Aeromotive 14135 - 04-06 SUBARU 2.0L WRX FUEL RAIL SYSTEM - Manual (Page 2)

1. Once the engine has been allowed to cool, disconnect the negative battery cable, relieve
fuel system pressure and drain engine coolant, referring to the appropriate vehicle service
manual for the procedure on doing so.
2. First the factory manifold must be removed using the following steps, for specific details
and instructions refer to the factory service manual.
3. Remove the turbo intercooler (top mount only) and air intake duct.
4. Disconnect all the wiring harness connections, noting where each goes.
5. Remove the bolts holding accessories and brackets to the manifold.
6. Disconnect all vacuum lines from the manifold, noting where each goes.
7. Remove the tumbler valve bolts connecting them to the heads, keeping the intake bolted
to the top of the tumbler valve. In some cases it may be easier to remove the tumbler
valves from the intake manifold.
8. Disconnect the fuel lines from the fuel rail assembly located on the driver side by the
firewall, placing clean shop towels around the fuel lines to catch any gasoline that may be
spilled during their removal
9. Carefully lift off the intake manifold, tumbler valve, OE fuel rail assembly.
10. Remove the three bolts holding the OE fuel lines to the intake manifold.
11. Remove the four bolts holding the OE fuel rails to the tumbler valves.
12. Remove the OE fuel rail assembly from the intake manifold assembly, being careful not
to damage the fuel injector o-rings.
13. Place clean shop towels around the injectors to catch any gasoline that may be spilled
during their removal. Remove each of the injectors from the manifold by gently pulling
upward on each of the injectors.
14. Remove the old o-rings from the fuel injectors, inspect the injectors for any dirt or debris
and clean if needed. It is suggested that the old o-rings be replaced, contact your local
auto parts store for replacement o-rings.