[W126 Coupe] "Whirring" noise in the engine

[Markus Meyer]

If its unplugged it isn't turning as Mike said.  I'd take the alternator
belt off and see if noise goes away.

Thanks,
Markus

On Feb 1, 2011 9:29 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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