LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 2018 >> Macan Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 10 - Engine - Crankcase, Suspension -- (95B) MACAN >> WM 101802 Pressure Loss Test (MACAN Only) >> Preliminary Work

Preliminary Work

  1. Unscrew and remove all spark plugs. → 287020 REMOVING AND INSTALLING SPARK PLUGS
  2. Position cylinder to be tested to ignition TDC and remove tool (dead centre finder).
    1. 2.1. The dead centre finder or "cylinder pipe" consists of a glass tube (inspection glass) with a piston -1-  , hose and a rubber cone -2-  .
      G11980284

      Dead centre finder - "cylinder pipe" 

    2. 2.2. The rubber taper is pressed onto the spark plug hole. The inspection glass is either held by a helper → Tool setup - dead centre finder (similar illustration)  or is secured vertically in a clearly visible position with a magnet.
      G11980285

      Tool setup - dead centre finder (similar illustration) 

    3. 2.3. If the engine is now turned in direction of rotation on the crankshaft, the piston in the inspection glass is pressed up in the compression cycle → Plunger up  in order to go back down immediately upon reaching the TDC. The piston in the inspection glass stays down in overlapping TDC → Plunger down  .
      G11980286

      Plunger up 

      G11980287

      Plunger down 

scientia non olet · About LEMON Manuals