Cylinder Head Tightening Sequence and Torque Specifications
Head stud torque specifications and tightening sequence for all 8V and 16V 944/924S/968 engines, with the stud tightening diagram and instructions for angle-tightened assemblies.
General
When following the torque sequences below, wait approximately 15 minutes between torque steps to allow the studs to stretch and fully settle before the next torque application.
Tighten the head studs in a crosswise pattern, working from the centre of the head outward, so the gasket is clamped evenly. (Removal is the reverse: loosen crosswise from the outside inward.)
Head-stud tightening sequence, 8-valve engines (factory fig. 15-10): begin at the two centre studs (1, 2) and work outward in a crosswise pattern. The car symbol marks the front of the engine.
Note: The 16V tightening sequence differs slightly from the 8V sequence. Refer to the 16V Cylinder Head and Head Gasket Removal and Installation procedure for the correct 16V sequence.
Head Stud Torque Specifications
| Vehicle | Engine Designator | Step 1 | Step 2 | Step 3 |
|---|---|---|---|---|
| 944 (1983–1985.5) | M44 01–04 | 20 N·m15 ft·lb | 50 N·m37 ft·lb | 90 N·m66 ft·lb |
| 944 (1985.5–1987), 924S (1986–1987) | M44 05–08 | 20 N·m15 ft·lb | 50 N·m37 ft·lb | 90 N·m66 ft·lb |
| 944 (1985.5–1988), 924S (1986–1988) — with 12 mm high nuts | M44 05–10 | 20 N·m15 ft·lb | 90° angle | 90° angle |
| 944 (1989) | M44 11–12 | 20 N·m15 ft·lb | 60° angle | 60° angle |
| 944 Turbo (1986–1989) | M44 51–52 | 20 N·m15 ft·lb | 90° angle | 90° angle |
| 944S (1987–1988) | M44 40 | 20 N·m15 ft·lb | 90° angle | 90° angle |
| 944S2 (1989–1991), 968 (1992–1993), 968 CS (1993) | M44 41, 43, 44 | 20 N·m15 ft·lb | 60° angle | 90° angle |