Ford Expedition 1997–1999 — technical service bulletin
Bulletin 7155 · NHTSA communication 6090791 · issued Oct 1, 1999
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1999
model years
9
vehicle entries
Official summary
Vehicles equipped with windsor engines only may exhibit an engine knock at initial cold startup. *tt
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.