Drive Belt: Service and Repair
Removing and installing drive belt
Removing drive belt-Cayenne S (type M48/00)
Warning: Risk of damage!
^ Never remove drive belt when it is hot.
^ If the drive belt is removed when it is hot, it may become deformed and would be damaged.
Caution: Danger of injury!
^ The vehicle fans can continue running or start up automatically.
^ The power supply to the fans must be disconnected before starting work on the radiator fans (remove fuse).
1. Remove the front engine compartment cover.
2. Pull the cover of the throttle body vertically upwards.
3. Separate the electrical connection from the throttle adjuster. To do this, press on the plug at the top and bottom and, at the same time, pull off. Unclip the cable from the sheetmetal holder.
4. Release the fastening bolts on the throttle body. To do this, turn the bolts 45 degrees anti-clockwise. The spot on the bolts must lie as shown in the picture.
5. Remove the fastening bolts. To do this, take hold of the bolt by the rubber ring with pliers and pull it out.
6. Pull off the Y pipe from the throttle body.
7. Disconnect the air flow sensors. To do this, undo the hose clamps on the left and right on the bellows and pull the bellows off the air flow sensors.
8. Remove the hose line on the Y pipe. To do this, press button and disconnect vacuum line.
9. Mark the direction of movement of the drive belt with chalk.
10. Relieve and remove drive belt. To do this, use a wrench (a/f 30) to turn the belt tensioner clockwise and remove the drive belt from the tensioning roller. Subsequently relieve the belt tensioner slowly.
Remove drive belt from tensioning roller -8- .
11. Remove drive belt from all pulleys.
Installing drive belt-Cayenne S (type M48/00)
Note: The -following full-page diagram- illustrates the complete belt threading course. The pulleys are numbered according to the sequence of fitting.
1. Make the belt into a loop and place over the crankshaft belt pulley behind the dipstick.
2. Place the top part of the belt loop over the coolant pump pulley -1-.
3. Place the lower part of the belt loop around the crankshaft belt pulley at the bottom -2-.
4. Guide the belt section from the coolant pump around the deflector wheel -3- on cylinder bank 5-8.
5. Then guide the section of the belt around the air conditioning compressor belt pulley -4- at the bottom.
6. Then lay a loop around the power pump -5- .
7. Guide the loose end of the drive belt from the coolant pump downwards and place around the generator belt pulley -6- and deflector roller -7- of cylinder bank 1-4.
8. Gather the belt section between the deflector roller of cylinder bank 1-4 and the crankshaft belt pulley to form a loop and guide it upwards to the tensioning roller -8-. Use a wrench (a/f 30) to turn the tensioning roller -8- clockwise at the hexagon and put on the drive belt. Slowly relieve the tensioning roller.
Fitting the drive belt
9. Check whether the drive belt is correctly positioned on the pulleys.
10. Attach vacuum line to the underside of the Y pipe.
11. Slide bellows onto the air flow sensors and tighten the hose clamps.
12. Slide the Y pipe onto the throttle adjuster. Then insert the left and right fastening bolts. Turn bolts 45 degrees clockwise.
13. Connect throttle adjuster. The connector must engage audibly. Clip connecting cable into the sheetmetal holder.
14. Press the 4 rubber elements in the cover onto the 4 ball socket holders. The fastening elements must be felt to engage.
15. Install the front engine compartment cover.
Removing drive belt-Cayenne Turbo (type M48/50)
Warning: Risk of damage!
^ Never remove drive belt when it is hot.
^ If the drive belt is removed when it is hot, it may become deformed and would be damaged.
Caution: Danger of injury!
^ The vehicle fans can continue running or start up automatically.
^ The power supply to the fans must be disconnected before starting work on the radiator fans (remove fuse).
1. Remove front and side engine compartment covers.
2. Pull throttle body cover up vertically.
3. Unclip electric plug on throttle adjuster-1- and the cable. Then pull off plug on boost-pressure sensor -2- . Turn the 2 fastening bolts -3- approximately 45 degrees anti-clockwise and pull out the bolts.
View of fastening bolts
4. Pull off hose clamps on the left and right-hand sides of the bellows and pull off bellows.
5. Pull the Y pipe off the throttle body and pull off the hose line on Y pipe. To do this, press the button and disconnect the hose.
