[W126 Coupe] "Whirring" noise in the engine

[Michael Ramay]

Thought about that too and took mine apart (it was fine), then put in a new
set of viton o-rings. It "should" be good for ten more years.

Good ideas, but not the problem one yet!!
Mike

On Tue, Feb 1, 2011 at 9:13 AM, Jonathan Hodgman <jhodgman at gmail.com> wrote:


>  I've seen the SLS pumps make a noise that's hard to locate..

>

>

>

> On 2/1/2011 9:22 AM, Michael Ramay wrote:

>

> 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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