Porsche 911 GT3 Cup 2008 Technical Handbook page 13

Set the cylinder 1 to exhaust / inlet valve overlap TDC.
Fit the special tool and, if necessary, correct the camshaft
position.
After tighten the timing chain sprockets as instructed
30 Nm + 90° torque angle.
Rotate the crankshaft 360°
Set the cylinder 4 to exhaust / inlet valve overlap TDC.
Fit the special tool and, if necessary, correct the camshaft
position.
After tighten the timing chain sprockets as instructed
30 Nm + 90° torque angle.
Attention:
Remove camshaft block before tightening.
When tightening hold the camshaft pulleys with special tool
00072196531.
Setting jig
Retaining spring, exhaust side
996.450.131.00
Retaining spring inlet side cylinder 1 – 3
Retaining spring inlet side cylinder 4 – 6
000.721.966.10
000.721.966.12
996.450.*****
996.450.*****
8