Evaporator Case - Water Leak To interior

Bulletin No. T 84-33
File In Group 10
Number 56
Date Jan. '84
SUBJECT: EVAPORATOR CASE WATER LEAK IN PASSENGER COMPARTMENT

MODELS AFFECTED: 1983 CIMARRON

FIGURE 1 - Blower Assembly Location:

Some 1983 Cimarrons may experience a condition of water leaking into the passenger compartment. This leakage may be caused by a restricted air conditioning evaporator drainage tray check valve and/or the windshield washer container interfering with the HVAC plenum drain valve.

If the evaporator drainage tray check valve, Figure 1, becomes obstructed, restricted or "sticks" closed, the drain off water from the evaporator core is allowed to fill the evaporator case and eventually overflow into the passenger compartment. Closely examine the drainage tray check valve for this condition.

FIGURE 2 - Windshield Washer Assembly Location:

Interference between the windshield washer and HVAC plenum drain valve will cause water to collect in the plenum and back up into the air intake. To correct this condition, remove the windshield washer container and elongate the outboard bottle mounting hole as shown in Figure 2.

Additional checks should also be made to insure that the evaporator case has the proper sealing along the dash cowl area.
For warranty purposes, use Operation No. T6087 at .3 hour.