Mazda MX-5 Miata Sport 2007 Manual page 40

2006-08 ENGINE Mechanical - Overhaul - 2.0L (LF) & 2.3L (L3) - Mazda6 & MX-5 Miata
Fig. 40: Measuring Journal Diameters In X And Y Directions At Two Points (A And B)
Courtesy of MAZDA MOTORS CORP.
5. Remove the tappet.
6. Position a plastigage atop the journals in the axial direction.
7. Install the camshaft cap. (See CAMSHAFT ASSEMBLY NOTE).
8. Remove the camshaft cap. (See CAMSHAFT CAP DISASSEMBLY NOTE).
9. Measure the oil clearance.
If it exceeds the specification, replace the cylinder head.

Camshaft journal oil clearance (Standard)
0.035-0.080 mm {0.0014-0.0031 in}
Camshaft journal oil clearance (Maximum)
0.09 mm {0.0035 in}
2007 Mazda MX-5 Miata Sport