3304 VEHICULAR ENGINESSPECIFICATIONSTM 5-3805-263-14&P-2PISTONS AND RINGSPISTONS AND PISTON RINGS(1) TOP RING(2) INTERMEDIATE RING(3) OIL CONTROL RINGPart No*9L6932*9L6933**9L6934Width of groove in piston for piston ring* * ** * *3.188 ± 0.013 mm(new)--(.1255 ± .0005 in.)* * ** * *3.137 ± 0.013 mmThickness of piston ring (new)--(.1235 ± .0005 in.)Clearance between groove and piston* * ** * *0.051 ± 0.025 mmring (new)--(.0020 ± .0010 in.)--Maximum permissible clearance* * ** * *0.15 mm(worn)--(.006 tn.)Clearance between ends of piston ring0.572 ± 0.191 mmwhen Installed in a cylinder liner with a0.622 ± 0.191 mm0.622 ± 0.191 mmbore size of 120.650 mm (4.7500 in.)(.0245 ± .0075 in )(.0245 ± .0075 in)( 0 2 2 5 ±.0075 in.)Increase in clearance between ends ofpiston ring for each 0.03 mm (.001 in.)0.08 mmIncrease in cylinder liner bore size(.003 in.)*Install piston ring with “UP” side toward top of pistonNOTE: 9L6932 Top Ring (1) has the mark “UP-1”.9L6933 Intermediate Ring (2) has the mark “UP-2”.**Install 9L6934 Oil Control Ring (3) with the gap in the spring 180° away from the gap in the ring.***Keystone” style piston rings and grooves in pistons.The KEYSTONE PISTON RING GROOVE GAUGE is necessary formeasuring these grooves, Put the pin end (A) of gauge “2” in the groove at four places around the circumference. Do this to both grooves.The flat edge (B) of the gauge must be between grooves (1) and (2). If there is clearance between the flat edge (B) of the gauge and thepiston at all test locations, for both grooves, the piston is reusable. If the flat edge (B) is in contact with the piston, at any of the testlocations, the piston is not reusable. Install a new piston.(4) Bore in piston forpin . . . . . . . . . . . .43.195 ± 0.008 mm (1.7006 ± .0003 in.)Clearance between pin and borein piston . . . . . . . . . . . . . . . . . .0.008 to 0.033 mm (.0003 to .0013 in.)Maximum permissible clearance(worn) .....................................................0.05 mm (.002 in.)Pindiameter . . . . . . . . . . 43.175 ± 0.005 mm (1.6998 ± .0002 in.)NOTE: When installed in the engine, the “V” mark on top of the pistonmust be in alignment with the ”V” mark on the cylinder block.1-241
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