Engine - Overheating
Number: 86-174Section: 6B
Date: OCT., 1986
Subject: ENGINE OVERHEAT 5.OL V-8 (LB9) VIN CODE "F" TUNED PORT INJECTION
Model and Year: 1985-86 CAMARO WITH A/C
TO: ALL CHEVROLET DEALERS
Some owners of 1985-86 Camaros equipped with an air conditioner and a 5.0L V-8 (LB9) tuned port injection engine, are returning to dealers because of an engine overheating condition.
This condition may be caused by a loss of engine coolant and/or owner aggressive driving habits, and occurs more frequently in situations where the terrain is hilly and ambient temperatures reach approximately 100 degrees F.
To increase air flow and provide additional engine cooling, a fan module kit and brace rods are available from WDDGM. Also required, but ordered separately, is a 120 AMP generator.
The following procedure is recommended when repairing related engine overheating problems.
PROCEDURE
1. Determine if engine has blown head gaskets due to severe overheat or boil over. Replace gaskets as required.
2. Check for the presence of any possible damage to the radiator air deflector extension and Rt. and Lt. radiator air side baffles.
3. Check for proper electric cooling fan direction of rotation and correct temperature gage/sensor operation.
4. Check engine coolant. Add as necessary. Replacement coolant must be a 50/50 mix concentrate of good quality Glycol and water to achieve the design intent coolant boil temperature.
5. Thermal cycle
A. Drive vehicle for at least 10 miles without boil over.
B. Allow vehicle to cool down overnight.
C. Check coolant at recovery bottle and at radiator filler neck. Add coolant in both places as necessary.
6. Repeat cycle until no additional coolant is required.
7. If engine overheating still exists, install the parts listed below following instructions included in the fan module kit.
PART NAME P/N
Fan module kit 14101637
Brace Rod 14044877 (1 Required)
Generator 1101258
Labor Operation Number: T 1181
Labor Time : 3.7 hours