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1.14
Section 1
Safety and General Information
Piston, Piston Rings, and Piston Pin cont.
Top and Middle Compression Ring End Gap
New Bore - CV17
Top Ring ............................................................................................... 0.180/0.380 mm (0.0071/0.0150 in.)
Middle Ring .........................................................................................0.180/0.440 mm (0.0071/0.0173 in.)
New Bore - CV18,CV20,CV22 (624 cc) .................................................0.25/0.45 mm (0.0098/0.0177 in.)
New Bore - CV22 (674 cc) .......................................................................0.18/0.46 mm (0.0071/0.0181 in.)
New Bore - CV25,CV26,CV730-750 .....................................................0.25/0.56 mm (0.0100/0.0224 in.)
Used Bore (Max.) - CV17
Top Ring ...............................................................................................0.70 mm (0.028 in.)
Middle Ring .........................................................................................0.90 mm (0.035 in.)
Used Bore (Max.) - CV18,CV20,CV22 (624 cc) .....................................0.77 mm (0.030 in.)
Used Bore (Max.) - CV22/23 (674 cc) .....................................................0.80 mm (0.0315 in.)
Used Bore (Max.) - CV25,CV26,CV730-750 ......................................... 0.94 mm (0.037 in.)
Piston Thrust Face O.D.²
New - CV17 .............................................................................................. 72.966/72.984 mm (2.8727/2.8734 in.)
New - CV18,CV20,CV22 (624 cc) ..........................................................76.967/76.985 mm (3.0302/3.0309 in.)
New - CV22/23 (674 cc) ..........................................................................79.963/79.979 mm (3.1481/3.1488 in.)
New - CV25,CV26,CV730-750 ..............................................................82.986 mm (3.2671 in.)
Max. Wear Limit - CV17.........................................................................72.839 mm (2.8677 in.)
Max. Wear Limit - CV18,CV20,CV22 (624 cc) .....................................76.840 mm (3.0252 in.)
Max. Wear Limit - CV22 (674 cc)...........................................................79.831 mm (3.1430 in.)
Max. Wear Limit - CV25,CV26,CV730-750 .........................................82.841 mm (3.2614 in.)
Piston Thrust Face-to-Cylinder Bore² Running Clearance
New - CV17 .............................................................................................. 0.022/0.065 mm (0.0009/0.0026 in.)
New - CV18,CV20,CV22 (624 cc) ..........................................................0.014/0.057 mm (0.0005/0.0022 in.)
New - CV22/23 (674 cc) ..........................................................................0.021/0.062 mm (0.0008/0.0024 in.)
New - CV25,CV26,CV730-750 ..............................................................0.001/0.045 mm (0.039/0.0018 in.)
Speed Control Bracket
Fastener Torque...............................................................................................10.7 N·m (95 in. lb.) into new holes
7.3 N·m (65 in. lb.) into used holes
Starter Assembly
Thru Bolt Torque
UTE/Johnson Electric, Eaton (Inertia Drive)......................................... 4.5-5.7 N·m (40-50 in. lb.)
Nippondenso (Solenoid Shift)................................................................ 4.5-7.5 N·m (40-84 in. lb.)
Delco-Remy (Solenoid Shift) ..................................................................5.6-9.0 N·m (49-79 in. lb.)
Mounting Screw Torque (All) ....................................................................... 15.3 N·m (135 in. lb.)
Brush Holder Mounting Screw Torque
Delco-Remy Starter ................................................................................. 2.5-3.3 N·m (22-29 in. lb.)
Solenoid (Starter)
Mounting Hardware Torque
Nippondenso Starter .............................................................................. 6.0-9.0 N·m (53-79 in. lb.)
Delco-Remy Starter ................................................................................. 4.0-6.0 N·m (35-53 in. lb.)
Nut, Positive (+) Brush Lead Torque
Nippondenso Starter .............................................................................. 8.0-12.0 N·m (71-106 in. lb.)
Delco-Remy Starter ................................................................................. 8.0-11.0 N·m (71-97 in. lb.)
²Measure 6 mm (0.236 in.) above the bottom of the piston skirt at right angles to the piston pin.