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 |
|---|---|---|---|
| Fuel inlet hose (Rear fuel pipe) x Fuel main tube: for use with SST | 32 | 330 | 24 |
| Fuel pressure pulsation damper x Delivery pipe: for use with SST | 33 39 |
340 400 |
24 29 |
| Pressure x gauge Delivery pipe | 39 | 400 | 29 |
| Delivery pipe x Lower intake manifold | 21 | 204 | 14 |
| Vacuum switching valve x Intake manifold | 7.5 | 80 | 66in.lbf |
| V-Bank cover fastener x Intake manifold | 7.5 | 80 | 66in.lbf |
| V-Bank cover bracket No. 3 x Intake manifold | 7.5 | 80 | 66in.lbf |
| V-Bank cover bracket No. 2 x Intake manifold | 7.5 | 80 | 66in.lbf |
| V-Bank cover bracket No. 1 x Intake manifold | 7.5 | 80 | 66in.lbf |
Intake air pipe connector x Intake manifold:
|
|
|
|
| V-Bank cover x V-Bank cover bracket | 5.0 | 50 | 44in.lbf |
| Fuel tank vent tube set plate x Fuel tank | 6.0 | 61 | 52in.lbf |
| Fuel sender gauge x Fuel tank | 1.5 | 15 | 13in.lbf |
| Fuel tank x Body | 39.2 | 400 | 29 |
| Floor heat insulator x Fuel tank | 5.4 | 55 | 47 |
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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