's side headlight screws found under the headlights by turning a T45 Torx screwdriver counterclockwise.
8. Take off the two screws found above the headlights and the two screws found at the sides of the headlights by turning a T30 Torx screwdriver counterclockwise.
9. Grab and take off the lock carrier from the Audi's fan, as well as the wiring and timing belt cover, then unscrew all four bolts from the fan by turning an Allen wrench counterclockwise. Slide the fan away from the Audi.
10. Loosen the two A/C compressor bolts to take off the A/C compressor belt and jerk the spring-loaded tensioner found by the fan using a crescent wrench to reveal and remove the Audi's serpentine belt.
11. Take off the damper pulley from below the Audi's fan by unscrewing its four bolts counterclockwise using a metric wrench. Hold the damper pulley with a breaker bar. Remove the lower timing belt cover by unscrewing its three bolts.
12. Turn the damper pulley crank clockwise to line up the cam sprocket and valve cover with their marked sides. Then unscrew the three bolts that hold in the tensioner and the bolt that holds in the guide pulley. Install a new tensioner to the guide pulley. A tensioner and a new timing belt can be purchased with a timing belt kit from most auto parts shops.
13. Unscrew the guide pulley's bolt from its brass-colored portion, take off the timing belt, then place a new timing belt at the Audi's sprockets. Assemble the guide pulley with an Allen wrench, then take out the new tensioner's pin using your fingers.
14. Install all of the Audi's components back in their places by performing these steps in reverse. Remove the axle stands from the Audi to lower the vehicle.

Continue lendo

How to Turn up a Turbo

1. Purchase a twist-type manual boost controller. These in-line check valves have a spring mechanism inside which, when you twist the MBC (manual boost controller) body together, receives more pre-load to keep the valve shut longer.
2. Locate the waste gate diaphragm on the base of the turbocharger. It will look like a small flying saucer with an armature coming out of one end and a rubber vacuum line (boost sensor line) coming out of the top. Follow it back to the intake manifold or pressure tube.
3. Cut a 2-inch section from the boost sensor line. Where you make the cut isn't important; just cut where you'll have easy access for later adjustment.
4. Screw the body of your MBC counter-clockwise until the ends are hanging together by just two threads. This will release the pre-load on your spring to prevent an overboost the first time you fire the engine.
5. Slip a hose clamp over the turbo side of your sensor line and plug the MBC into the line. Some MBCs will have an arrow on the exterior to indicate the turbo side; on others you'll find 'boost' or 'turbo' printed.
6. Slip another hose clamp over the intake side of the line, and plug the line into the MBC. Tighten the hose on the turbo side hose clamp completely, but do not completely tighten the intake side.
7. Start the car and slowly raise the rpm while closely monitoring the boost gauge. At this point, it should read no higher than it did stock.
8. Hold the rpm at about 4,000 rpm while an assistant slowly screws the body of the MBC together. Keep a close eye on your boost gauge.
9. Once you have the boost set at your desired level, have your assistant tighten down the intake-side hose clamp and MBC lock nut, if so equipped.

