Valve Clearance Adjustment
Set No. 1 piston at TDC and adjust valves 1, 2, 3 & 5 (from front to rear). Set No. 4 piston (No. 3 on B 18 engines) at TDC and adjust remaining valves.
| Application | Clearance |
|---|---|
| B 18 B & B 20 B | .020-.022" (.51-.56 mm) |
| B 18 D (90 H.P.) | .016-.018" (.41-.46 mm) |
| B 18 D (95 H.P.) | .020-.022" (.51-.56 mm) |
| B 20 E & B 20 F | .016-.018" (.41-.46 mm) |