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
Spark plug x Cylinder head	18	180	13
Ignition coil x Cylinder head cover	7.5	80	66 in.lbf
Camshaft position sensor x LH cylinder head	7.5	80	66 in.lbf
Crankshaft position sensor x Oil pump	6.5	65	58 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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