Mazda 626 1992–1997 — technical service bulletin
Bulletin 00598 · NHTSA communication 604035 · issued Nov 4, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1992–1997
model years
16
vehicle entries
Official summary
Experienceing a metallic tapping noise heard from the right ( rear ) cylinder head exhaust cam area. *yc
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.