Protege L4-1839cc 1.8L DOHC (1990)
Engine Mount: All Technical Service Bulletins
Engine - Idle Vibration or Rough Idle In DRIVE Range
Category B
Applicable Model/s 1990- '91 323/Protege'
Subject IDLE VIBRATION IN "D" RANGE
Bulletin No.
006/90
Issued
12/19/90
Revised
DESCRIPTION
Excessive vibration may be felt in the steering wheel and seats while idling in "D" range, especially when an electrical load is applied. For the proper
repair procedures, refer to the instructions in this bulletin.
NOTE:
The customer may also describe this complaint as a low or rough idle and may not necessarily complain of vibration. Therefore, confirm the customer
complaint carefully before attempting any repair.
VIN OF PRODUCTION CHANGE
The rubber used in No. 1 and No. 4 engine mounts and radiator lower mounts has been changed as follows:
No. 1 Engine Mount:
JM1BG****M0236751
November 1, 1990
No. 4 Engine Mount:
JM1BG****L1080134
May 1, 1990
Radiator Lower Mount:
JM1BG****L0186254 June, 1989
PARTS INFORMATION
PART NUMBER
NEW
OLD
DESCRIPTION
QTY
B456 39 040C
B456 39 040B
No. 1 Engine Mount Rubber
1
B455 39 070D
B455 39 070C
No. 4 Engine Mount Rubber
1
B61N 15 202A
B366 15 202B
Radiator Lower Mount
2
REPAIR PROCEDURE
1.
Check if the idle speed is within specification. If it is not, connect the system selector (49B0 19 9A0) and set TEST SW to SELF-TEST. Adjust
the idle speed to 750 rpm.
Idle Speed:
750 +/- 50 rpm
2.
Verify that the cooling fan coupler and harness are not pinched between the radiator, air cleaner and duct. If necessary, reroute the harness.
3.
Check to see if the condenser and the air conditioner pipe are rubbing. If necessary, adjust the position of the air conditioner pipe.
