Ford Econoline 1999–2001 — technical service bulletin
Bulletin 15851 · NHTSA communication 637696 · issued May 1, 2002
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2001
model years
10
vehicle entries
Official summary
Some 5.4l windsor power improved engines may exhibit a slight oil leak or weep at the cylinder head to block joint. *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.