Removing Air Box For Throttle Housing (Y-Shaped Pipe Ahead Of Throttle Valve): Notes

Naturally aspirated engines => 

1. On naturally aspirated engine: Loosen the screw-type clamps and pull off intake pipes and Y-shaped pipe -3, 1 or 2 -  .
   Fig 1: Identifying Intake Pipes

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   Turbo engines => 

2. Disconnect connector -1-  for boost pressure sensor.
   Fig 2: Identifying Boost Pressure Sensor

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3. Lever off clip under the Y-pipe using a screwdriver.

1. Release both locking pins on the Y-shaped pipe in a clockwise direction and pull them off. Pull Y-shaped pipe off the throttle housing.
   Fig 3: Identifying Turbo Pressure Pipes

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   1. 1  - Pressure pipe
   2. 2  - Y-shaped pipe
   3. 4  - PCV line (positive crankcase ventilation); hose connector fitted in check valve or Y-shaped pipe, depending on equipment => Important! Only loosen connections if you intend to replace them and replace clamps!  Set components down with the ventilation pipes and lines connected.
   4. 5  - Control line for ambient air line
   1. 1.1. Either release the clips on the plug-in connection -1-  for the charge air cooler if necessary and pull the pressure pipes off the charge-air cooler. Turn the Y-shaped pipe with pressure pipes fitted around and detach the control line -5-  , which is clipped on.
   2. 1.2. Or loosen the screw-type clamps between the Y-shaped pipe and pressure pipes and turn the Y-shaped pipe around and detach the control line -5-  , which is clipped on.