Valve Clearance Adjustment

NOTE: Hydraulic valve lifters are used. No valve adjustment is required. When valve and/or valve seat is machined, valve clearance is reduced and may cause improper valve operation. Different length push rods are available for correcting clearance. Valve lifter must be collapsed to check valve clearance.

With valve cover removed, position piston No. 1 at TDC of compression stroke. Completely collapse cylinder No. 1 intake valve lifter and hold valve lifter collapsed. Using feeler gauge, measure clearance between rocker arm and valve stem.
Clearance should be within specification. See COLLAPSED VALVE LIFTER CLEARANCE table. Replace push rod, if necessary, to obtain correct clearance.
Position crankshaft as specified in VALVE CLEARANCE CHECKING SEQUENCE table, and check appropriate valves. Replace push rods if clearance is not within specification.

CAUTION: DO NOT operate or crank engine after installing push rod until valve lifter has leaked down to normal operating position.

If push rod(s) is replaced, ensure corresponding cylinder piston is below TDC. It will be necessary to loosen or remove rocker arm to replace push rod.

COLLAPSED VALVE LIFTER CLEARANCE

Application	In. (mm)
Intake & Exhaust	.09-.19 (2.3-4.8)

VALVE CLEARANCE CHECKING SEQUENCE

Crankshaft Position ⁽¹⁾

Intake Valves

Exhaust Valves

Cyl. No. 1 At TDC

No. 1, 3 & 6

No. 1, 2 & 4

Rotate 360°

No. 2, 4 & 5

No. 3, 5 & 6

⁽¹⁾	Begin with cylinder No. 1 at TDC of compression stroke. Check corresponding valves clearance, rotate crankshaft 360 degrees, and recheck clearance of corresponding valves.