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.
2003 Kia Optima L4-2.4LFACTORY OEM SERVICE PROCEDURE
Intake Manifold
| Throttle body stay | 15 - 22 Nm |
| Accelator cable bolts to intake manifold | 4 - 6 Nm |
| Throttle body to intake manifold | 15 - 22 Nm |
| Intake manifold stay bolts | 18 - 22 Nm |
| Intake manifold mounting bolt (M8) | 15 - 20 Nm |
| Intake manifold mounting bolt (M10) | 18 - 25 Nm |
| Intake manifold mounting nut | 30 - 42 Nm |
Factory Service Tools
Use the Manual With the Right Hardware
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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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