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Piston Specifications

WARNING: This page is about a different car, the 2007 Mazda B3000, 2006 Mazda B3000, 2005 Mazda B3000, 2004 Mazda B3000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
PISTON SPECIFICATIONS

Item Specification
Diameter 
Coded Red 88.962-88.978 mm (3.5024-3.5031 In.)
Coded Blue 88.988-89.004 mm (3.5035-3.5041 In.)
Coded Yellow 89.014-89.030 mm (3.5045-3.5051 In.)
Piston-To-Bore Clearance 0.030-0.056 mm (0.0012-0.0022 In.)
Service Limit 0.081 mm Max.
Service Piston Selection ( (1) ) 
Piston Bore Diameter Service Piston Grade Required
89.009-89.035 mm (3.5043-3.05053 In.) RED
89.035-89.060 mm (3.5053-3.5063 In.) BLUE
89.060-89.086 mm (3.5063-3.5073 In.) YELLOW
Ring Groove Width
Compression (Top) 1.530-1.555 mm (0.0602-0.0612 In.)
Compression (Bottom) 4.030-4.055 mm (0.1587-0.1596 In.)
Piston Pin 
Length 76.5-77.2 mm (3.012-3.039 In.)
Diameter 23.162-23.175 mm (0.9119-0.9124 In.)
Pin to Piston Clearance 0.005-0.012 mm (0.002-0.0005 In.)
Pin to Rod Clearance Press Kit 4 KiloNewtons (900 Lbs.)
Piston Pins 
Ring Width
Compression (Top) 1.460-1.490 mm (0.0575-0.0587 In.)
Compression (Bottom) 1.460-1.490 mm (0.0575-0.0587 In.)
Oil Ring Side Seal - Snug Fit
Service Limit Side Clearance 0.15 mm Max. (0.0006 In. Max.)
Ring Gap
Compression (Top) (In Gauge) 0.25-0.50 mm (0.01-0.02 In.)
Compression (Bottom) (In Gauge) 0.25-0.50 mm (0.01-0.02 In.)
Oil Ring (Steel Rail) (In Gauge) 0.25-1.25 mm (0.010-0.049 In.)
Side Clearance
1st Ring 0.040-0.095 mm (0.0016-0.0037 In.)
2nd Ring 0.040-0.095 mm (0.0016-0.0037 In.)
(1) When replacing pistons, measure the cylinder bore as described, and install the indicated service piston.