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 Subaru Outback F4-2.5L SOHCFACTORY OEM SERVICE PROCEDURE
System Specifications
1. Tighten all bolts in alphabetical sequence 40 Nm (4.1 kgf-m, 29.5 ft. lbs.)
2. Retighten all bolts in alphabetical sequence 95 Nm (9.7 kgf-m, 70.1 ft. lbs.)
Caution: If the bolt make stick-slip sound during tightening, repeat the procedure from step (1). In this case, the cylinder head gasket can be reused.
3. Loosen all the bolts in reverse order of installation 180°
4. Loosen again in the same order 180°
5. Tighten all bolts in alphabetical sequence 10 Nm (1.0 kgf-m, 7.4 ft. lbs.)
6. Retighten all bolts in alphabetical sequence 30 Nm (3.1 kgf-m, 22.1 ft. lbs.)
7. Retighten all bolts in alphabetical sequence 60 Nm (6.1 kgf-m, 44.3 ft. lbs.)
8. Retighten all bolts in alphabetical sequence 80 - 90°
9. Retighten all bolts in alphabetical sequence 40 - 45°
Caution: The tightening angle of the bolt should not exceed 45°
10. Retighten bolts (a) and (b) by 40 - 45°
Caution: Make sure the total "tightening angle" of steps (9) and (10) does not exceed 90°.
2. Retighten all bolts in alphabetical sequence 95 Nm (9.7 kgf-m, 70.1 ft. lbs.)
Caution: If the bolt make stick-slip sound during tightening, repeat the procedure from step (1). In this case, the cylinder head gasket can be reused.
3. Loosen all the bolts in reverse order of installation 180°
4. Loosen again in the same order 180°
5. Tighten all bolts in alphabetical sequence 10 Nm (1.0 kgf-m, 7.4 ft. lbs.)
6. Retighten all bolts in alphabetical sequence 30 Nm (3.1 kgf-m, 22.1 ft. lbs.)
7. Retighten all bolts in alphabetical sequence 60 Nm (6.1 kgf-m, 44.3 ft. lbs.)
8. Retighten all bolts in alphabetical sequence 80 - 90°
9. Retighten all bolts in alphabetical sequence 40 - 45°
Caution: The tightening angle of the bolt should not exceed 45°
10. Retighten bolts (a) and (b) by 40 - 45°
Caution: Make sure the total "tightening angle" of steps (9) and (10) does not exceed 90°.
Factory Service Tools
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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.