Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Saab 9-2X F4-2.5LFACTORY OEM SERVICE PROCEDURE
System Specifications
CYLINDER HEAD
Machining Specifications
Surface warping limit:
(mating with cylinder block) 0.03 mm (0.001 in.)
Grinding limit 0.1 mm (0.004 in.)
Standard height 97.5 mm (3.84 in.)
Cylinder Head Bolts
1. Apply a coat of engine oil to washers and bolt threads.
2. Tighten all bolts to 29 Nm (3.0 kgf-m, 21.4 ft. lbs.) in alphabetical sequence. Then tighten all bolts to 69 Nm (7.0 kgf-m, 50.9 ft. lbs.) in alphabetical sequence.
3. Back off all bolts by 180° in reverse order of installation, and back them off again by 180°.
4. Tighten all bolts to 42 Nm (4.3 kgf-m, 31 ft. lbs.) in alphabetical sequence.
5. Tighten all bolts by 80° - 90° in alphabetical sequence.
6. Tighten all bolts by 40° - 45° in alphabetical sequence.
CAUTION: Tightening angle of the bolt must not exceed 45°.
7. Further tighten bolts (a) and (b) by 40° - 45°.
CAUTION: Total "re-tightening angle" of the step (6) and (7) must not exceed 90°.
Cam Sprocket
Tighten 78 Nm (8.0 kgf-m, 57.9 ft. lbs.)
Cam Bearing Torque
Temporarily tighten the bolts (a) through (d) in alphabetical sequence.
Valve Rocker Assembly
Install the valve rocker assembly.
Tighten the TORX bolts (e) through (j) in alphabetical sequence using ST.
ST 499497000 TORX PLUS
Tightening torque: 18 Nm (1.8 kgf-m, 13.3 ft. lbs.)
Tighten the bolts (k) through (r) in alphabetical sequence.
Tightening torque: 9.75 Nm (1.0 kgf-m, 7.2 ft. lbs.)
Tighten the bolts (s) and (t) in alphabetical sequence.
Tightening torque: 9.75 Nm (1.0 kgf-m, 7.2 ft. lbs.)
Exhaust Manifold
To Clylinder Head 40 Nm (4 kgf-m, 28.9 ft. lbs.)
To Exhaust Pipe 35 Nm (3.6 kgf-m, 26 ft. lbs.)
Machining Specifications
Surface warping limit:
(mating with cylinder block) 0.03 mm (0.001 in.)
Grinding limit 0.1 mm (0.004 in.)
Standard height 97.5 mm (3.84 in.)
Cylinder Head Bolts
1. Apply a coat of engine oil to washers and bolt threads.
2. Tighten all bolts to 29 Nm (3.0 kgf-m, 21.4 ft. lbs.) in alphabetical sequence. Then tighten all bolts to 69 Nm (7.0 kgf-m, 50.9 ft. lbs.) in alphabetical sequence.
3. Back off all bolts by 180° in reverse order of installation, and back them off again by 180°.
4. Tighten all bolts to 42 Nm (4.3 kgf-m, 31 ft. lbs.) in alphabetical sequence.
5. Tighten all bolts by 80° - 90° in alphabetical sequence.
6. Tighten all bolts by 40° - 45° in alphabetical sequence.
CAUTION: Tightening angle of the bolt must not exceed 45°.
7. Further tighten bolts (a) and (b) by 40° - 45°.
CAUTION: Total "re-tightening angle" of the step (6) and (7) must not exceed 90°.
Cam Sprocket
Tighten 78 Nm (8.0 kgf-m, 57.9 ft. lbs.)
Cam Bearing Torque
Temporarily tighten the bolts (a) through (d) in alphabetical sequence.
Valve Rocker Assembly
Install the valve rocker assembly.
Tighten the TORX bolts (e) through (j) in alphabetical sequence using ST.
ST 499497000 TORX PLUS
Tightening torque: 18 Nm (1.8 kgf-m, 13.3 ft. lbs.)
Tighten the bolts (k) through (r) in alphabetical sequence.
Tightening torque: 9.75 Nm (1.0 kgf-m, 7.2 ft. lbs.)
Tighten the bolts (s) and (t) in alphabetical sequence.
Tightening torque: 9.75 Nm (1.0 kgf-m, 7.2 ft. lbs.)
Exhaust Manifold
To Clylinder Head 40 Nm (4 kgf-m, 28.9 ft. lbs.)
To Exhaust Pipe 35 Nm (3.6 kgf-m, 26 ft. lbs.)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.