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
WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
1GF-FE:
TORQUE SPECIFICATION - 1GF-FE
| Part Tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Cylinder block water drain cock plug x Cylinder block water drain cock | 13 | 130 | 9 |
| Water pump assy x Timing chain or belt cover sub-assy 10 mm (0.39 in.) head | 9.0 | 92 | 80 in.lbf |
| Water pump assy x Timing chain or belt cover sub-assy 12 mm (0.47 in.) head | 23 | 235 | 17 |
| Idler pulley sub-assy No. 2 x Timing chain or belt cover sub-assy | 39 | 398 | 29 |
| Water inlet x Timing chain or belt cover sub-assy | 9.0 | 92 | 80 in.lbf |
| Fan shroud x Radiator | 5.0 | 51 | 44 in.lbf |
| Fan w/fluid coupling x Water pump | 21 | 214 | 15 |
| V-bank covei x Intake air surge tank | 7.5 | 76 | 66 in.lbf |
| Engine under cover sub-assy No. 1 x Frame assy | 29 | 296 | 21 |
| Water inlet w/thermostat x Water inlet | 9.0 | 92 | 80 in.lbf |
| Radiator x Radiator support | 18 | 184 | 13 |
2UZ-FE:
TORQUE SPECIFICATION - 2UZ-FE
| Part Tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Drain plug x Union on cylinder block | 13 | 130 | 9 |
| Fan x Fluid coupling | 5.5 | 55 | 47 in.lbf |
| Water pump x Cylinder block Bolt | 21 | 215 | 16 |
| Water pump x Cylinder block Stud bolt and nut | 18 | 185 | 13 |
| Water inlet housing x Water pump | 18 | 185 | 13 |
| Water inlet x Water inlet housing | 19 | 195 | 14 |
| Radiator x Radiator support | 18 | 184 | 13 |
| Fan shroud x Radiator | 5.0 | 51 | 44 in.lbf |
| Radiator reserve tank x Fan shroud | 5.0 | 51 | 44 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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