Valve Clearance: Adjustment

WARNING: This page is about a different variant/trim than selected.

CAUTION: Adjustment of valve clearance should be performed while engine is cold.

Set #1 cylinder piston to top dead center of compression stroke by rotating the crank pulley clockwise using the socket wrench.
NOTE: When the arrow mark (A) on cam sprocket (LH) comes exactly to the top, #1 cylinder piston is brought to the top dead center of compression stroke.

Fig 1: Identifying Arrow Mark On Cam Sprocket
Courtesy of SUBARU OF AMERICA, INC.
Adjust the #1 cylinder valve clearance.
1. Loosen the valve rocker nut and screw.
2. Set a suitable thickness gauge.
3. While noting the valve clearance, tighten the valve rocker adjusting screw.
4. When the specified valve clearance is obtained, tighten the valve rocker nut.
Tightening torque:

9.75 N.m(1.0 kgf-m, 7.2 ft-lb)
CAUTION:
- Insert a thickness gauge in as horizontally as possible with respect to the valve stem end face.
- Adjust the exhaust valve clearances while lifting-up the vehicle.
Valve clearance:

Intake

0.20±0.04 mm (0.0079±0.0016 in)

Exhaust

0.25±0.04 mm (0.0098±0.0016 in)

Fig 2: Adjusting Valve Clearances
Courtesy of SUBARU OF AMERICA, INC.
Adjust the valve clearance in #3, #2 and #4 cylinder in the same adjustment procedure as #1 cylinder.
NOTE:
- Be sure to set the cylinder pistons to their respective top dead centers on compression stroke before adjusting valve clearances.
- By rotating the crank pulley clockwise every 180° from the state that #1 cylinder piston is on the top dead center of compression stroke, #3, #2 and #4 cylinder pistons come to the top dead center of compression stroke in this order.
Ensure the valve clearances of each cylinder are within specifications. If necessary, readjust the valve clearances.