This technical information replaces all previous instructions concerning the tightening of cylinder heads on 924 vehicles produced from 1977 to 1982 (except Turbo).

The torque angle tightening method in conjunction with the following parts is valid for all 924 naturally aspirated engines since the beginning of 1977 production.

Tightening specifications to torque angle method. Tightening is done in two steps:

Sequencing as shown must be kept for each step. Threads and bearing surfaces of bolts must be lightly lubricated with oil prior to installation. Washers must not turn while tightening. Create a reference mark if necessary. Replace head bolts at each repair. When using torque angle method, cylinder head retorque is not necessary.