Firestone Coil-Rite Air Helper Springs Rear Axle for 2006 Infiniti FX35  

Question:

Expert Reply:

I looked over the instructions (see link) for the # F4118 Coil-Rite Air Spring Kit. The installation looks pretty simple and straightforward. If you do not feel comfortable completing the installation yourself, the installation is something that any mechanic should not have any problem completing.

The vehicle is jacked up, and the frame supported by jack stands. Remove the rear wheels to allow easier access to the coil springs. The air bags are then compressed as described in the instructions so that they can be slid in between the coils of the spring. If necessary, the shock absorber can be disconnected from the lower shock mount to allow more clearance to slide the air bag in between the coil turns. A blunt instrument like a spoon shaped tire iron can be used to force the spring into place. Make sure you do not use anything with sharp edges or corners that would puncture the air spring.

From that point, the install involves running the air lines and mounting the air line valves and replacing the wheels.

To successfully complete the install, I recommend using a plastic tubing cutter like part # AL10530. The ends of the tubing need to be absolutely square before inserting them into the air bag and valves in order to prevent air leaks. To mount the fill valves, you will need a 5/16 drill bit. If you should need to remove the shock from the lower mount, you will need the appropriately sized wrench or socket.

expert reply by: Mike L

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