Fitting Piston
- Standard bore pistons and cylinders are stamped with same letter.
- Check piston clearance by inserting piston pull-scale with 0.0008" (.020 mm) or 0.0016" (.041 mm) feeler gauge (0.0020" or 0.051 mm on B 20 E & F engines) into cylinder at 90° to pin bore. Fit piston, crown first, into cylinder so that feeler gauge is held against cylinder wall by piston.
- Holding piston to prevent side thrust, withdraw gauge with a steady pull on scale. Clearance is correct when scale reads 2.2 lbs. (1 kg)
.NOTE: Procedure should be performed at several depths.
- When fitting piston, ensure slot on top of piston faces forward, as shown in illustration. Index number on connecting rod must face away from camshaft side.
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
| Engine | MAIN BEARINGS | CONNECTING ROD BEARINGS | ||||||
|---|---|---|---|---|---|---|---|---|
| Journal Diam. In. (mm) | Clearance In. (mm) | Thrust Bearing | Crankshaft End Play In. (mm) | Journal Diam. In. (mm) | Clearance In. (mm) | Side Play In. (mm) | ||
| 1963-68 | ||||||||
| B 18 B & D | 2.4977-2.4982 (63.44-63.45) | .0015-.0035 (.038-.089) | ..... | .0007-.0042 (.017-.108) | 2.1295-2.1300 (54.08-54.10) | .0015-.0032 (.038-.081) | ..... | |
| 1969 | ||||||||
| B20B | 2.4977-2.4982 (63.44-63.45) | .0010-.0030 (.025-.076) | ..... | .0007-.0042 (.017-.108) | 2.1295-2.1300 (54.08-54.10) | .0015-.0032 (.038-.081) | ..... | |
| 1970-72 | ||||||||
| B20B & B 20 E | 2.4981-2.4986 (63.45-63.46) | .0011-.0031 (.028-.079) | ..... | .0018-.0054 (.046-.137) | 2.1299-2.1304 (54.10-54.11) | .0012-.0028 (.030-.071) | ..... | |
| 1972-73 | ||||||||
| B 20 F | 2.4981-2.4986 (63.45-63.46) | .0011-.0033 (.028-.084) | ..... | .0018-.0054 (.046-.137) | 2.1299-2.1304 (54.10-54.11) | .0012-.0028 (.030-.071) | ..... | |