toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Valve, Intake/Exhaust|Inspection|Page 1380 > < Valve, Intake/Exhaust|Specifications
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Valve: Testing and Inspection
Inspection

1. Inspect and grind valves.

(a)

Grind the valve enough to remove pits and carbon.

(b) Check that the valve is ground to the correct valve face angle. 

Valve face angle: 44.5° 

(c)

Check the valve head margin thickness. 
Standard margin thickness: 1.0 mm (0.039 inch) 
Minimum margin thickness: 0.5 mm (0.020 inch) 
If the margin thickness is less than the minimum, replace the valve.

(d) Check the valve overall length.

Standard overall length:

Intake: 95.15 mm (3.7461 inch) 
Exhaust: 94.90 mm (3.7362 inch) 

Minimum overall length: 

Intake: 94.60 mm (3.7244 inch) 
Exhaust: 94.40 mm (3.7165 inch) 

If the overall length is less than the minimum, replace the valve.

Valve, Intake/Exhaust|Inspection|Page 1380 > < Valve, Intake/Exhaust|Specifications