Mazda MX-5 Miata Sport 2007 Manual page 27

2007 Mazda MX-5 Miata Sport
2006-08 ENGINE Mechanical - Overhaul - 2.0L (LF) & 2.3L (L3) - Mazda6 & MX-5 Miata
Fig. 27: Calculating Valve Stem To Guide Clearance
Courtesy of MAZDA MOTORS CORP.
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.
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Valve guide protrusion height (standard) 12.2-12.8 mm {0.481-0.503 in}