Valve Guide Replacement; Valve Guide Removal; Valve Guide Installation - Mazda 2006-2008 RX7 Engine Workshop Manual

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5. Calculate the valve stem to guide clearance by

subtracting the outer diameter of the valve stem

from the inner diameter of the corresponding

valve guide.

• If it exceeds the specification, replace the

valve and/or the valve guide.

Valve stem to guide clearance (Standard)

IN: 0.024—0.069 mm {0.0009—0.0027 in}

EX: 0.029—0.074 mm {0.0012—0.0029 in}

Valve stem to guide clearance (Maximum)

0.10 mm {0.004 in}

6. Measure the protrusion height (dimension A) of

each valve guide without lower valve spring seat.

• If not within the specified, replace the valve

guide.

Valve guide protrusion height (standard)

12.2—12.8 mm {0.481—0.503 in}

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