Ford Explorer 1998–1999 — technical service bulletin
Bulletin 12583 · NHTSA communication 605310 · issued Mar 1, 1999
Technical service bulletin
communication type
Engine and Engine Cooling
component
1998–1999
model years
4
vehicle entries
Official summary
Some vehicles equipped with 4.0l ohv engines may exhibit a thumping noise from the cooling system. *tt
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.