Installing Resonance Tube

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Pre-position resonance tube between intake-air distributors.
1. 1.1. On the 3.8-Liter engine connect a vacuum line and a cable plug onto the control valve of the tuning flap.
Fit rubber sleeves on both sides.
1. 2.1. Lightly spray resonance tube and intake distributors at the seat of the rubber sleeve with silicone spray.
2. 2.2. Position rubber sleeves on the upper side between the resonance tube and the intake-air distributor with the stop bead.
3. 2.3. To ensure that the rubber sleeves are seated correctly all around, pull them through 360 degrees along the contour of the resonance tube.
  IMPORTANT: the stop bead must be seated between the resonance tube and intake distributor.
Insert lower halves of clamps with the connecting hooks pointing in the direction of travel and wedge them into the particular sleeve groove.
1. 3.1. To do this, pull up the clamp half at the front and rear at the same time until it is seated automatically.
Engage the eye of the upper halves of the clamps -1- in the connecting hooks and fix in place at the rear (in direction of travel) using new M6 x 35 countersunk screws -2- .

Fig 1: Securing Resonance Tube
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check that the resonance tube and the rubber sleeves are seated correctly.
1. 5.1. Screw down both screws to the prescribed torque.
Connect positive crankcase ventilation lines -2 and 3- and tank vent connection -1- onto resonance tube.

Fig 2: Identifying Positive Crankcase Ventilation And Tank Vent Line
Courtesy of PORSCHE CARS NORTH AMERICA, INC.