Impreza WRX STI F4-2.5L DOHC Turbo (2007)
Valve Clearance: Testing and Inspection
Valve Clearance
INSPECTION
NOTE:
Inspection and adjustment of valve clearance should be performed while engine is cold.
1) Set the vehicle on a lift.
2) Disconnect the ground cable from the battery.
3) Remove the air intake duct.
4) Remove a bolt which secures timing belt cover (RH).
5) Lift up the vehicle.
6) Remove the under cover.
7) Loosen the remaining bolts which secure timing belt cover (RH), then remove the timing belt cover.
8) Lower the vehicle.
9) When inspecting #1 and #3 cylinders
(1) Pull out the engine harness connector together with bracket from air cleaner upper cover.
(2) Remove the air cleaner case.
(3) Disconnect the connector of ignition coil.
(4) Remove the ignition coil.
(5) Place a suitable container under the vehicle.
(6) Disconnect the PCV hose from the rocker cover (RH).
(7) Remove the bolts, then remove the rocker cover (RH).
10) When inspecting #2 and #4 cylinders
(1) Disconnect the battery cable, and then remove the battery and battery carrier.
(2) Remove the secondary air pump.
(3) Disconnect the connector of ignition coil.
