Instruments - Temp Gauge Sending Unit Torque & Sealant

88mitsubishi06

SUBJECT:
TEMPERATURE GAUGE SENDING UNIT TORQUE AND SEALANT - SERVICE MANUAL UPDATE

NO. TSB-88-07-001

DATE August, 1988
MODEL As noted

TSB Revision

PURPOSE

To insure reliability and prevent leakage, the torque and thread sealant specifications for the Coolant Temperature Gauge Sending Unit are changed in some 1988 and 1989 Service Manuals. (Torque for the Coolant Temperature Sensor and the Thermo Switch are unchanged.)

SERVICE MANUALS AFFECTED

The Service Manuals and pages affected are listed below. On the Specifications page, the torque specification for the Coolant Temperature Gauge Sending Unit must be increased, and on the Installation Instructions page the torque callout for the Coolant Temperature Gauge Sending Unit must be changed to the new value. The sealant specification must also be changed.

1988 Cordia/Tredia Page 7-4, Page 7-11
1988 Galant Sigma Page 7-4, Page 7-16
1988 Mirage Page 7-6, Page 7-29
1988 Montero Page 7-4, Page 7-17
1988 Truck Page 7-4 (Note 1), Page 7-20
1988 Van/Wagon Page 7-4, Page 7-18
1989 Galant Page 7-3, Page 7-28

Note 1: The torque specifications for the Coolant Temperature Gauge Sending Unit and the Coolant Temperature Sensor are transposed.

As reference to this bulletin, please write the correct specifications on the affected pages, and write the TSB number in the revision boxes on the affected pages.

SPECIFICATION REVISED

The tightening torque specification for the Coolant Temperature Gauge Sending Unit is increased to 7-9 ft.lbs. The former specification was 6-7 ft.lbs. Torque specifications for the Coolant Temperature Sensor and the Thermo Switch are not affected by this bulletin. The specified sealant is now 3M No. 8660 or equivalent.

INSTALLATION INSTRUCTIONS

Before installing the Coolant Temperature Gauge Sending Unit in the intake manifold, apply 3M No. 8660 or equivalent sealant to the threads. Then torque the sending unit to 7-9 ft.lbs., rather than the 6-7 ft.lbs. given in the Service Manual. These steps will insure a good, leak-free installation.