Engine knock is the sharp, metallic sound that cuts through the hum of a healthy engine. At its core, engine knock is a problem of timing. In a knocking engine, parts of the air-fuel mixture don't ...

Restarting the engine proved that the knock was no quieter so once again, we dropped the pan, discarded the remaining rod shims, and replaced all the parts that gave us repeated access. At this point ...

The demon of engine knock is something an owner of a traditional high-performance Pontiac knows all too well. An engine designed when 102-octane high test was at almost every fuel station in the ...