Cylinder Block Assembly: Specifications
Crankcase Vertically split light alloy cylinder housingCrankshaft Forged, supported by 8 bearings
Crankshaft bearings Plain bearings, dia 63 mm (2.48 in) Smooth bearings: Cyl. 1/3/5/7/8 Partially grooved bearings: CYL. 2/4/6
Connecting rods Forged, 1 = 140 mm
Con-rod bearings Plain bearings
Pistons Pressed light alloy
Cylinders Aluminum silicon cylinder liner surface
Cubic capacity
997 3,614 cm�
997 S 3,800 cm�
Bore
997 97.0 mm
997 S 102.0 mm
Stroke
997 81.5 mm
997 S 77.5 mm
Compression ratio
997 12.5: 1 (-0.5)
997 S 12.5: 1 (-0.6)
Through-bolt screws, Replace sealing washers
Step 1
Initial tightening 5 Nm (3.5 ftlb.)
Through-bolt screws,
Step 2
Initial tightening 12 Nm (9 ftlb.)
Step 3
Tightening torque 15 Nm (11 ftlb.)
Step 4
Torque angle 75°
Step 5
Final tightening -torque angle 75°
Supporting mount screws External Torx screw, M8 x 35
Initial tightening 5 Nm (3.5 ftlb.)
Supporting mount screws Torque angle 70°
Cross bolt connection
External Torx screw, M8 x 120
Tightening torque 33 Nm (24 ftlb.)
External Torx screw, M6
Tightening torque 13 Nm (9.5 ftlb)
Vibration damper to crankshaft M8 x 1 x 25 outer Torx
Tightening torque 60 Nm (44 ftlb.)
Connecting rod bolts M10 x 1.25 x 51; always replace
Initial tightening 20 Nm (15 ftlb.)
Torque angle 80 degrees