Mazda MX-5 Miata Sport 2007 Manual page 25

2007 Mazda MX-5 Miata Sport
2006-08 ENGINE Mechanical - Overhaul - 2.0L (LF) & 2.3L (L3) - Mazda6 & MX-5 Miata
Valve stem diameter (Standard)
IN: 5.470-5.485 mm {0.2154-0.2159 in}
EX: 5.465-5.480 mm {0.2152-0.2157 in}
Valve stem diameter (Minimum)
IN: 5.440 mm {0.2142 in}
EX: 5.435 mm {0.2140 in}
Fig. 25: Measuring Stem Diameter
Courtesy of MAZDA MOTORS CORP.
4. Measure the inner diameter of each valve guide in X and Y directions at the three points (A, B, and C) as
indicated in the figure.
If not as specified, replace the valve guide.

Valve guide inner diameter (Standard)
5.509-5.539 mm {0.2169-0.2180 in}