Toyota Workshop Service and Repair Manuals

Valve: Specifications

Valve Stem Diameter:

Intake .................................................................................................................................................................  5.970 - 5.985 mm (0.2350 - 0.2356 inch)
Exhaust .....................................................................................................................................................................  5.965 - 5.980 (0.2348 - 0.2354 inch)

Oil Clearance (Between Valve Stem and Bushing):

Standard:

Intake .........................................................................................................................................................................  0.025 - 0.060 mm (0.0031 inch)
Exhaust ........................................................................................................................................................  0.030 - 0.065 mm (0.0012 - 0.0026 inch)

Maximum:

Intake .......................................................................................................................................................................................  0.08 mm (0.0031 inch)
Exhaust ....................................................................................................................................................................................  0.10 mm (0.0039 inch)

Valve Face Angle ..........................................................................................................................................................................................................  44.5°

Valve Head Margin Thickness:

Standard ........................................................................................................................................................................  0.8 - 1.2 mm (0.031 - 0.047 inch)
Minimum ...........................................................................................................................................................................................  0.5 mm (0.020 inch)

Valve Overall Length:

Standard:

Intake ...........................................................................................................................................................  97.40 - 97.80 mm (3.8346 - 3.8504 inch)
Exhaust ........................................................................................................................................................  98.25 - 98.65 mm (3.8681 - 3.8839 inch)

Minimum:

Intake .........................................................................................................................................................................................  97.1 mm (3.823 inch)
Exhaust ......................................................................................................................................................................................  98.0 mm (3.858 inch)

Valve Face Width (Seat Contact):

Prussian Blue* ...............................................................................................................................................................  1.0 - 1.4 mm (0.039 - 0.055 inch)

*Apply a light coat of prussian blue (or white lead) to the valve face. Lightly press the valve against the seat. Do not rotate valve. Ensure Seat Contact is
in the middle of the valve face.