Fuel Delivery and Air Induction: Testing and Inspection
CHECKING INTAKE SYSTEM FOR FREEDOM FROM LEAKS1. Remove complete air cleaner assembly.
2. Remove hot wire air mass sensor.
3. Remove protective grille.
4. Using M 4 x 40 screws, attach sealing plate 926411 to hot wire air mass sensor.
NOTE: Before tightening the screw to the final torque setting, check positioning of hot wire air mass sensor on the sealing plate, i.e. no air gap must be visible anywhere when a visual check is made.
5. Build up a pressure of approx. 0.5 bar. After the pressure has been built up, air escaping from larger leaks is clearly audible. Smaller leaks may be located by spraying the potential leak areas with leak tracer spray.