Cooling System - Engine Overheats In High Temperatures
88cad04Bulletin No.: T-88-133
File in Group: 6B
Number: 18 Corp. Ref. No.: 716205
Date: May '88
SUBJECT: ENGINE OVERHEATS IN HIGH AMBIENT CONDITIONS
MODELS AFFECTED: 1985-1987 CIMARRONS
Some 1985-1987 Cimarrons equipped with the 2.8L V-6 engine may overheat in high ambient conditions without heavy engine loads (i.e., during low speed, light load driving). Symptoms are steam and coolant boil over. This condition should not be confused with an inaccurate temperature gauge reading, or with coolant afterboil on 1985-1986 models, which can be repaired by installing a larger overflow bottle, refer to Bulletin T-86-42.
This condition may be caused by a cooling fan shroud that allows too much underhood air recirculation. To repair this condition, install a new fan shroud. Also, to aid in reducing the underhood temperature, install a new front air deflector.
The parts required to repair this condition are listed below:
Fan Shroud Kit: P/N 22088901
Air Deflector: P/N 22532605
To repair this condition, the following steps should be performed:
1. Raise hood and install fender covers.
2. Disconnect the negative battery cable.
3. Remove the air cleaner cover and element.
4. Disconnect the MAF/MAT sensor connector.
5. Remove the air cleaner body assembly.
6. Remove hood latch plate (mark position for reinstallation) and disconnect release cable and position out of the way.
7. Raise car.
8. Remove the air deflector (3 bolts).
9. Disconnect the coolant fan wire connector.
10. Remove the lower fan shroud mounting bolt.
11. Lower car.
12. Remove the two upper fan shroud mounting bolts and remove the fan and shroud assembly.
13. Remove fan and motor from shroud and install in new fan shroud P/N 22088901.
14. Install fan and shroud assembly. Secure with the two upper mounting bolts.
15. Install release cable and hood latch plate.
16. Install air cleaner body, cover and element.
17. Connect MAF/MAT sensor connector.
FIGURE 1 - CUTTING AIR DEFLECTOR:
18. Cut the air deflector, P/N 22532605, along the formed bend line using a utility knife with a heavy duty blade, refer to Figure 1.
FIGURE 2 - INSTALLING AIR DEFLECTOR:
19. Trim any excess material that may be on the lower portion of the deflector that would prevent it from laying flat on the lower portion of original deflector.
20. Position the lower portion of the deflector over the original deflector so an equal amount of material extends from both sides. The lower edge should extend 1-1/2" lower than the original deflector's bottom edge, refer to Figure 2.
21. Clamp at both ends using small vise grip pliers and drill 7-1/8" holes as indicated in Figure 2.
22. Secure extension in place with 1/8" x 1/2" aluminum rivets using reinforcing washers on both sides.
23. Trim air deflector extension ends even with original air deflector ends.
24. Raise car.
25. Install lower shroud bolt and fan connector.
26. Install extended air deflector (three bolts).
27. Lower car.
28. Connect negative battery cable.
For warranty purposes use Labor Operation T6309 at 1.4 hours.