Ford Expedition 1997–1998 — technical service bulletin
Bulletin 98-4738 · NHTSA communication 607152 · issued Sep 1, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1998
model years
8
vehicle entries
Official summary
Cold engine knock 5.4l action. *ak
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.