Piston, Engine

DESIGN SPECIFICATIONS
Pistons
Piston Diameter @ 14.5 mm up 85.967-85.982 (3.3845-3.3851)
Piston-to-Bore Clearance 0.010-0.041 (0.0004-0.0016)
Piston Weight - (-)
Piston Height Max. -0.9 mm below deck
Piston Pin Bore I.D. 20.002-20.007 (0.7875-0.7877)
Ring Groove Width, Top 1.23 1.25 (-)
Ring Groove Width, Second 1.52-1.54 (-)
Ring Groove Width, Oil Control 2.52-2.54 (-)
Piston Ring Thickness, Top 1.170-1.190 (0.0461-0.0469)
Piston Ring Thickness, Second 1.471-1.490 (0.0579-0.0587)
Piston Ring Thickness, Oil Control Rail 0.43 max (-)
Piston Ring Thickness, Oil Control Spacer 1.574-1.651 (-)
Ring-to-Groove Clearance, Top 0.04-0.08 (-)
Ring-to-Groove Clearance, Second 0.030-0.069 (0.0012-0.0027)
Ring-to-Groove Clearance, Oil Control 0090-0.106 (-)
Ring Gap, Top 0.20-0.40 (0.008-0.016)
Ring Gap, Second 0.35-0.55 (0.014-0.022)
Ring Gap, Oil Rails 0.25-0.76 (0.010-0.030)
Piston Pin O.D. 19.995-20.000 (0.7872-0.7874)
Piston-to-Pin Clearance 0.002-0.012 (0.0001-0.0005)
Pin-to-Rod Clearance 0.007-0.026 (-)
Piston Pin Endplay 0.19-1.16 (0.007-5-0.0461)