Intake Air Duct: Service and Repair

Removing And Installing Cowl For Throttle Housing (Y-Shaped Pipe)

Removing cowl for throttle housing (Y-shaped pipe) - Cayenne Turbo (type M48/50)







1. Remove front engine compartment cover.







2. Pull the cover of the throttle body up and off.










3. Pull off the electrical plugs on the throttle adjuster -1- and unclip the cable. Then pull off the plug on the boost pressure sensor -2-. Twist the two fastening bolts through approx. 45 degrees in an anti-clockwise direction and pull out the bolts.







4. Loosen the hose clamps to the left and right on the bellows and pull off the bellows.







5. Pull off the Y pipe from the throttle body and pull off the hose on the Y pipe. To do this, press the button and pull off the hose.







6. Unclip lines underneath the Y pipe and remove the middle section.







7. Undo intake manifold on the air cleaner cover. To do this, turn the two fastening bolts through 180 degrees and pull the bolts out in an upward direction. Then pull out the intake manifolds.







8. Remove the air tube on the right air cleaner cover. To do this, press off the green cap. Insert a screwdriver into the notch of the cap and lever the cap off.







9. Push the circlip into the flange -1- and then pull it off together with the flange -2-.







10. Clip the green cap on again after disassembly.







11. Remove the air cleaner covers. To do so, loosen each of the two clamps -arrows- on the top side and remove the cover from the engine compartment in an upward direction.







12. Loosen the two fastening screws of the pressure pipes on the lock support.







NOTE: Depending on the routing, the electrical cable belonging to the fans may have to be disconnected on the left side and laid to one side in order to access the fastening screws of the Y pipe.

13. Disconnect the electrical plug of the hot-film mass air flow meter.







14. To do so, loosen the hose clamp on the bottom of the left hot-film mass air flow meter and remove the component from the engine compartment.







15. To do this, loosen the two hexagon socket head bolts (a/f 5) of the pressure pipes.
16. Remove the two pressure pipes from the vehicle.

Installing cowl for throttle housing (Y-shaped pipe) - Cayenne Turbo (type M48/50)







1. Insert the pressure pipe parts of the Y pipe into the charge air cooler to the left and right and tighten the two fastening screws. Tightening torque 7.5 ft.lb.







2. Install the left hot-film mass air flow meter. Position the lower hose clamp and tighten it. Then connect the electrical plug.







3. Press the control lead on the bottom of the tubular pieces into the two fastening clips.







4. Connect the cables for the electric fans and clip into the holders.







5. Tighten the holders of the tubular pieces on the lock support.







6. Install the air cleaner covers. To do this, close the two fastening clips on the top side. Push the air line onto the right air cleaner cover.







7. Press in the intake manifold on the air cleaner in the air cleaner cover. Then insert the two fastening bolts and turn them through 180 degrees.







8. Press the rubber T-piece into the plastic clip on the underside of the Y pipe. Then fit the hose at the bottom.







9. Attach the line to the underside of the Y pipe.







10. Slide the Y pipe onto the throttle body. Push in the two fastening bolts -3- and turn them clockwise through 45 degrees. Fit the electrical plug for the boost pressure sensor -2- and the electrical plug for the throttle adjuster -1-.







11. Slide the bellows onto the tubular pieces to the left and right and tighten the hose clamps.







12. Press the 4 rubber elements in the cover onto the 4 ball head supports. The mounts must be felt to engage.
13. Install front engine compartment cover.