924S, 944, 944S, 944 Turbo Model

This technical information replaces all previous instructions concerning the tightening of cylinder heads on 924S, 944, 944S and 944 Turbo vehicles.

The torque angle tightening method is now valid for all engines of types 924S, 944, 944S and 944 Turbo including all earlier engines from start of 944 production. When making repairs, the following parts must be used:

Cylinder Head Gaskets

Part Number 944 104 374 14 - 924S, 944, 944S Part Number 951 104 374 01 - 944 Turbo only

Cylinder Head Nuts (12 mm high)

Part Number 999 076 028 02 - all types

Washers

Part Number 944 104 229 00 - all types

Tightening Specifications to Torque Angle Method

Tightening is done in 3 steps:

Step 1: 20 N-m (15 ft. lbs.)
Step 2: 90 degrees (114 turn)
Step 3: 90 degrees(1/4 turn)
Important:

Sequencing must be kept for each step. Threads and bearing surfaces of nuts must be lightly lubricated with oil prior to installation. Washers must not turn while tightening. Create a reference mark if necessary.

Note:

The 12 mm high cylinder head nuts might protrude above the studs slightly on engines produced prior to Feb. 1986. In addition, new head nuts must be used at each repair.