Cylinder Head Mounting; Tightening Sequence - Porsche 911 GT3 Cup 2008 Technical Handbook

Cylinder head mounting:

Tightening sequence:

The following procedure must be adhered to when fitting the cylinder
head. The nut mounting faces and threads must be lightly oiled when
tightening.
1. Initial tightening to 30 Nm in accordance with tightening
sequence given below. Wait fifteen minutes before step 2.
2. Completely loosen all the nuts in reverse sequence.
3. Final tightening to 20Nm + 120° torque angle in the tightening
sequence given below.
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