ROCKER ARM PISTON OPERATION CHECK



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

3.Remove the oil control valve.
4.Remove the oil pressure switch.
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.Move the rocker arms on the No. 1 and No. 4 cylinders up and down by hand to determine which cylinder has its piston at the top dead centre on the compression stroke.
note 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.

7.While shutting up the oil passage hole at the depth of the oil control valve’s installation hole by finger not to leak air, blow compression air into the oil pressure switch installation hole by air blowgun. At this time, confirm that the rocker arm piston can operate.
note To fully confirm the check, prevent the compression air from leaking as much as possible by bind vinyl tape to the end of air blowgun. The compression air pressure is required more than 620 kpa.
8.Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with "T" mark on the lower cover of timing belt.
9.Confirm the rest of the rocker arm pistons under the procedure 7.
10.When the rocker arm piston does not operate, replace the rocker arm assy.
11.Install the oil pressure switch and the oil control valve. (Refer to Camshaft and valve Stem Seal - Removal and Installation .)
12.Install the rocker cover.
13.Install all of the ignition coils.