Celebrity V6-173 2.8L (1989)
Temperature Sensor (Gauge): Customer Interest
Instruments - Indicated Overheat Inaccurate
Number:
89-173-8C
Section:
8C
Date:
JUNE 1989
Subject:
INDICATED OVERHEAT
Model and Year:
1988-89 A CAR WITH 2.8L ENGINE AND ANALOG GAGE PACKAGE
TO:
ALL CHEVROLET DEALERS
On Celebrity models with 2.8L engine and optional analog gage package, the temperature reading may show a reading to the right of center (220
degrees). While there are no other indications of overheat, and the engine is not actually overheating, the reading may cause customer concern.
Repair Procedure:
1.
Attach a scanner to the ALDL connector. While driving the vehilce at normal highway speed, verify that the engine temperature shown on the
scanner does not exceed 220 degrees F, or 105 degrees C. If this temperature is exceeded, look for the cause of actual engine overheat.
2.
Turn ignition to "Off" position.
3.
Locate the temperature sender in the rear cylinder head, near the left end of the head. Disconnect the sensor. Install a 20 ohm, 1/4 watt resistor in
the wire harness to the sensor. There are two wires in the connector - one for the sensor, and a black wire for the temperature lamp switch. Install
the resistor in the colored wire. Be sure to solder the connections and tape the wire. Reconnect the sensor.
4.
Road test to insure that the gage now operates properly.
Labor Operation:
T1485
Labor Time:
0.8 Hours
