Nissan and Datsun Workshop Service and Repair Manuals

Valve Seat: Specifications

Cylinder Head Warpage Limit ......................................................................................................................................................................................  0.004
Cylinder Head Overall Thickness [02] ...............................................................................................................................................................  4.205-4.220
Valve Guides:

Standard Inside Diameter ......................................................................................................................................................................................  [01]
Stem to Guide Clearance:

Intake ..................................................................................................................................................................................................  .0008-.0021
Exhaust ...............................................................................................................................................................................................  .0016-.0029

Valve Seats:

Seat Width:

Intake .............................................................................................................................................................................................................  0.069
Exhaust ..........................................................................................................................................................................................................  0.067

[01] --

Intake, .2756-.2763 inch; Exhaust, .3150-.3154 inch.

[02] --

Minimum thickness is overall thickness, less warpage limit, combined with amount of grinding of cylinder block gasket surface.