Continue lendo

How to Fix a Rough Idle

1. Drive the vehicle to a reputable service center that has a code scanner. If your vehicle has a universal scanner jack installed under the dashboard, the technician will hook a code scanner up to it and retrieve data from any failing component or system.
2. Place the transmission in Neutral or Park. Apply the emergency brake and raise the hood. Look for any disconnected or cracked vacuum lines attached to the carburetor or intake manifold. Refer to your owner's manual for the location of the EGR vacuum hose, PVC vacuum hose and the hose leading to the brake booster diaphragm. Check all rubber vacuum lines that lead to engine compartment switching valves. Check for tight connections on any sensors, such as the electronic choke and throttle positioner.
3. Start the engine and let it warm up. Make sure the choke linkage deactivates completely upon engine warming. Use a pair of insulated plug wire pliers to pull each plug wire from the plug location. Note any drop in engine speed -- this will be normal. No drop indicates a problem with a plug wire or spark plug. Shut the engine off. Use a plug socket to remove each plug from the head.
4. Check the condition of each plug. They should be light brown or tan in color. Any plug that shows heavy encrustation (white or brown), black coloring or appears wet must be replaced. Check the gaps of the plugs using a feeler gauge. Refer to your owner's service manual for the correct plug gap. Depress the spark plug electrode down to the proper thickness of the appropriate gauge width.
5. Reinstall the plugs and start the engine. Recheck your plug wires again with the insulated pliers. Hold the spark plug end connector against the engine block. No spark indicates a bad wire. Replace the wire by disconnecting it from the spark plug tip and the coil or coil pack. Check your service manual for the proper procedure. Some plug wires connect underneath a plenum cover, or down within the valve cover.
6. Locate the idle speed and idle mixture screws on the carburetor, if so equipped. The speed screw will attach to the carburetor linkage and activate a cam. The mixture screws will sit below it and be attached to the base of the carburetor. To increase the idle speed, turn the speed screw inward (clockwise) to raise the idle. Use a screwdriver to turn the mixture screws in or out (one at a time) to achieve the highest rpm speed. Adjusting the idle speed or mixture will sometimes straighten out a rough idle.
7. Shut the engine off. Hook up the positive and negative leads of a timing light to the positive and negative leads of the vehicle battery. Attach the plug clip to the number one cylinder. See your service manual for the number one plug position on your vehicle, as well as the proper timing setting, measured in degrees.
8. Start the engine and aim the timing light at the steering damper (crankcase pulley), and read the degrees on the damper and tab marks. If the timing marks do not align, loosen the distributor base bolt with a socket and turn the distributor to achieve the correct degrees, according to your service manual specifications. If you have a vacuum advance hose leading to the distributor, disconnect it before checking the timing. Reconnect it after the timing check. Tighten the distributor base bolt with a socket.
9. Turn off the engine. Look for an in-line fuel filter on your vehicle. Refer to your service manual for its location. It could be in the engine compartment or routed under or alongside the chassis frame leading to the gas tank. Use a screwdriver to remove the hose clamps on the fuel filter. Plug both hose ends with spare bolts. Blow through the fuel filter at both ends. If obstructed, replace it with a new one. Reconnect the hoses to the new fuel filter and tighten the clamps with a screwdriver.
10. Remove the lid to the cold air intake box or air cleaner housing using a socket or unclasping the snaps. Examine the air cleaner element by holding it up against the sunlight. You should be able to see daylight through the element fibers. Tap it firmly on the pavement to remove excess dust. If the filter has oil on it, or appears clogged, replace it.
11. Hold a stethoscope over each fuel injector if you have a fuel injected system. Fuel injectors normally buzz when the engine runs. No buzzing indicates a failed injector. Hook the negative lead of a voltmeter up to an engine ground source and the positive lead up to the electrical connector on the fuel injector. Refer to your owner's service manual for the correct injector voltage. No voltage at the injector indicates a problem with the wiring or vehicle computer.
12. Locate the EGR valve on your vehicle. Consult your owner's service manual for its location. Most EGR valves connect to the intake manifold directly by use of a hose and flange attachment. Look for the plunger mechanism on the EGR valve. Have an assistant rev the engine. The plunger should activate, moving in and out. No activations means a defective or clogged EGR valve.
13. Disconnect the hose at its farthest point from the EGR valve and feel the end for exhaust gas pressure with the engine idling. No pressure indicates a problem with the valve itself or the exhaust system.

