2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Torque Specifications

WARNING: This page is about a different car, the 2004 Toyota 4Runner and 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
TORQUE SPECIFICATIONS

Application Ft. Lbs. (N.m)
Engine Under Cover Bolts 21 (29)
Intake Manifold Assembly
Bolts 13 (18)
Nuts 13 (18)
Manifold Stay Bolts 30 (40)
Starter Mounting Bolts
V6 27 (37)
V8 29(39)
Water Bypass
Joint Nuts 13 (18)
Pipe Bolt 13 (18)
Yoke Bolts 27 (36)
INCH Lbs. (N.m)Β 
End Cover Bolts
1.4 Kw 13 (1.5)
1.6 Kw 53 (6)
2.0 Kw 34 (3.8)
Starter Through Bolts
1.4 Kw 52 (5.9)
1.6 Kw 53 (6)
2 Kw 82 (9.3)
Magnetic Switch
Terminal No. 30 Nut 87 (9.8)
Terminal "C" Nut
1.4 Kw 52 (5.9)
1.6 Kw 88 (10)
2 Kw 52 (5.9)
Screws
1.4 Kw 52 (5.9)
1.6 Kw 66 (7.5)
2 Kw 82 (9.3)
Wire Harness Nut 115 (13)
(1) Unlisted Torque Specifications: manufacturer does not provide a torque specification for all bolts and nuts in each procedure. To determine proper torque specification, use the graphic charts. To determine class of bolt, see Fig 1. To determine torque specification for class of bolt by size, see Fig 2. To determine class of nut, see Fig 3.
Fig 1: Bolt Class Determination Chart
G00297770Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.