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.
1992 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 | |||
| Except SC300 | 27 (37) | ||
| SC300 | 13 (18) | ||
| Cold Start Injector Tube | |||
| ES300 | 11 (15) | ||
| LS400 | 14 (19) | ||
| Distributor Hold-Down Bolts | 13 (18) | ||
| Engine Hanger Bolts | 27 (37) | ||
| Fuel Pipe Banjo Bolts | |||
| Except SC300 | 24 (33) | ||
| SC300 | |||
| No. 1 Fuel Line | 20 (27) | ||
| No. 2 Fuel Line | 30 (42) | ||
| Fuel Pressure Regulator Lock Nut | 24 (33) | ||
| Fuel Rail Mounting Bolts | |||
| Except SC300 | 9 (12) | ||
| SC300 | 15 (21) | ||
| Fuel Rail Nuts | 13 (18) | ||
| Oxygen Sensor | 33 (45) | ||
| Pulsation Damper | 22 (30) | ||
| Right Engine Mount Stay | 38 (51) | ||
| Vacuum Switching Valve (VSV) | 13 (18) | ||
| INCH Lbs. (N.m) | |||
| Accelerator Cable Bracket | 69 (7.8) | ||
| Air Pipe Bolts | 69 (7.8) | ||
| Cold Start Injector Bolts | |||
| ES300 | 74 (8.3) | ||
| LS400 & SC400 | 43 (4.9) | ||
| Control Valve Actuator Bolts (SC300) | 61 (6.8) | ||
| Fuel Pump-To-Tank Bolts | 30 (3.4) | ||
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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