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Home >> Porsche >> 2016 >> 911 Turbo, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (1X - Engine - General -- CARRERA (997)) >> WM 1X00IN Tightening Torques - Ma.101 And Ma.102 (All Models Except 911 Turbo Coupe, 911 Turbo S Coupe, 911 Turbo CABRIO, 911 Turbo S CABRIO, Gt2 & Gt3) >> Information >> Group 15 - Cylinder Head, Valve Drive

Group 15 - Cylinder Head, Valve Drive

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Cylinder Head: 

Fig 1: Identifying Cylinder Head Screws
G09819195Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Cylinder head screw, M6 x 25 → Tightening torque: 13 Nm (9.5 ft. lb.) 
  2. Cylinder head screw, M6 x 80 → Tightening torque: 13 Nm (9.5 ft. lb.) 
  3. Cylinder head screw, internal Torx, M12 x 1.5 x 140 → Initial tightening: 5 Nm (3.5 ft. lb.)  → Tightening torque: 50 Nm (37 ft. lb.)  Loosen all screws and then tighten them again → Initial tightening: 5 Nm (3.5 ft. lb.)  → Tightening torque: 12 Nm (9 ft. lb.)  → Torque angle: 60°  → Torque angle: 60° 
  4. Cylinder head screw, external Torx, M12 x 1.5 x 140 → Initial tightening: 5 Nm (3.5 ft. lb.)  → Tightening torque: 50 Nm (37 ft. lb.)  Loosen all screws and then tighten them again → Initial tightening: 5 Nm (3.5 ft. lb.)  → Tightening torque: 12 Nm (9 ft. lb.)  → Torque angle: 60°  → Torque angle: 60° 

    Tightening sequence for cylinder head: 

    Fig 2: Cylinder Head Screw Tightening Sequence
    G09819196Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Camshafts, bearing cover: 

    Fig 3: Identifying Camshaft Bearing Covers
    G09819197Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Fastening screw on bearing cover, external Torx, M6 x 37 - observe tightening sequence → Initial tightening: 5 Nm (3.5 ft. lb.)  → Tightening torque: 5 Nm (3.5 ft. lb.)  → Torque angle: 50° 
  2. Camshaft bearing cover
  3. Dowel sleeve
  4. Bearing saddle
  5. Fastening screw, external Torx, M6 x 55 → Tightening torque: 5 Nm (3.5 ft. lb.)  → Tightening torque: 5 Nm (3.5 ft. lb.)  → Torque angle: 50° 

    Tightening sequence for camshaft bearing: 

    Fig 4: Camshaft Bearing Cover Tightening Sequence
    G09819198Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Camshafts: 

    Fig 5: Identifying Fastening Screws For Camshaft Controller/Sprocket
    G09819199Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Fastening screw, M12 x 110 (camshaft controller) → Tightening torque: 35 Nm (26 ft. lb.)  → Torque angle: 120° 
  2. Fastening screws for camshaft timing gear → Tightening torque: 30 Nm (22 ft. lb.)  → Torque angle: 70° 

Cylinder head cover: 

Fig 6: Identifying Cylinder Head Cover
G09819200Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1 - 20  - Re-tighten internal Torx screws 1 to 4 a second time → Tightening torque: 13 Nm (9.5 ft. lb.) 

Spacer for cylinder bank 4-6: 

Fig 7: Identifying Spacer For Cylinder Bank 4-6
G09819201Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Spacer
  2. Torx screw → Tightening torque: 13 Nm (9.5 ft. lb.) 
  3. Screw plug for secondary air duct → Tightening torque: 25 Nm (19 ft. lb.) 
  4. Scavenging restrictor → Tightening torque: 3 Nm (2 ft. lb.) 
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