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.
1993 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| ES300 | ||
| Air Intake Chamber Bolt/Nut | 32 (43) | |
| Air Intake Chamber Stay (Brace) Bolt | 29 (39) | |
| Cold Start Injector Pipe Union Bolt | 11 (15) | |
| EGR Pipe Bolt | 13 (18) | |
| EGR Pipe Union Nut | 58 (78) | |
| Engine Hanger Bolt | 29 (39) | |
| GS300 & SC300 | ||
| Air Intake Connector Bolt/Nut | 15 (20) | |
| Camshaft Bearing Cap Bolt | 14 (19) | |
| EGR Pipe Bolt | 15 (20) | |
| EGR Pipe Union Nut | 15 (20) | |
| Throttle Body Bracket | 47 (64) | |
| LS400 & SC400 | ||
| Throttle Body Bolt/Nut | 13 (18) | |
| INCH Lbs. (N.m) | ||
| Cylinder Head Cover Bolt/Nut | ||
| ES300, LS400 & SC400 | 52 (5.9) | |
| GS300 | 74 (8.3) | |
| SC300 | 48 (5.4) | |
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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