Nissan and Datsun Workshop Service and Repair Manuals

Valve Guide: Specifications

DIMENSIONS 

Outer Diameter

Standard

Intake  ................................................................................................................................................  11.023 - 11.034 mm (0.4340 - 0.4344 inch)
Exhaust  .............................................................................................................................................  12.023 - 12.034 mm (0.4733 - 0.4738 inch)

Service

Intake  ................................................................................................................................................  11.223 - 11.234 mm (0.4418 - 0.4423 inch)
Exhaust  .............................................................................................................................................  12.223 - 12.234 mm (0.4812 - 0.4817 inch)

Inner Diameter (Finished Size)

Standard

Intake .....................................................................................................................................................  7.000 - 7.018 mm (0.2756 - 0.2763 inch)
Exhaust  .................................................................................................................................................  8.000 - 8.011 mm (0.3150 - 0.3154 inch)

Service

Intake .....................................................................................................................................................  7.000 - 7.018 mm (0.2756 - 0.2763 inch)
Exhaust .................................................................................................................................................   8.000 - 8.011 mm (0.3150 - 0.3154 inch)

Cylinder Head Guide Hole Diameter

Standard

Intake  ................................................................................................................................................  10.975 - 10.996 mm (0.4321 - 0.4329 inch)
Exhaust  .............................................................................................................................................  11.975 - 11.996 mm (0.4715 - 0.4723 inch)

Service

Intake  ................................................................................................................................................  11.175 - 11.196 mm (0.4400 - 0.4408 inch)
Exhaust  .............................................................................................................................................  12.175 - 12.196 mm (0.4793 - 0.4802 inch)

Interference Fit Of Valve Guide 

Standard

Intake  ....................................................................................................................................................  0.027 - 0.059 mm (0.0011 - 0.0023 inch)
Exhaust  .................................................................................................................................................  0.027 - 0.059 mm (0.0011 - 0.0023 inch)

Service

Intake  ...................................................................................................................................................  0.027 - 0.059 mm (0.0011 - 0.0023 inch) 
Exhaust  ................................................................................................................................................  0.027 - 0.059 mm (0.0011 - 0.0023 inch) 

Stem To Guide Clearance

Standard

Intake  ....................................................................................................................................................  0.020 - 0.053 mm (0.0008 - 0.0021 inch)
Exhaust  .................................................................................................................................................  0.040 - 0.049 mm (0.0016 - 0.0019 inch)

Valve Deflection Limit

Standard  ....................................................................................................................................................................................................................  --
Service  .................................................................................................................................................................................  0.020 mm (0.0079 inch)