Safari Van M V6-262 4.3L (1985)
Inspect the seal that goes between the duct and the right hand outlet. The seal should fit snugly all the way around the duct. Repair if necessary.
Similarly, seal the left hand and center ducts to the outlets using foam tape to eliminate all leak paths.
Reinstall the outlets.
8.
A vacuum operated "hot water" shut off valve, P/N 14039637, may also be installed to lower the A/C outlet temperature when the A/C is used in
the "Max" A/C mode. The addition of the valve will lower the outlet temperature 2~- 3~F. The procedure for installation is as follows:
Installation instructions.
A.
Remove the engine cover, air cleaner assembly and the cold air inlet to the air cleaner.
B.
Remove plastic conduit from the 5/8" inlet heater hose, see Figure 20 on Page 1A-19 (86 manual).
C.
Remove radiator cap.
D.
Going as low on the 5/8" inlet heater hose as possible, CUT the hose and install the valve in the hose, securing it by using heater hose clamps.
NOTE: The valve must be positioned so that the linkage does not interfere with other components.
E.
Locate the A/C vacuum harness under the dash and splice a vacuum TEE into the hose to the recirculation door (BROWN hose). Drill a hole
in the cowl and install a vacuum hose 3/32 I.D. (inside diameter) from the vacuum tee to the fitting on the valve. NOTE: The edge of the
drilled hole must be protected from corrosion following the procedures for sheet metal repair in section 2C of the service manual. The
diameter of the drilled hole must be as close as possible to the outside diameter of the vacuum hose so that the hose can be sealed to the cowl
to prevent water leaks into the truck. Seal the hose to the cowl with weatherstrip adhesive or equivalent.
F.
Shorten the plastic conduit as necessary to permit reinstallation and reinstall it on the hose.
G.
Refill radiator to proper level and install the radiator cap.
H.
Start the vehicle and with the A/C control selector in the bi-level position, check the position of the lever on the shut off valve. Move the A/C
lever to "Max" A/C and recheck the position of the lever on the shut off valve. It should have moved to the opposite position on the valve to
shut off the water through the heater core.
I.
Reinstall the air cleaner, cold air inlet, and the engine cover.
C69 - FRONT AND REAR A/C
Verify that the A/C system is working normally by using the four (4) checks listed in the C60 Section of this bulletin. If the system checks normally, the
following modifications can be used to increase the C69 (front and rear A/C) system performance.
1.
Add 3/4 lb. of R-12 refrigerant to the system. This will increase the total charge to 1.69 kg. (3.75 lbs.). This will lower the rear A/C outlet
temperature 10~ - 15~F. Caution: Use proper safety equipment to prevent personal injury when charging the A/C system.
2.
Replace the front A/C motor as previously described in the C60 Section, No. 6.