Continue lendo

How to Fill Up the Transmission for a 1999 Audi A4

1. Turn off the car and make sure that the keys are out of the ignition to ensure that the car will not be turned on while you are working on it.
2. Put the hand brake on the car and then place a large log or brick behind one of the back tires to avoid the car sliding back while you are working on it.
3. Put a jack behind one of the front tires of the Audi A4 and jack up the car about 3 feet from the ground and then slip a jack stand to hold that side of the car up. Repeat this step on the other side of the vehicle.
4. Slide in under the car and look up into the hood area of the car until you find the A4's gear box. The gear box will look like a round, metallic cylinder.
5. Slip a 17mm Allen wrench behind the gear box and unscrew the fill bolt. Slide the fill bolt out completely once it's unscrewed. If any transmission fluid drips out of the hole the fill bolt was in, then the transmission is full and doesn't need any more fluid added to it.
6. Fill up a fill bottle with transmission fluid for your 1999 Audi A4 and then inject the transmission fluid in through the hole where the fill bolt used to be until some of the transmission fluid seeps out.
7. Replace the fill bolt and tighten it with the same Allen wrench.
8. Slide out from underneath your A4 and carefully lower your car back to the ground.

Continue lendo

How to Install Rear Wheel Bearings in a Mercedes

1. Park your car on a flat, level surface. Jack your car up and put it securely on jack stands.
2. Remove the wheel and the hub by placing a screwdriver on the edge of the hub. Use a hammer and hit the hub out toward you.
3. Use an Allen wrench to loosen the retaining nut.
4. Remove two bolts that are 21 mm in size. The bolts hold the caliper on the steering knuckle. To remove the bolts use an impact wrench or 18-inch spanner. Make sure you get the right bolts. There are two others that are the same size that hold on the steering mechanism. You want to remove the bolts that hold the caliper.
5. Compress the brake pads to remove the caliper. When removing the caliper, do not kink the brake line. Hang the brake line with a coat hanger or string. Do not let the caliper dangle on the brake line.
6. Remove the outer bearing.
7. Remove the grease seal with a screw driver and hammer. Pry it out and remove the inner seal. The grease seal is destroyed during removal, so remember to use a new seal after you have replaced the inner bearing.
8. Clean out all the grease.
9. Put a new inner bearing in and put a little more grease around the bearing.
10. Put a new grease seal in place and tap down evenly. You may have to hit it hard. Use a 2-by-4 to get even force.
11. Put the outer bearing in place.
12. Put the retaining nut on the hub, and tighten it until the wheel won't turn at all. Once the wheel does not turn, loosen the nut 1/3rd of a turn. Tighten the Allen bolt to secure the nut. Make sure the wheel turns freely, but does not have any play, meaning the wheel does not wobble.
13. Clean all grease out of the wheel hub.
14. On the hub, there is a place to fill with grease. Fill it with grease to the line, but be precise and do not overfill it.
15. Replace the hub and the wheel.
16. Torque the wheel nuts to 50 foot pounds.

Continue lendo

How to Reset the Service Indicator Light on a Fiat Grande Punto

1. Turn the ignition switch to the 'On' position without starting the engine.
2. Press the odometer reset button repeatedly until the total mileage is displayed.
3. Turn the ignition switch to 'Off.'
4. Press and hold the trip odometer reset button.
5. Turn the ignition switch to 'On.' Do not start the engine.
6. Release the trip odometer reset button after the service display counts down from 10 to 0 and the service light resets.

Continue lendo

How to Take Off a BMW E36 Front Quarter Panel

1. Shut off the engine. Raise the hood of the car. For removal of the passenger side front quarter panel, locate the bolts that are on the top right side of the engine and are directly connected to the passenger side front quarter panel. For removal of the driver´s side front quarter panel, locate the bolts on the top left side of the engine, directly connected to the driver´s side front quarter panel. Use a 17 mm socket wrench to loosen and remove these bolts by turning them counterclockwise.
2. Raise the front passenger side of the car with a jack and then position a jack stand beneath the undercarriage. Ensure that the vehicle is secure on the jack stand before doing any further work.
3. Use a lug nut wrench to remove the lug nuts from the front passenger wheel. Remove the wheel and set it aside, exposing the fender well. Locate the bolts along the perimeter of the fender well; use a 17 mm socket wrench to remove these bolts, allowing you to pull off the fender well lining.
4. Locate the bolts at the top of the well that are directly connected to the quarter panel -- use a 17 mm socket wrench to remove these bolts. You will now be able to remove the quarter panel from the front of the car by hand.

Continue lendo