mazda Workshop Repair Guides

Mazda Workshop Service and Repair Manuals

Valve, Intake/Exhaust|Specifications|Page 821 > < Valve Spring|Specifications|Page 817
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Valve: Specifications

MARGIN THICKNESS 

IN .................................................................................................................................................................................  0.8 - 1.2 mm {0.032 - 0.047 inch}
EX ...............................................................................................................................................................................  1.2 - 1.8 mm {0.048 - 0.070 inch} 

NOTE: Check the valve head margin thickness. Replace the valve if necessary.

VALVE LENGTH

Standard:

IN .......................................................................................................................................................................................  121.31 mm {4.7760 inch}
EX ......................................................................................................................................................................................  122.63 mm {4.8279 inch}

Minimum:

IN .......................................................................................................................................................................................  120.91 mm {4.7602 inch}
EX .....................................................................................................................................................................................  122.23 mm {4.8122 inch} 

NOTE: Measure the valve length. Replace the valve if necessary.

VALVE STEM DIAMETER

IN .....................................................................................................................................................................  6.970 - 6.985 mm {0.2745 - 0.2750 inch}
EX ...................................................................................................................................................................  8.025 - 8.040 mm {0.3160 - 0.3165 inch} 

NOTE: Measure the valve stem diameter in X and Y directions at three points (A, B and C) as shown. Replace the valve if necessary.

SEAT CONTACT WIDTH

Width............................................................................................................................................................................ 1.2 - 1.6 mm {0.048 - 0.062 inch} 

NOTES:
-

If the valve seating position on the valve face is too high, correct the valve seat with a 65° cutter. 

Valve, Intake/Exhaust|Specifications|Page 821 > < Valve Spring|Specifications|Page 817