Mazda Workshop Service and Repair Manuals

Valve: Specifications

SPECIFICATIONS

Valves

Margin Thickness

IN .............................................................................................................................................................................................  0.09 mm (0.0354 inch)
EX ..............................................................................................................................................................................................  1.0 mm (0.0394 inch)

Valve Length

IN:

Standard .............................................................................................................................................................................  94.16 mm (3.707 inch)
Minimum ...........................................................................................................................................................................  95.21 mm (3.748 inch)

EX:

Standard .............................................................................................................................................................................  94.16 mm (3.707 inch)
Minimum ...........................................................................................................................................................................  95.21 mm (3.748 inch)

Valve Stem Diameter

IN:

Standard ................................................................................................................................................  5.970 - 5.985 mm (0.2351 - 0.2356 inch)
Minimum .........................................................................................................................................................................  5.920 mm (0.2331 inch)

EX:

Standard ................................................................................................................................................  5.965 - 5.980 mm (0.2349 - 0.2354 inch)
Minimum .........................................................................................................................................................................  5.915 mm (0.2329 inch)

Valve Guide

Guide Inner Diameter

IN ....................................................................................................................................................................  6.01 - 6.03 mm (0.2367 - 0.2374 inch)
EX ...................................................................................................................................................................  6.01 - 6.03 mm (0.2367 - 0.2374 inch)

Valve Guide Protrusion Height

IN ........................................................................................................................................................................  14.7 - 15.3 mm (0.579 - 0.602 inch)
EX .......................................................................................................................................................................  12.2 - 12.8 mm (0.481 - 0.503 inch)

Valve Seat

Seat Contact Width

IN ............................................................................................................................................................................  0.8 - 1.4 mm (0.032 - 0.055 inch)
EX ..........................................................................................................................................................................  0.8 - 1.4 mm (0.032 - 0.055 inch) 

Seat Angle

IN ............................................................................................................................................................................................................................  45°
EX ...........................................................................................................................................................................................................................  45°

Seat Sinking (Valve Protrusion Height)

IN:

Standard ...............................................................................................................................................................................  41.5 mm (1.634 inch)
Maximum .............................................................................................................................................................................  43.1 mm (1.697 inch)

EX:

Standard ...............................................................................................................................................................................  41.5 mm (1.634 inch)
Maximum .............................................................................................................................................................................  43.1 mm (1.697 inch)

Valve Spring

Pressing Force At Valve Spring Height H

IN:

H:38.7 mm (1.524 inch) .....................................................................................................  177.1 - 200.3 mm (18.05 - 20.43, 29.71 - 44.94 inch)

EX:

H:38.7 mm (1.524 inch) .....................................................................................................  177.1 - 200.3 mm (18.05 - 20.43, 29.71 - 44.94 inch)

Out Of Square

IN ...............................................................................................................................................................................................  1.61 mm (0.063 inch)
EX ..............................................................................................................................................................................................  1.61 mm (0.063 inch)

 
Valve Clearance

Intake .....................................................................................................................................................................  0.245 - 0.315 mm (0.010 - 0.012 inch)
Exhaust ..................................................................................................................................................................  0.267 - 0.335 mm (0.011 - 0.013 inch)