[Vwdiesel] Tattle tail plug in head?

[LBaird119 at aol.com]

  Most of those tattle tales are a surface, glued on device and it'd be glued 

to the frost plug.  The center melts out sure, but there's still a freeze 
plug 
behind it.  :-)  If the head reaches 250F there's likely no coolant left in 
there.
    Loren