Torque
Cylinder Head Torque Sequence6 Cylinder M20 Tighten Sequence:
Torx Head Cylinder Head Bolts [1]
Step #1 30 Nm (22 ft lb).
Step #2 Torque Angle 90 °
Step #3 Torque Angle 90 °
[1] Install new, lightly oiled bolts.
NOTE:
An improved cylinder head bolt has been introduced for use in the M20 engine. The new head bolt, designated ASA 14, is grade 10.9 and is identified by the Torx head and a black surface finish. Whenever engine repairs necessitate cylinder head removal, all 14 old style head bolts should be replaced with the ASA 14 bolts. Further, in instances of head bolt damage (e.g. head broken off), all 14 head bolts should be replaced one by one without removing the cylinder head. The waiting and running time requirements are no longer used.
CAUTION: Under no circumstances should the old and new head bolts be mixed in one engine. Remove oil and debris from bolt holes. If not, improper values or damage may result.