GLC L4-1490cc 1.5L (1984)
Altitude Compensator: Technical Service Bulletins
Altitude Compensator - Modified
Category 1A
Applicable Model/s 1984 GLC
Subject SERVO DIAPHRAGM AND HIGH ALTITUDE
COMPENSATOR MODIFICATION
Bulletin No. 035/83
Issued
12/23/83
Revised
3/28/84
Since this service bulletin is a replacement of the previous one, the former category is used. Please discard the previous service bulletin and insert this
bulletin into the binder instead of the previous one.
IDENTIFICATION MARKS
DESCRIPTION
To improve idle stability and low speed driveability (around 2000 rpm) in high altitude areas, air conditioner servo diaphragm and high altitude
compensator have been modified as follows.
1.
The return spring in the servo diaphragm has been weakened.
2.
The starting point of the high altitude compensator operation has been changed from 3608 ft to 2100 ft and the diameter of the orifice used
for EGR compensation has been enlarged.
These modifications took place since the production date of November, 1983.
VIN OF PRODUCTION CHANGE
Sedan:
JM1BD221 E0759911 November, 1983
3 Door Hatchback:
JM1BD231 E0760602
November, 1983
5 Door Hatchback:
JM1BD241 E0750333
November, 1983
PARTS INFORMATION
PART NUMBER
NEW
OLD
DESCRIPTION
QTY
INTERCHANGEABILITY
8325 13 950A
8325 13 950
Servo Diaphragm
1
NEW to OLD
E563 23 950
Servo Diaphragm*
NEW to OLD
(For Service Parts Only)*
1
E563 20 480B
E563 20 480A*
High Attitude Compensator*
1
NEW to OLD
Note:
The modified parts have an identification mark as shown below.