B006/95 ENGINE IDLE VIBRATION IN D RANGE

Note: This bulletin contains revised sections. Please update your records accordingly.

APPLICABLE MODELS/VINS

1990-94 323/Protege vehicles with an automatic transaxle and B6-SOHC,BP-SOHC and BP-DOHC engines.

1992-94 MX-3 vehicles with an automatic transaxle and B6-DOHC engine.

NOTE: Refer to the Parts Information section of this bulletin for additional VIN information.

DESCRIPTION

Excessive vibration may be felt through the steering wheel and in the seat while idling in "D" range. Vibration is most noticeable when electrical loads are applied. If a customer complains of excessive vibration, follow the procedures in this bulletin to correct the problem.

NOTE: Customers may also describe this complaint as a rough idle.

REPAIR PROCEDURE

1. Inspect the vehicle for excessive vibration. If vibration is excessive, proceed to step 2. If vibration is caused by a rough idle, refer to the workshop manual for troubleshooting and repair procedures.

2. Check the idle speed. If the speed is not within 750 +/- 50 rpm, connect the system selector (49B0 19 9A0) and set the selector "TEST SW" to self-test. Adjust the idle speed to specification.

3. Verify that the cooling fan coupler is not pinched between the radiator, air cleaner and duct.

4. Check for interference between the condenser and the A/C pipe. Refer to Figure 1. Adjust as necessary.

   Fig. 1

   

5. Check radiator upper mounting bracket rubber stud. The stud should be centered in the bracket dampener and the stud should extend no more than 0.06 in. (1.5mm) from the top of the mount as shown in Figure 2.

   If stud is not centered or is above the top of the mount, adjust as follows, if not, proceed to step 6:

   1. Loosen upper radiator brackets and adjust position of bracket to stud.
   2. Loosen clamp on upper radiator hose and adjust radiator position. Refer to Figure 2

      Fig.2

      

6. If the vehicle is within the following VIN range, replace the lower radiator mount.

   VIN = JM1BG****L0100001 through JM1BG****L0186253

7. Replace the following engine mounts.

   NOTE: Follow all procedures when installing engine mounts. Follow these instructions carefully to ensure accurate engine/mount alignment.

No. 4 Engine Mount

1. Remove battery and battery tray.

   NOTE: Record all preset audio stations. Removal of the lower left splash shield and A/C hose mounting bracket will facilitate removal and replacement procedures.

2. Install engine support (49 G017 5A0).

3. Remove and discard No. 4 engine mount and replace with new part.

4. Tighten nuts and bolts to the proper torque.

Fig. 3

No. 1 & 2 Engine Mounts

1. Loosen bolts "B" from the engine mounts.

2. Remove bolts "C" from engine mounts.

3. Remove No. 2 engine mount and replace with a new part.

   NOTE: Install in reverse order of removal. Snug up bolts, do not torque.

4. Loosen bolts "D" and "E" on No. 1 engine mount.

5. Remove bolt "D".

   NOTE: Adjust engine support to allow clearance for bolt "D" removal.

6. Move engine forward. No. 1 engine mount will rotate on bolt "E".

7. Remove bolt "E" and remove No. 1 engine mount. Replace with new part.

   NOTE: Install in reverse order of removal. Snug up bolt, do not torque.

8. Install battery and battery tray.

9. Start engine and idle for brief period of time (approximately 1 min.).

10. Stop engine and tighten bolts "B" on the No.2 engine mount.

11. Check clearance at No. 1 engine mount.

12. Tighten bolts "B" on the No. 1 engine mount.

13. Re-check clearance. Clearance should not change.

14. Start engine, turn on electrical loads and A/C. Set parking brake firmly and shift vehicle into "D" range.

15. Re-check clearance. Clearance should not change.

16. Verify repair, reset audio station and clock.

    Fig. 4

    

    Fig. 5

    

PARTS INFORMATION

Part Number	Description	Applicable VIN Range
B456 39 040C	No. 1 Engine Mount Rubber	JM1BG****L0100001 - R0999999
B1Y239 010	No. 1 Engine Mount Bracket	All Applicable Models
9YA09 1205	Bolt (for No. 1 Engine Mount)	All Applicable Models
9YB04 1207A	Flange Nut (for No. 1 Engine Mount)	All Applicable Models
EA77 39 050	No. 2 Engine Mount Rubber	All Applicable Models
EA79 39 020	No. 2 Engine Mount Bracket	All Applicable Models
9YA02 1215	Bolt (for No. 2 Engine Mount)	All Applicable Models
B455 39 070D	No. 4 Engine Mount Rubber	JM1BG****L0100001 - L0180133
B61N 15 202A	Lower Radiator Mounting Bracket	JM1BG****L0100001 - L0186253

NOTE: Refer to the vehicle VIN when ordering applicable parts,

WARRANTY INFORMATION

(Applies To Verified Customer Complaints On Vehicles Covered Under Normal Warranty. Refer To The SRT Microfiche For Warranty Terms)

Warranty Type:

A

Symptom Code:

83

Damage Code:

97

Part Number Main Cause:

B456 39 040C, B455 39 070D, B61N 15 202A or EA77 39 050

Operation Number:

XX0731R1 / 0.9Hrs (JM1BG***R0999999 and lower)
XX0731R2 / 0.9Hrs (JM1BG****L0186253 and lower)
XX0731R3 / 1.2Hrs (JM1BG****L0180133 and lower)
XX0731R4 / 0.9Hrs (92-94 MX-3 and vehicles lower than JM1BG****S0100000)   There are 4 repair procedures depending on the vehicle  VIN