What kind of oil plug is this? (LAC)

[Huw Powell]

> When I first got my 5kcstq, it came with a special kind of oil drain
> plug.  I can't figure it so I'm asking for the list's advice.  Its a normal
> hex shape stamped "ARC INC" with "PATENTED" underneath (no number
> though).  Past the 14Mx1.50 thread there are 3 small holes with a spring
> visible inside.  The end has a captive brass end that look likes a temp
> sensor.  The top of the bolt head has a flat neoprene cap that you can lift
> up but won't come out (at least as far as I've pulled).  Appreciate any
> knowledge of what this gizmo is.  Right now I replaced it with a stock oil
> drain bolt.

That sounds remarkably like the oil temp sender (or dummy fill) setup
mounted in the bottom of the oil pump - right at the very front of the
oil pan... sort of... but if it was mounted in the oil pan in the
"correct" drain plug location, it just sounds like a rather creative
substitution for a mangled drain plug once upon a time (as so many fairy
tales begin)

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/