[W126 Coupe] "Whirring" noise in the engine

[Michael Ramay]

Great idea but I still have the noise with all the v-belts off the car
(nothing on the front of the motor rotating) and the smog pump wiring is
unplugged.

On Tue, Feb 1, 2011 at 6:25 AM, Olsson_Chris <Olsson at lumber.com> wrote:


> I would bet money that it is your smog pump, sounds exactly like what I had

> going on.

>

>

>

> *From:* Michael Ramay [mailto:mike.ramay at gmail.com]

> *Sent:* Tuesday, February 01, 2011 6:23 AM

> *To:* Markus Meyer

> *Cc:* Mercedes Coupes Mailing Lists

> *Subject:* Re: [W126 Coupe] "Whirring" noise in the engine

>

>

>

> It's not turning and it's unplugged.

>

> On Tue, Feb 1, 2011 at 6:15 AM, Markus Meyer <markusfmeyer at gmail.com>

> wrote:

>

> Is your air  pump unplugged?  That's what mine sounded like till I

> unplugged it.

>

>

>

> Markus

>

> On Tue, Feb 1, 2011 at 9:00 AM, Michael Ramay <mike.ramay at gmail.com>

> wrote:

>

> My '87 560SEL makes a "whirring" noise when it's first started. Sounds

> almost like a bad bearing in the alternator and loud enough that my wife is

> commenting on it but in a mile or so it goes away.

>

> - I removed all the V-belts on the front of the motor, still have the

> noise.

> - Since it sounds like it's coming from the passenger side of the engine up

> high, I removed that valve cover then ran the engine - it was louder.

> - Put in a new timing chain and new guides. !@#$%^&* - still have the noise

> but the car has noticeably more power.

>

> It REALLY needed the guides since one was broken in two and a 3" long piece

> is missing plus another had the hole for the retention pin wallowed out.  I

> looked very carefully down the chain pathway during the installations but no

> sign of the piece.

>

> Will removal of the oil pan allow me to see much of the lower timing chain

> guide area? If the missing chain guide is jammed in there and rubbing on the

> rotating bits, why would the noise diminish in a minute or so of operation?

>

> Suggestions??

>

> Thanks,

> Mike

>

>

>

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>

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