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January 23, 1997 Service bulletin

Some 4.0L engines with block heaters may experience coolant leaks due to interference with the block

Ford technical service bulletin BC3491972301 for 1997 Ford Explorer, 1997 Ford Ranger and 1997 Ford Aerostar.

Bulletin number
BC3491972301
Component
Engine and engine cooling: engine: diesel
Summary
Some 4.0l engines with block heaters may experience coolant leaks due to interference with the block. Jd

Owners of these vehicles have filed 224 complaints in the engine category.

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