1990-2000 Lexus LS 400 Valve Seals Torque Specs

4.0L V8

Applies to 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, and 2000 Lexus LS 400

Labor Time:8 hours

Torque Values (10 specifications)

Component	Nm	lb-ft	Notes
⚠️ Camshaft Cap Bolts	14	10	Tighten in sequence from center outward, multiple passes
Cover Bolts	19	14	—
⚠️ Gasket Bolts	23	17	—
Mounting Bolts	31	23	—
⚠️ Mounting Bolts	55	40	—
⚠️ Rocker Arm Bolts	30	22	Tighten with cam lobe pointing away
⚠️ Rocker Arm Shaft Bolts	25	18	Tighten evenly in sequence
Sensor Bolts	12	9	—
⚠️ Spark Plugs - Aluminum Head	20	15	Apply anti-seize to threads
Valve Cover Bolts	10	7	Tighten in sequence

Other Jobs with Torque Specs

Common Questions

What is the torque spec for valve seals on a 1990-2000 Lexus LS 400?

The primary torque specification for valve seals on a 1990-2000 Lexus LS 400 is 14 Nm (10 lb-ft). Note: Tighten in sequence from center outward, multiple passes

How many torque specs are there for Lexus LS 400 valve seals?

There are 10 torque specifications for valve seals on the 1990-2000 Lexus LS 400 4.0L V8, covering all related fasteners and components.