knock sensor cases cracked

[Kenneth Keith]

Brett Dikeman <brett at cloud9.net> wrote:
>
> I was pulling the hydraulic pump when I noticed that both knock
> sensor cases are cracked in 2-3 places each.  Does this mean they
> need replacement?
>
> They're also wired in with some strange wiring I haven't seen
> elsewhere on the car- looks silver, with a spiral-wrap cover.  Do
> others recall seeing the same?
>
> Brett

I think on the wiring, what you are seeing is what is normally
underneath some rubber/plastic sheathing, which originally covers the
aluminum foil-looking shielding.  As it ages, it gets brittle and just
flakes off.  On some or all of my cars with knock sensors, there are
sections of the black insulation that are missing.  I was thinking
about trying to recover them with something to protect the shielding
better.

Ken