[Vwdiesel] Injector --Heatshields--why change ?.Rabbit 1980-1982.

[LBaird119 at aol.com]

  Usually not even a concern about annealing them.  The center originally
puckers up a little where it meets the injector nozzle.  This bends down
and seals against it when tightened.  If reused, the seal can leak carbon
into the injector housing, which isn't a problem in itself until you try to
disassemble the injector at some time.  It also can let compression
gasses leak out between the injector and head.  That could erode the
threads.  To reuse one you need to pucker the center back up a little.
I rest them on a socket the size of the OD then use a large center point
punch to tap it back out.  The center punch has the right taper to the
point to set in the hole and push the surrounding metal just right.  If
there are cracks then toss.  It's generally just considered easier to
replace.  :)
     Loren