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 LS 430FACTORY OEM SERVICE PROCEDURE
Torque Specification
TIGHTENING TORQUE SPECIFICATION
| Part tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Fuel inlet hose (Rear fuel pipe) x Fuel main tube : for use with SST | 32 | 330 | 24 |
| Fuel tank vent tube set plate x Fuel tank | 3.5 | 36 | 31 in.lbf |
| Delivery pipe x Lower intake manifold | 18 | 185 | 13 |
| Fuel pressure pulsation damper x Delivery pipe : for use with SST | 33 39 |
340 400 |
24 29 |
| Fuel sender gauge x Fuel tank | 1.5 | 15 | 13 in.lbf |
| Fuel tank x Body | 39 | 400 | 29 |
| Water bypass pipe x Throttle body | 5.4 | 55 | 48 in.lbf |
| Throttle body x Upper intake manifold, Lower intake manifold | 18 | 185 | 13 |
| Camshaft oil control valve x Camshaft bearing cap | 7.5 | 80 | 66 in.lbf |
| Intake air control valve x Upper intake manifold | 8.5 | 85 | 75 in.lbf |
| Intake air control valve actuator x Upper intake manifold | 8.5 | 85 | 75 in.lbf |
| Vacuum tank for ACIS x Lower intake manifold | 18 | 185 | 13 |
| Water temperature sensor x Front water bypass joint | 19.6 | 200 | 14 |
| Knock sensor x Cylinder block | 45 | 450 | 33 |
| Heated oxygen sensor x Exhaust manifold, Front exhaust pipe | 44 | 450 | 32 |
| VVT sensor x Cylinder head | 6.5 | 65 | 58 in.lbf |
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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