Valve Clearance Adjustment

Valve clearance may be set hot or cold. However, cold setting should be used as a preliminary setting value. Position No. 1 piston at TDC of compression stroke (valves 1 & 2 closed), and adjust valves 1, 2, 3, and 5. Rotate crankshaft one complete turn, align TDC mark with pointer and adjust valves 4, 6, 7, and 8.

VALVE CLEARANCE ADJUSTMENT

Valve	Hot	Cold
Intake	.008" (.20 mm)	.007" (.18 mm)
Exhaust	.014" (.36 mm)	.013" (.33 mm)

PISTONS, PINS, RINGS

Engine

PISTONS

PINS

RINGS

Clearance In. (mm)

Piston Fit In. (mm)

Rod Fit In. (mm)

Rings

End Gap In. (mm)

Side Clearance In. (mm)

1969-73

8R-C & 18R-C

.001-.002
(.025-.051)

.0002
(.0051)

.0002-.0004
(.0051-.0102)

.004-.012
(.102-.305)

.0012-.0028
(.0305-.0711)

.004-.012
(.102-.305)

.0012-.0028
(.0305-.0711)

Oil

.004-.012
(.102-.305)

⁽¹⁾

⁽¹⁾	Clearance is 0.0008 - 0.0028" (0.02 - 0.07 mm) for 8R-C and zero for 18R-C.