Porsche 996 TT Repair Manual page 546

3. Insert camshafts. The bearing locations of the camshafts must be lightly greased before installation. Place
the timing chain over the camshafts when inserting the camshafts.
4. Position camshafts. It must be ensured that the camshafts are correctly positioned in the bearing
locations. The camshafts must be turned such that the cams of the first cylinder of the bank are
located at overlapping TDC. This means that the cams of the inlet and exhaust shaft of the first
cylinder point towards each other −Figure 4.1− , the cams of the fourth cylinder point away from
each other −Figure 4.2− .
Figure 4.1: Position of the camshafts on overlapping of cylinder 1
− 1 − Exhaust camshaft
•
• − 2 − Inlet camshaft
Figure 4.2: Position of the camshafts on overlapping of cylinder 4
• − 2 − Inlet camshaft
• − 1 − Exhaust camshaft
5. Fit bearing cover. Fit the six small bearing covers so that the bearing location numbers on the camshaft
housing and on the bearing location face each other. Make sure that the matching numbers on the bearing
covers and on the camshaft housing are identical. Position the hexagon−head bolts M6 x 30.
6. Fit thrust bearing cover. Place the large thrust bearing cover onto both camshafts and tighten the
hexagon−head bolts M6 x 30 slightly.
Installing camshafts
einordnung
483