Aeromotive 14136 User Manual

AEROMOTIVE
Part # 14136
’04-‘06 Subaru STI Fuel Rails
INSTALLATION INSTRUCTIONS

CAUTION:

Installation of this product requires detailed knowledge of automotive
systems and repair procedures. We recommend that this installation be carried
out by a qualified automotive technician.

Installation of this product requires handling of gasoline. Ensure you are
working in a well ventilated area with an approved fire extinguisher nearby.
Extinguish all open flames, prohibit smoking and eliminate all sources of ignition
in the area of the vehicle before proceeding with the installation.

When installing this product, wear eye goggles and other safety apparel as
needed to protect yourself from debris and sprayed gasoline.

WARNING!

The fuel system is under pressure. Do not open the fuel system until the
pressure has been relieved. Refer to the appropriate vehicle service manual for
the procedure and precautions for relieving the fuel system pressure.

Aeromotive system components are not legal for sale or use on emission controlled motor vehicles.

The enclosed Aeromotive fuel rails utilize o-ring sealed AN-08 style ports; these ports are NOT
PIPE THREAD and utilize NO THREAD SEALANT. To use the enclosed fuel rails in your vehicle’s
fuel system you must install the necessary adapter fittings and o-rings, high pressure fuel lines
and regulator to adapt your system to the configuration and ports of these fuel rails. Please call
for a catalog of the complete line of quality Aeromotive products.

When installing o-rings it is important to place a small amount of light oil on both the o-ring and
the mating surface to ease installation and prevent damaging the o-ring.

The following installation instructions are for a typical installation, for specific year and model
installation instructions please refer to your vehicles service manual.

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 bottom of 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 pipe insulator between the bottom of the OE fuel rail and the
tumbler valve.

13. Remove each of the injector spring clips.

Fuel Injector Pipe
Insulator

14. 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.

15. 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.

16. Coat the new fuel injector o-rings with a light oil to ease installation.

17. Carefully install the new injector o-rings on the injectors.

18. The backside (the end closest to the vehicles firewall) of the Aeromotive fuel rail should
have a port plug installed in it. Install the appropriate union fittings and o-rings in each
end of the fuel rail, we recommend Aeromotive p/n 15605 for AN-06 or Aeromotive
15607 for AN-08. The front of the fuel rail on the right side (passenger) of the motor will
be a close fit, we recommend using an AN-08 90-degree Male ORB hose end,
Aeromotive p/n 15665.