Porsche 911 GT3R 2010 Technical Manual page 26

3.8.2. Mounting the cylinder head
3.8.3. Set valve timing
3.8.3.1. Special tools
The following procedure should be adhered to when mounting the cylinder
head:
1. Lightly oil the threads and mating faces
2. Tighten the bolts initially to 30 Nm in the following sequence,
and then wait 15 minutes
3. Completely loosen the bolts in the reverse sequence
4. Initially tighten the bolts to 20 Nm, before finally tightening to
120° torque angle
Porsche Motorsport recommends use of the following special tools to
adjust and set the valve timing of the 911 GT3 Cup
Base plate cylinder 1:
Base plate cylinder 2:
Guide element intake:
Guide element exhaust:
Degree wheel crankshaft:
Chain tensioner:
Setting jig TDC:
Retaining key timing chain sprocket:
996.721.549.90
996.721.550.90
996.721.551.9A
996.721.551.93
996.450.131.00
000.721.940.10
996.721.511.91
996.721.513.90
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