MN-126 Air Lift Instructions
If your vehicle is equipped with vibration dampers between the turns of the coil, it is necessary that these be removed before installing the air springs.Their function will be replaced by the air spring. Some mid-size GM vehicles have a solid cup located on the lower spring seat which will not allow the air line to exit the coil. It is necessary to removed this cup before installing the air spring.
I. Preparing the Vehicle
Before beginning the installation, check the clearance from coil spring to exhaust. It is common in your application for the exhaust to be very close to the coil. If there is not more than 2″, you will need to move the pipe for additional clearance.
1. Jack up rear of vehicle or raise on hoist.Support frame with safety stands. Lower axle or raise body of vehicle until suspension is fully extended.
2. Install heat shield kits. Separate instructions are included in heat shield package.
3. Remove plastic cap from barbed stem on end of cylinder.Exhaust the air from the cylinder by rolling it up toward barbed stem. Replace cap on stem to hold flat shape.
4. If necessary, additional clearance between the coil turns may be obtained by removing the shock absorbers from the lower shock mountings and lowering the suspension an additional one to two inches. CAUTION: Observe tension on brake air line. Do not strain.
II. Installing the Air Cylinder
1. For installing the air cylinder in 1991 and up Crown Victorias, Mercury Grand Marquis, Suburbans, 4DR-4WD Tahoes–Yukons, Trailblazers, Envoys, Bravadas, Avalanches, and Escalades use step 1b.
a. Insert flattened air cylinder into coil spring through lowest
opening with stem at the bottom (Figure 1a).
b. IMPORTANT: For Suburbans, Tahoes, Yukons, Trailblazers,
Envoys, Bravadas, Avalanches,and Escalades it will be necessary to trim the rubber isolator at the top for the valve stem clearance (Figure 2). Insert flattened air cylinder into coil spring through lowest opening with the stem at the top.
2. Push the cylinder up within the coil by hand or with a blunt instrument such as a spoon-type tire iron.
3. When the cylinder is completely within the coil, remove the cap and allow the cylinder to assume its “as molded” shape.
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