Valve Clearance Inspection

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Measure the valve clearance as follows:
1. Turn the crankshaft clockwise so that the No.1 piston is at TDC of the compression stroke.
2. Measure the valve clearance at A in the figure.
  - If the valve clearance exceeds the standard, replace the tappet. (See VALVE CLEARANCE ADJUSTMENT .)
Fig 1: Identifying Valves A & B
Courtesy of MAZDA MOTORS CORP.

Standard [Engine Cold]
1. IN: 0.22-0.28 mm {0.0087-0.0110 in}
2. EX: 0.27-0.33 mm {0.0106-0.0130 in}
Turn the crankshaft 360° clockwise so that the No.4 piston is at TDC of the compression stroke.

NOTE:

Make sure to note the measured values for choosing the suitable replacement tappets.

Measure the valve clearance at B in the figure.
- If the valve clearance exceeds the standard, replace the tappet. (See VALVE CLEARANCE ADJUSTMENT .)
Standard [Engine Cold]
1. IN: 0.22-0.28 mm {0.0087-0.0110 in}
2. EX: 0.27-0.33 mm {0.0106-0.0130 in}