996 Carrera Group 1 – Part 2 Engine / PAGE 19
2. Fasten cylinder heads. · Moisten cylinder-headscrews thinly
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911 Carrera (996) Engine -Cylinder head, valve drive
2. Fasten cylinder heads.
Moisten cylinder-headscrews thinly
with engine oil.
Tightening sequence of cylinder-head screws
Initial tightening or tightening to flatten
1st step: 30 Nm (23 ftlb.)
2nd step: Completely loosen cylinder head screws
Final tightening
1st step: Applicationtorque 20 Nm (15 ftlb.] in prescribed tightening
sequence
2nd step: Torque-angletightening 1 x 600 :t 20 in same sequence
3rd step: Torque-angletightening 1 x 600 :t 20 in same sequence
65~97
15 70 23 Installing cylinder head 15 -13
Printed in Germany -23, 1999 9961511
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