Porsche 2012 911 GT3 CUP Technical Manual page 27

3.7.2. Mounting the cylinder head
3.7.3. Flywheel tightening procedure
3.7.3.1. With used flywheel:
3.7.3.2. With new flywheel:
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
1. Loosen and remove the bolts
2. Replace with new bolts part number 930.102.206.00
3. Tighten the new bolts to 30 Nm (tighten sequence diagonally
opposed)
4. Retighten bolts to 30 Nm and an additional 45° torque angle
(tighten sequence diagonally opposed).
1. Because a new flywheel 'settles' it should be mounted initially
using used bolts as described above.
2. Replace with new bolts part number 930.102.206.00
3. Tighten the new bolts to 30 Nm (tighten sequence diagonally
opposed)
4. Retighten bolts to 30 Nm and an additional 45° torque angle
(tighten sequence diagonally opposed).
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