Re: Steam Cleaned Engine PROBLEM on 97 E420

When I brought my E420 Sport to Ziebart for engine steam cleaning they
told me they wouldn't do Mercedes. I figured they had a good reason.

On Wed, 27 Apr 2005 06:13:52 GMT, "boltons@xxxxxxxxxxxx"
<boltons@xxxxxxxxxxxx> wrote:

>Hey Guys,
>
>I'm in conversation with a detailing outfit that used high pressure hot
>water to clean my 1997 E420 engine.
>Well, a rough idle developed the same day I picked up the car. I had a
>scheduled servicing done a week later (I basically parked the car during
>most of that time; especially after the CHECK ENGINE light came on a
>couple of days later) and the mechanic had to change the COP (coil on
>plug) for #8 cylinder. He said it was all wet when he went to change
>the spark plug. #4 cylinder COP wasn't that wet and he dried it off and
>reinstalled the COP.
>Fortunately for me, the #4 COP failed during the test run and it had to
>be changed, too. Now, the car runs great!!! Including the price of 2 COPs.
>
>The detail guy claims I should have brought the car back to them right
>away to allow him to try to correct the problem - basically, blow it out
>with air and/or spray it with WD-40. He claims to never had any
>problems with cleaning engines and said any problems were usually solved
>by blowing out and spraying with WD-40 (a contradiction in the same
>sentence).
>
>MY QUESTION:
>Are COPs fixable by blowing out and flushing with WD-40? Or, do these
>units short out and become inoperable? Can a COP be bench tested?
>I have one of the COPs as exhibit #1.
>
>Any similar experiences or horror stories anyone have that I may learn from?
>
>Thanks in advance.
>
>Hez of the Pacific NW

.

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