ROCKER ARM PISTON OPERATION CHECK



 1.Remove all of the ignition coils.
2.Remove the rocker cover.

3.Remove the oil feeder control valve.
4.Remove the oil pipe.
5.Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with "T" mark on the lower cover of timing belt.

6.The rocker arm piston operation check can be performed on rocker arms indicated by white arrow mark when the No. 1 cylinder piston is at the top dead centre on the compression stroke, and on rocker arms indicated by black arrow mark when the No. 4 cylinder piston is at the top dead centre on the compression stroke.
note If the rocker arm of No. 6 cylinder at the inlet side is moved up and down and the rocker arm is moved, No. 1 cylinder is at top dead centre on compression stroke. If the rocker arm of No. 6 cylinder at the inlet side is moved up and down and the rocker arm is not moved, No. 4 cylinder is at top dead centre on compression stroke.

7.While putting your hands over the oil passage hole located at the back of the oil feeder control valve installation hole in order to prevent air leakage, use an air blow gun to blow compressed air to the oil pipe installation hole at the right bank side. At that time, check that the rocker arm piston at the right bank side is operated.
note To surely perform the check, wrap the top of the air blow gun with a vinyl tape. Prevent compressed air leakage as much as possible. The pressure of 620 kPa or more is necessary for the compressed air.
8.Use the air blow gun to blow the compressed air to the oil pipe installation hole at the left bank side. At that time, check that the rocker arm piston at the left bank side is operated.
note To surely perform the check, wrap the top of the air blow gun with a vinyl tape. Prevent compressed air leakage as much as possible. The pressure of 620 kPa or more is necessary for the compressed air.
9.Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with "T" mark on the lower cover of timing belt.
10.Confirm the rest of the rocker arm pistons under the procedure 7 - 8.
11.When the rocker arm piston does not operate, replace the rocker arm assembly.
12.Install the oil pipe and the oil feeder control valve. (Refer to Camshaft and valve Stem Seal - Removal and Installation .)
13.Install the rocker cover.
14.Install all of the ignition coils.