Cylinder bank 4 - 6

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NOTE:

The sealing surfaces of the cylinder heads and the cylinder head covers must be cleaned before the new sealant is applied. Avoid damage!

Clean sealing surfaces. Remove any sealant residue from the sealing surfaces on the cylinder head and the cylinder head cover thoroughly with a steel brush. Then rub down with a clean cloth soaked in a degreasing agent (e.g. acetone, solvent naphtha). Make sure that no sealant residue can enter the cylinder head.
Replace the 3 seals for the spark-plug recesses.
Insert 2 magnetic hydraulic valves and 3 seals for the spark-plug recesses. Fit new O-rings into both the magnetic hydraulic valves and insert into the bores in the cylinder head. (Camshaft adjustment with dowel pin, valve lift control without dowel pin). Replace the 3 seals for the spark-plug recesses.

Fig 1: Inserting 2 Magnetic Hydraulic Valves And 3 Seals For Spark-Plug Recesses
Courtesy of PORSCHE OF NORTH AMERICA, INC.

Only the following sealants may be used to seal the cylinder head cover:
- Drei Bond Silikon - type 1209 (beige)
- Loctite 5900 (black)
Fit cylinder head cover. Apply a thin bead of sealant on the cylinder head cover (as shown in Fig 2). The bead should not be higher than 1.5 mm.

Fig 2: Applying Thin Bead Of Sealant On Cylinder Head Cover
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Position the 20 hexagon-head bolts M6x30 on the cylinder head cover and 2 hexagon-head bolts M6x20 on the oil extraction pump.
NOTE:
- If the O-ring of the oil extraction pump needs to be replaced, insert the pump after fastening the cylinder head cover and then position the 4 hexagon-head bolts M6x20.
Tighten the 20 hexagon-head bolts in the specified tightening sequence with a torque wrench with 13 Nm (9.5 ftlb.).

Fig 3: Cylinder Head Cover Bolt Tightening Sequence (Cylinder Bank 4-6)
Courtesy of PORSCHE OF NORTH AMERICA, INC.

Tightening torque: 13 Nm (9.5 ftlb.)
Tighten the 2 or 4 hexagon-head bolts M6x20 of the oil extraction pump with a torque wrench with 13 Nm (9.5 ftlb.).
Tightening torque: 13 Nm (9.5 ftlb.)
Position a new, dry, brown closure cap "PHI" 45 mm on the bore of the exhaust camshaft on the belt pulley side and tap it gently into place with a plastic hammer.
Insert 2 green closure caps into the small bores on the clutch side. Position the dry, new closure caps and tap gently into place with a plastic hammer.
Fit 2 new covers for the magnetic hydraulic valves.

Fig 4: Identifying 2 New Covers For Magnetic Hydraulic Valves
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fit the holders for the magnetic hydraulic valves. Position 4 hexagon socket head bolts M6x20 and tighten with a tightening torque of 10 Nm (7.5 ftlb.).

Fig 5: Identifying Holders For Magnetic Hydraulic Valves
Courtesy of PORSCHE OF NORTH AMERICA, INC.
- A: Holder for camshaft adjustment valve (NVS)
- B: Holder for valve lift adjustment valve (VVS)
Fit ignition coils. Insert 3 ignition coils into the spark-plug recesses. Position 2 hexagon socket head bolts M6x25 per ignition coil and tighten with a torque wrench with 10 Nm (7.5 ftlb.).
Tightening torque: 10 Nm (7.5 ftlb.)
Fit holder for the main muffler. Position 4 hexagon-head bolts: top 2 M8x30, bottom 2 M8x25, then tighten with a torque wrench with 23 Nm (17 ftlb.). Connect the electrical plug of ignition coil cyl. 5 and the 2 electrical plugs of the magnetic hydraulic valves. Clamp the cables of the hydraulic valves in the sheetmetal brackets.
Tightening torque: 23 Nm (17 ftlb.)
Install the shield. Insert the shield, position and tighten the 2 hexagon-head bolts M6x16.
Connect the 2 cable plugs on the oil temperature switch.
Fit the ground cable on the cylinder head. Tighten the hexagon-head bolt M8 with a torque wrench with 23 Nm (17 ftlb.).
Tightening torque: 23 Nm (17 ftlb.)