Porsche 996 TT Repair Manual page 541

5. Remove oil extraction pump and closure cap. The oil extraction pump flange must be held with a
wrench when the oil line on the pump is loosened. Subsequently unscrew the three fastening
screws of the oil extraction pump and the three fastening screws of the closure cap, then lever off
the two components.
6. Remove solenoid hydraulic valve for valve lift adjustment. To do so, remove plug, unscrew both
hexagon−head bolts M6 x 25 and remove with the holder. Subsequently remove the valve.
7. Remove camshaft housing cover. Unscrew the 15 hexagon−head bolts M6 and remove the camshaft
housing cover. If this is stuck, it can be loosened by gently tapping with a plastic hammer.
8. Check engine position. The cylinder side which is to be worked on must be positioned to
overlapping TDC so that the camshaft can be removed without tension. For cylinder bank 1 − 3, this
means: the cams of the exhaust and inlet shaft of cylinder 1 point towards each other −Figure 8.1− ,
for cylinder bank 4 − 6: the cams of the exhaust and inlet camshaft of cylinder 4 point away from
eachother (each points towards the cylinder head outer wall) −Figure 8.2− .
Figure 8.1: Overlapping TDC of cylinder 1
• − 1 − Exhaust camshaft
• − 2 − Inlet camshaft
Removing camshafts
einordnung
478