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 LS 400FACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Air Intake Chamber Bolts | 32 (43) | |
| Air Intake Chamber Stay Bolts | ||
| ES300 | 29 (39) | |
| SC300 & GS300 | 13 (18) | |
| Cold Start Injector Tube | ||
| ES300 | 11 (15) | |
| Distributor Hold-Down Bolts | ||
| ES300 & LS400 | 13 (18) | |
| SC300 | 10 (14) | |
| GS300 | 14 (19) | |
| Engine Hanger Bolts | ||
| ES300 | 29 (39) | |
| Fuel Pipe Banjo Bolts | 25 (34) | |
| Fuel Rail Mounting Bolts | ||
| LS400 | 13 (18) | |
| SC300 & GS300 | 15 (21) | |
| Oxygen Sensor | 33 (45) | |
| Throttle Body Nuts | ||
| SC300 & GS300 | 15 (21) | |
| LS400 & SC400 | 13 (18) | |
| INCH Lbs. (N.m) | ||
| Air Pipe Bolts | 65 (7.3) | |
| Cold Start Injector Bolts | ||
| ES300 | 73 (8.3) | |
| SC400 | 69 (7.8) | |
| Crankshaft Position Sensor Bolt | ||
| LS400 | 57 (6.4) | |
| Fuel Pump-To-Tank Bolts | 35 (3.9) | |
| Fuel Rail Mounting Bolts | ||
| ES300 | 115 (13) | |
| Throttle Body Nuts | ||
| ES300 | 115 (13) | |
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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