>> In one scenario, the head would expand into open spaces, meaning the size
of
>> the threaded opening would shrink, making the plug more difficult to get
>> However, if the metal expands relationally (meaning the entire piece
>> basically scales up to a larger size), the hole would become bigger as
well.
The scoop on this: If the entire piece is at the same temperature, the
holes will be bigger. Ifjust the hole area were heated up (not a normal
situation) then the metal could conceivably pooch into the hole making it
smaller.
Now, i don't know which expands more, steel heads or spark plugs. If the
heads expand more, it might be easier to get the plugs out when hot...
huff
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:53:17 EDT