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 Lexus SC 430FACTORY OEM SERVICE PROCEDURE
Torque Specification
TORQUE SPECIFICATION
| Part tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Throttle position sensor x Throttle body | 2.0 | 20 | 18 in. lbf |
| Throttle body x Intake manifold | 18 | 185 | 13 |
| Intake air connector pipe x Intake manifold: for hose clamp for bolt |
4.0 | 40 | 35 in. lbf |
| 5.0 | 50 | 44 in. lbf | |
| V-Bank cover x V-Bank cover bracket | 5.0 | 50 | 44 in. lbf |
| RH camshaft oil control valve x Cylinder head | 8.5 | 85 | 75 in. lbf |
| LH camshaft oil control valve x Cylinder head | 8.5 | 85 | 75 in. lbf |
| ECM x ECM box | 5.5 | 55 | 48 in. lbf |
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.
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