Valve Clearance Adjustment: SOHC

Disconnect negative battery cable. Remove PCV hoses from valve cover. Remove spark plug wire bracket from valve cover. Remove upper timing belt cover. Remove valve cover bolts, valve cover and gasket.
Position No. 1 piston on TDC of compression stroke. Measure clearance between rocker arm and valve stem on specified valves. See VALVE ADJUSTMENT SEQUENCE table. Adjust clearance if not within specification. See VALVE CLEARANCE SPECIFICATIONS table.
To adjust remaining valves, rotate crankshaft 360 degrees (one full turn) until No. 4 piston is at TDC of compression stroke. Measure valve clearance on specified valves. See VALVE ADJUSTMENT SEQUENCE table. Adjust clearance as necessary. Replace valve cover gasket (if necessary). Tighten valve cover bolts to specification. See TORQUE SPECIFICATIONS table.

VALVE ADJUSTMENT SEQUENCE

Piston No. On TDC	Adjust Intake Valves	Adjust Exhaust Valves
1	1 & 2	1 & 3
4	3 & 4	2 & 4

VALVE CLEARANCE SPECIFICATIONS ⁽¹⁾

Application

Clearance In. (mm)

DOHC

Exhaust

.008-.012 (.20-.30)

Intake

.004-.008 (.10-.20)

SOHC

Exhaust

.010 (.25)

Intake

.006 (.15)

⁽¹⁾	Adjust valve clearance with engine cold.

Fig 1: Valve Cover Bolt Tightening Sequence (DOHC)

Courtesy of ISUZU MOTOR CO.

Fig 2: Exhaust Valve Adjuster Shim Selection Chart (DOHC)

Courtesy of ISUZU MOTOR CO.

Fig 3: Intake Valve Adjuster Shim Selection Chart (DOHC)

Courtesy of ISUZU MOTOR CO.