Engine, Radiator Mounts - Vibration During Idle in DRIVE

91mazda03

Bulletin No. 010/91
Issued 10/3/91
Revised


Category B


Applicable Model/s 1988 -'91 626/MX-6


Subject
IDLE VIBRATION IN DRIVE


DESCRIPTION

The steering wheel and seat on some 626/MX-6 vehicles may vibrate too much while idling in drive ("D"). The vibrations may be stronger when an electrical load is applied (headlamps, wipers, etc.). This may be caused by a combination of engine and radiator mounts.

To correct this problem, install new engine and radiator mounts using the Inspection and Repair Procedure below. New engine and radiator mounts are now installed during production (see VIN of Production Change below).

NOTE:
This Service Bulletin replaces Service Bulletins, Category 1, No. 042/89 and Category B, No. 001/90.


VIN OF PRODUCTION CHANGE

No. 1 & 2 Engine Mounts
1991 JM1GD * * * * M1902957 October 1, 1990
1YVGD * * * * M5131853 November 7, 1990

Lower Radiator Mount
1989 Non-Turbo JM1GD * * * * K1769601 June 1, 1989
1YVGD * * * * K5245888 June 24, 1989

1991 Turbo JM1GD * * * * M1901869 September 1, 1990
1YVGD * * * * M5120718 October 2, 1990


INSPECTION & REPAIR PROCEDURE

1. If the steering wheel and seat vibrate too much at idle, perforrn the following steps.

2. Check if idle speed is 725-775 rpm in "P." If not, adjust it to 750 rpm with test connector grounded.

3. Install new lower radiator mounts.

4. Center the radiator stud in the damper of the radiator upper bracket. See Section "3" or "E" of the Workshop Manual.

Figure 1:

5. If necessary, move the A/C pipe away from the radiator. Figure 1.

6. If hood rattles, adjust the hood lock.

7. Install new No. 1 and No. 2 engine mounts. See Section "1" or "B" of the Workshop
Manual.

Figure 2:

8. Remove and discard the muffler hangers and rubbers. Figure 2.

9. Install the hanger bolts into the body to prevent water entry.

10. If the steering wheel and seat still vibrate too much, ground the test connector. Adjust idle speed to 950-1000 rpm in "P." Disconnect the test connector.


PARTS INFORMATION

APPLICABLE
PART NUMBER DESCRIPTION MODEL
M002 39 040B No. 1 Engine Mount Non-Turbo
GJ28 39 040E No. 1 Engine Mount Turbo
GJ23 39 050C No. 2 Engine Mount All
F202 15 202B Lower Radiator Mount All



WARRANTY INFORMATION

Warranty Type Code: A
Customer Comment Code: 83
Damage Code: 97
Part No. of Main Cause: No. 1 Engine Mounts
M002 39 040B (Non-Turbo)
GJ28 39 040E (Turbo)
No. 2 Engine Mounts
GJ23 39 050C (All)
Lower Radiator Mount
F202 15 202B (All)
Operation No. & XX0376RX (Includes R&R of No. 1 & No. 2 Engine Mounts)
Labor Hour: 1.0 Hr.
XX0331R2 (All repairs except R&R of No. 1 & No. 2 Engine Mounts)
0.4 Hr.