[s-cars] POS maintenance

[Mark Turczyn]

Neil-

I always thought it was a conductive grease they put under
transistors and such to conduct heat to the heat sink.  Now they use
Gap Pad but without the conductor the tranistor will often cook itself


At 3:28 PM -0700 10/12/02, Neil Swanson wrote:
>Hey all
>
>Yesterday Paul Krumins drove his S6 in with a misfire.
>Yeah Paul can drive again. Yeah!
>
>First thought was loose plug but a little digging
>turned up a failing POS on the firewall.  I installed
>both from my S4 just to be dead sure and that is where
>this tip comes from.
>
>Behind each of the POS's you want to have some
>Silicone Dilectric grease for heat insulation.  Both
>of our cars had none.  If it was there when new it has
>long since dried up.  Mine are now greased/insulated
>and so will Pauls' be on Monday.  Just put on a bead
>and smear it around, reinstall POS.
>
>Many years ago in another life as a mechanic in the
>late '70s (not me in my late '70s, the decade) one of
>our Volvo customers had a Suburban that on the 3 hour
>drive up into VT would always misfire on the same long
>grade.  Never did it in town and no new tune-up parts
>ever cured it, except renewing the dried up Dilectric
>grease under its power stage.
>
>So while I've never seen the grease cure an Audi
>misfire it ought to be there.
>
>Neil
>
>
>
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Mark Turczyn