A/T Cooler Line - Fluid Leaks At Hose Clamps

91pontiac14

Bulletin Number: 91-7-40
Reference Number: 107104
Publish Date: 11/91


Subject: TRANSAXLE COOLER LINE FLUID LEAKS AT HOSE CLAMPS (INSTALL A SECOND CLAMP)

Models
Affected: 1991 BONNEVILLE MODELS

FIGURE 1:

FIGURE 2:

Some owners of 1991 Bonneville models may comment of a transaxle fluid leak at any of the cooler hose to pipe connections (see Figures 1 and 2) which may be caused by a lack of interference fit between the hose and pipe. To correct this condition, it will be necessary to install a second clamp at the connections shown in Figure 1 and, if equipped with auxiliary oil cooler, (part of option V92 Trailer Towing) replace the hoses shown in Figure 2.

FIGURE 1:

FIGURE 3:

SERVICE PROCEDURE:

1. Raise vehicle to access hose to pipe worm gear clamps at positions shown in Figure 1.

2. Loosen both clamps.

3. Push hoses over stop (2nd) beads approximately 5 mm (see Figure 3).


4. Slide the clamp over the stop bead and torque to 1.8 N-m
.4 N-m (16 lbs.in. +/- 3.5 lbs.in.).

5. Install a second screw gear clamp (Part Number 22527587 or equivalent) over the initial (1st) bead and torque as in step 4.

6. If equipped with auxiliary oil cooler proceed with Step 7. If not equipped with auxiliary oil cooler, lower vehicle. Check fluid level and add as needed.

7. Remove right side headlamp module.

8. Loosen four (4) clamps (see Figure 2) and remove and discard cooler pipe to auxiliary cooler hoses.

9. Install new hoses, part number (upper) 25608924, (lower) 25608925 and torque clamps to 1.8 N-m +/- .4 N-m (16 lbs.in. +/- 3.5 lbs.in.).

10. Reinstall right side headlamp module.

11. Check transaxle fluid level and add as needed.


VIN BREAKPOINT Start of Production M1227785

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

OPERATION DESCRIPTION TIME

T5223 Transaxle oil cooler leak - .3
Repair

Add .5 to replace hose if equipped with auxiliary oil cooler.