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.
2009 Toyota Yaris L4-1.5L (1NZ-FE)FACTORY OEM SERVICE PROCEDURE
Cylinder Head
CYLINDER HEAD SUB-ASSEMBLY
Using several steps, install and tighten the 10 cylinder head bolts and plate washers uniformly with an 8 mm bi-hexagon wrench in the sequence shown in the illustration.
Torque 29 Nm (300 kgf-cm, 22 ft-lbf)
Mark the front of the cylinder head bolt with paint.
Retighten the cylinder head bolts by 90° and then an additional 90° as shown in the illustration.
Check that the paint mark is now at a 180° angle from the front
Using several steps, install and tighten the 10 cylinder head bolts and plate washers uniformly with an 8 mm bi-hexagon wrench in the sequence shown in the illustration.
Torque 29 Nm (300 kgf-cm, 22 ft-lbf)
Mark the front of the cylinder head bolt with paint.
Retighten the cylinder head bolts by 90° and then an additional 90° as shown in the illustration.
Check that the paint mark is now at a 180° angle from the front
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.
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