Engine - Block Heater Update
No.: TSB-01-11-002DATE: May, 2001
MODEL: All Models
SUBJECT:
ENGINE BLOCK HEATER UPDATE
This bulletin supersedes TSB-99-11-009, issued November 1999, to include block heater information for 2001 models.
PURPOSE
This bulletin provides specific vehicle application and general information on engine block heaters. The chart shown identifies the appropriate block heater kit, installation location, and positioning direction for most vehicles distributed by Mitsubishi Motor Sales of America, Inc.
GENERAL DESCRIPTION
Engine block heaters are used to maintain coolant fluidity inside the engine's coolant passages. Coolant fluidity is a factor when vehicles are parked in extremely cold areas (0°F or less) for extended periods of time. A block heater consists of a heating element, O-ring, electrical connector, and a power cord.
The block heater is the same shape and diameter as the engine's core plugs and permanently replaces a designated core plug. Refer to the chart included for block heater part numbers, application information, and core plug location and position.
To operate the block heater, attach the power cord to the block heater electrical connector and route it safely inside the engine compartment. Plug the male end of the power cord into a standard 120V household electrical outlet. When operated overnight, the block heater will help prevent engine coolant from thickening and/or freezing. This allows the engine to start and run normally in very cold ambient temperatures.
Engine Core Plug Locations
Refer to the illustrations along with the application chart in this bulletin to identify engine core plug locations and block heater installation position.
Block Heater Element Location and Direction
NOTE:
Position indicated by direction of the heater coils, not the electrical connector.
Block Heater Installation
!WARNING
To avoid personal injury, be sure to safely release the pressure from the cooling system and drain the coolant before installing the block heater.
In addition to the instructions supplied with the block heater, refer to the following installation and usage procedures:
1. Locate the appropriate core plug location and remove the core plug (see above). Do not attempt to install the block heater in a core plug location not specified in this bulletin.
2. Lubricate the O-ring with clean engine coolant.
3. Insert the block heater with the heating element pointed in the proper direction as indicated on the application chart in this bulletin.
4. Tighten the block heater screw to the exact torque specified in the installation instructions.
5. Firmly attach the power cord to the block heater. Route the cord away from hot or moving parts in the engine compartment.
6. Fill the cooling system with a clean, properly mixed ratio (normally 50/50) of coolant and water. Do not use cooling system additives designed to prevent leaks.
!CAUTION
If the heating element is operated while not immersed in coolant, it will quickly burn out and the block heater will be inoperable.
PARTS INFORMATION
Refer to the block heater application chart.