LS 400 V8-4.0L (1UZ-FE) (1990)
- Disconnect idle speed control air hose.
- Disconnect power steering idle-up air hose.
- Remove air intake hose.
Ignition Wire Upper Cover
- Remove upper ignition wire cover.
Right Side Ignition Wire Cover
- Remove right side wire cover.
N0. 3 Timing Belt Cover
- Remove No. 3 timing belt cover.
- Disconnect ignition wires from spark plugs.
- Remove spark plugs.
Installation
- Gap new spark plugs to 0.043 in. (1.1 mm).
- Install spark plugs.
Torque value - 13 ft.lb (18 Nm)
- Reattach ignition wires.
- Reinstall covers.