5 - 69ENGCONNECTING RODS AND PISTONSCHECKING THE PISTON PINSThe following procedure applies to all of thepiston pins.1. Check:• piston pinBlue discoloration/grooves → Replace thepiston pin and then check the lubricationsystem.2. Measure:• piston pin outside diameter aOut of specification → Replace the pistonpin.Piston pin outside diameter16.991 ~ 17.000 mm(0.6689 ~ 0.6693 in)3. Measure:• piston pin bore inside diameter bOut of specification → Replace the piston.4. Calculate:• piston-pin-to-piston clearanceOut of specification → Replace the pistonpin and piston as a set.CHECKING THE BIG END BEARINGS1. Measure:• crankshaft-pin-to-big-end-bearing clearanceOut of specification → Replace the big endbearings.Piston pin bore inside diameter17.002 ~ 17.013 mm(0.6694 ~ 0.6698 in)Piston-pin-to-piston clearance =Piston pin bore size –Piston pin outside diameterPiston-pin-to-piston clearance0.002 ~ 0.022 mm(0.00008 ~ 0.00087 in)Crankshaft-pin-to-big-end-bear-ing clearance0.031 ~ 0.055 mm(0.0012 ~ 0.0022 in)
