[W126 Coupe] 560 SEC idle

[Dick Spellman]

Jay,

Your question...<Rotor was slightly burnt on one side, discolored, darker
than rest of the copper edge which is “normal,” But what is normal?>

Just as an FYI..the rotor can be sanded to bright metal and reused for
another 40k.  Just keep the edge square.  There should be minimal metal
removed.  The interior contact points on the cap should be filed smooth (no
pitting)  all debris should be wiped clean when you are done.  I have 80k on
my 300se rotor which I have dressed up twice.  Last cleaned 30k ago when I
did the top end of the motor.

-\Dick

On Fri, Sep 3, 2010 at 11:17 AM, Jay Hirsch <J.Hirsch at mac.com> wrote:


>

>>

> Mercedes 560 SEC   rough, hiccup idle

>

> Started with basics.

>

> Checked spark plugs all good

> Took off dist. cap and rotor

>

> Rotor was slightly burnt on one side, discolored, darker than rest of the

> copper edge which is “normal,” But what is normal?

> Showed it to a friend who is a good auto mechanic.

>     He said it looks  “a little more burnt than usual.” Told me to sand

> down that edge  to get the corrosion off

>   Put back dist. cap and cleaned up rotor, car runs great, at idle and

> highway

> Got new Bosch cap and rotor and will install later today.

>

> Cap and rotor that are currently in car have at least 40,000 miles on them.

>  Will keep for emergency, in trunk

>  keep cruisin

> Jay H

> Thank all for input

> Hope this is of help to others

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.pairlist.net/pipermail/mbcoupes/attachments/20100903/1ad16a69/attachment.htm>