6. Unclip lines underneath the Y pipe and remove the middle piece.
7. Undo intake manifold on air filter lid. To do this, turn the 2 fastening bolts 180 degrees and pull the bolts upwards and off. Then pull out the intake manifolds.
8. Remove the air line on the right air cleaner cover. To do this, unclip the green cap. Insert a screwdriver into the notch of the cap and lever the cap off.
9. Push snap ring into flange -1- and then pull it off together with the flange -2-.
10. Clip the green cap on again after disassembly.
11. Remove air filter lid. To do this, undo the 2 fastening clips on the top side and pull the lid upwards out of the engine compartment.
12. Loosen the 2 fastening screws of the pressure pipes on the lock mount.
Note: Depending on routing, the electric cable of the fan might have to be pushed aside in order to make the fastening screws of the Y pipe accessible.
View of electric plugs
13. Separate electric plugs of hot film mass air flow metro.
14. Undo hose clamp on the underside of the left-hand hot film mass air flow metro and take the component out of the engine compartment.
15. Undo the 2 hexagon socket head bolts (SW 5) of each pressure pipe.
16. Take the 2 tubular pieces out of the vehicle.
17. Separate positive crankcase ventilation line -1- and control lead -2- of the by-pass valve at the separation points underneath the left-hand deflection roller.
View shows separation point of the positive crankcase ventilation
18. Mark the direction of movement of the drive belt with chalk.
19. Relieve and remove drive belt. To do this, use a wrench (a/f 30) to turn the belt tensioner clockwise and remove the drive belt from the tensioning roller. Subsequently relieve the belt tensioner slowly.
Removing drive belt from the tensioning roller -8- .
20. Remove drive belt from all pulleys.
Installing drive belt-Cayenne Turbo (type M48/50)
Note: The image illustrates the complete belt threading course. The pulleys are numbered according to the sequence of fitting.
1. Make the belt into a loop and place over the crankshaft belt pulley behind the dipstick.
2. Place the top part of the belt loop over the coolant pump pulley -1-.
3. Place the lower part of the belt loop around the crankshaft belt pulley at the bottom -2-.
4. Guide the belt section from the coolant pump around the deflector wheel -3- on cylinder bank 5 - 8.
5. Then guide the section of the belt around the air conditioning compressor belt pulley -4- at the bottom.
6. Then lay a loop around the power pump -5- .
7. Guide the loose end of the drive belt from the coolant pump downwards and place around the generator belt pulley -6- and deflector roller -7- of cylinder bank 1-4.
8. Gather the belt section between the deflector roller of cylinder bank 1-4 and the crankshaft belt pulley to form a loop and guide it upwards to the tensioning roller -8-. Use a wrench (a/f 30) to turn the tensioning roller -8- clockwise at the hexagon clockwise and put on the drive belt. Slowly relieve the tensioning roller.
Fitting the drive belt
9. Check whether the drive belt is correctly positioned on the pulleys.
10. Join the positive crankcase ventilation line -1- and the control lead -2- of the by-pass valve at the separation points underneath the left-hand deflection roller.
11. Insert pressure pipe components on the left and right-hand sides of the Y pipe into charge air cooler and tighten 2 fastening screws to 10 Nm (7.5 ft. lbs.).
12. Install left-hand hot film metro air flow sensor. Put bottom hose clamp into position and tighten. Then mount the electric plug.
13. Push control lead on the underside of the pipe components into the 2 fastening clips.
14. Clip electric fan cables together and into the holders.
15. Tighten pipe component holders on lock support.
16. Install air filter lids. To do this, close the 2 fastening clips on the top side. Then remove the air line on the right-hand air cleaner lid.
17. Push suction pipe on air cleaner into the air cleaner lid. Then insert the 2 fastening bolts and turn 180 degrees.
18. Push in the rubber T-piece into the plastic clip on the top side of the Y pipe. Then mount the hose line on the underside.
19. Attach the line to the underside of the Y pipe.
20. Slide the Y pipe onto the throttle body. Push the 2 fastening bolts -3- in and turn 45 degrees clockwise. Then mount the electric plug on the boost-pressure sensor -2- and the electric plug on the throttle adjuster -3- .
21. Push bellows onto the left-hand and right-hand sides of the pipe components and tighten hose clamps.
22. Press the 4 rubber elements in the cover onto the 4 ball socket holders. The fastening elements must be felt to engage.
23. Install front engine compartment cover.