Jaguar XJ 1997–1998 — technical service bulletin
Bulletin 30331 · NHTSA communication 10011365 · issued Dec 1, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1998
model years
3
vehicle entries
Official summary
Replacement cylinder heads - preparation for normally aspirated engines with vvt feature - procedure. *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.