Preliminary Work - Cylinder Bank 4-6

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CAUTION: Ingress of dirt

Danger of material damage due to blocked oil bores/oil ducts.

→ Absolute cleanliness is essential when working on the engine.

→ Lay removed engine parts on a clean base and make sure to cover them.

→ Use the cover for dust protection when fitting the engine NR.165 on the engine assembly support.

Information

Specifications for wrench sizes (a/f specifications) for screw heads are described as follows:

Torx screws: (E..) for external Torx, (T..) for internal Torx.
Hexagon-head bolts (internal and external hexagon): Wrench size (a/f)

Complete Steps 1 to 9 as for cylinder bank 1-3.
Remove oil return line -1- .
1. 2.1. Loosen the clamp -2- and screw off hexagon nut (a/f 36) -arrow- on the connection for the oil suction pump by countering at the hexagon connection piece (a/f 32).
2. 2.2. Pull off cable plug on the oil-level sender.
3. 2.3. Disconnect line at the oil tank.
  
  Fig 1: Identifying Oil Return Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove oil tank.
→ 175219 REMOVING AND INSTALLING OIL TANK .
Disconnect cable plugs for bar ignition modules and hall sender and remove bar ignition modules -1- .
1. 4.1. Pull off cable plugs for hall sender and bar ignition modules -2- .
2. 4.2. Unscrew internal Torx screws (T30, M6 x 16) -3- on the bar ignition modules.
3. 4.3. Pull off bar ignition modules.
4. 4.4. Unscrew external Torx screw (E10, M6 x 12) on the ground cable.
  
  Fig 2: Identifying Bar Ignition Module Screws
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove covers -1 and 3- on the camshaft housing.
1. 5.1. Unscrew three external Torx screws (E10, M6 x 20) -2- on the top cover and remove cover.
2. 5.2. Unscrew three external Torx screws (E10) - one M6 x 20 -2- and two M6 x 30 -4- - on the bottom cover (oil return connection).
  
  Fig 3: Identifying Camshaft-Housing Covers
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Pull off oil pipe -1- for the oil suction pump.
1. 6.1. Pull off bottom cover.
2. 6.2. Replace O-rings -arrows- .
  
  Fig 4: Identifying Oil Suction Pipe
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Replace O-rings on both covers.