Mazda MX-5 Miata Sport 2007 Manual page 53

2006-08 ENGINE Mechanical - Overhaul - 2.0L (LF) & 2.3L (L3) - Mazda6 & MX-5 Miata
Crank pin out of round (Maximum)
0.05 mm {0.0019 in}
Fig. 53: Measuring Journal Diameter In X And Y Directions At Two Points (A And B)
Courtesy of MAZDA MOTORS CORP.
6. Install the main bearing caps and crankshaft.
7. Position a plastigage atop the journals in the axial direction.
8. Install the main bearing caps and cylinder block. (See MAIN BEARING CAP ASSEMBLY NOTE).
9. Remove the main bearing caps. (See MAIN BEARING CAP DISASSEMBLY NOTE).
10. Measure the main journal oil clearance.
If it exceeds the specification, replace the main bearing using the main bearing selection table or

grind the main journal and install the oversize bearings so that the specified oil clearance is
obtained.
Main journal oil clearance (Standard)
0.019-0.035 mm {0.0007-0.0013 in}
Main journal oil clearance (Maximum)
2007 Mazda MX-5 Miata Sport