Valve Clearance Adjustment
Remove valve cover and rotate engine until piston of valves being adjusted is at TDC of compression stroke. Loosen nut on rocker arm and rotate adjustment cam until correct clearance is obtained.
VALVE CLEARANCE ADJUSTMENT
| Valve |
Clearance |
| All |
| |
(Hot) |
.012-.014" (.30-.35 mm) |
| |
(Cold) |
.010-.012" (.25-.30 mm) |
Courtesy of BMW OF NORTH AMERICA, INC. PISTONS, PINS, RINGS
| Engine |
PISTONS Clearance In. (mm) |
PINS |
RINGS |
| Piston Fit In. (mm) |
Rod Fit In. (mm) |
Rings |
End Gap In. (mm) |
Side Clearance In. (mm) |
| 1969-73 |
.0016 (.04) |
.00004-.0002 (.001-.005) |
.0002-.0005 (.005-.013) |
No. 1 |
.0118-.0177 (.30-.45) |
.0006-.0011 (.015-.029) |
| .0003-.0006 (.008-.016) |
No. 2 |
.0118-.0177 (.30-.45) |
.0005-.0009 (.012-.022) |
| Oil |
.0098-.0157 (.25-.40) |
.0004-.0010 (.011-.025) |