Air Suspension - Vehicle Sag/Spring Leak-Down
Article No. 86-7-4AIR SUSPENSION - VEHICLE SAG
- SPRING LEAK - DOWN WHEN COLD - VEHICLES BUILT BETWEEN 7/31/85 AND 12/20/85
LINCOLN-MERCURY 1985-86 MARK VII, CONTINENTAL
The electronic air suspension system may leak-down when the vehicle is parked for twenty-four hours or less and the air temperature is 30~F or less. The resulting vehicle sag may be caused by leaking air spring solenoid O-ring seals, which may be slightly undersize and shrink when cold. This condition can be serviced by replacing the two (2) small O-ring seals on the air spring solenoids.
To verify the above condition, use these steps:
A. Determine if the vehicle sagged in less than twenty-four hours.
B. Was the vehicle parked in temperatures of 30~F or below.
C. Did the vehicle sag down to the jounce bumpers.
D. Perform test steps 1, 2, and 3 of the air suspension diagnostic procedure with the vehicle at room temperature. Refer to the 1986 Car Shop Manual, Volume B, Section 14-40.
If the vehicle passes Step D and meets the requirements of Steps A, B, and C, replace the air spring solenoid O-rings where required. If the vehicle fails Step D, proceed with the diagnostic procedure and repair as necessary.
Air Spring Solenoid - O-ring Seals
Removal
1. Refer to the 1986 Car Shop Manual, Volume B, Section 14-40, and remove air spring solenoid.
Figure 3:
2. Remove two O-rings from solenoid and discard. Use care not to scratch or damage the O-ring sealing surface (Figure 3).
3. Using a clean, lint-free cloth, wipe off the end of the solenoid (Figure 3).
Figure 4:
4. Remove the O-ring from the air spring end cap (Figure 4). Inspect the O-ring and replace if damaged.
5. Clean out the inside of the solenoid housing with a clean, lint-free cloth.
Figure 4:
Installation
1. Apply a light coating of silicone dielectric compound, D7AZ-19A331-A, or equivalent to the large O-ring.
2. Install large O-ring into solenoid housing (Figure 4).
Figure 5:
3. Install two new small O-rings on air spring solenoid and apply a light coating of silicone dielectric compound, D7AZ-19A331-A, or equivalent, to the O-rings (Figure 5).
4. Refer to the 1986 Car Shop Manual, Volume B, Section 14-40, and install air spring solenoid.
PART NUMBER PART NAME CLASS
E4LY-5312-A O-ring Seal - Pkg. of 2 C
D7AZ-19A331-A Silicone Dielectric Lube A
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP5312A86
TIME: 1.2 Hrs. DLR. CODING: Basic Part No. 5311 - Code: 11
(Figures 3-5 on following pages)