Durango 4WD V8-5.9L VIN Z (1998)
Technical Service Bulletin # 07-03-99
Date: 991105
Engine - Overheats In High Ambient Temperatures.
NUMBER: 07-03-99
GROUP: Cooling
DATE: Nov. 5, 1999
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 07-07-98, DATED NOV. 27, 1998, WHICH SHOULD BE REMOVED
FROM YOUR FILES AND NOTED IN THE 1998 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO. 81-699-99003). ALL
REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE CHANGES TO PART NUMBERS, CHANGES TO THE
PROCEDURE, AND CHANGES TO THE TIME ALLOTTED TO PERFORM THE REPAIR.
SUBJECT:
Engine Overheats In High Ambient Temperatures
OVERVIEW:
This bulletin involves installing a revised fan, fan drive, and fan shroud.
MODELS:
1998 - 1999 (DN) Durango
SYMPTOM/CONDITION:
Some Durangos may experience a high engine temperature condition (temperatures greater than 116°C. (240°F.)) when the vehicle is operated in
stop-and-go traffic with ambient temperatures exceeding 32°C (90°F). The result from the high engine temperature may cause the following:
^
Engine Temperature Gauge To Read Higher Than Normal
^
Check Gauge Lamp To Illuminate
^
Warning Chime To Sound
^
Vehicles Equipped With Air Conditioning May Have The A/C System Disabled
NOTE:
THE POWERTRAIN CONTROL MODULE (PCM) IS DESIGNED TO DISABLE THE AIR CONDITIONING SYSTEM WHEN
ENGINE TEMPERATURES EXCEED A PREDETERMINED VALUE AND/OR THE A/C HIGH SIDE PRESSURE EXCEEDS 470 P.S.I.
+/- 20 P.S.I.. THIS IS A NORMAL CONDITION DESIGNED TO PROTECT THE ENGINE FROM OVERHEATING AND FROM
DAMAGING THE AIC COMPRESSOR. ONCE THE ENGINE TEMPERATURE AND/OR A/C HIGH SIDE PRESSURE HAS
LOWERED, THE PCM WILL TURN THE AIR CONDITIONING SYSTEM ON.
DIAGNOSIS:
1.
Examine the vehicle's cooling system for proper operation. The DRB III can be used to ensure that the engine temperature does not exceed 99° C
(210° F) during normal operating conditions. If the engine temperature exceeds 99° C (210° F) during normal operating conditions, the cooling
system must be inspected and repaired. Refer to the 1999 Durango Service Manual (Publication No. 81-370-9116), pages 7-9 through 7-20 for
information regarding Cooling System Diagnosis And Testing.
NOTE:
THIS BULLETIN ADDRESSES ENGINE OVERHEAT CONDITIONS THAT OCCURS ONLY IN STOP-AND-GO TRAFFIC WITH
AMBIENT TEMPERATURES EXCEEDING 32aC (90°F).
2.
If the vehicle's cooling system is operating normally and the customer identities that the vehicle exhibited the previously stated
SYMPTOM/CONDITION, perform the Repair Procedure.
PARTS REQUIRED:
1
52027709
Fan, Cooling
1
52029767AA
Drive, Fan
AR (1)
**52029012AD**
Shroud, Fan, Four Wheel Drive
AR (1)
**52028614AC**
Shroud, Fan, Two Wheel Drive
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
