[W126 Coupe] "Whirring" noise in the engine

[Jonathan Hodgman]

they don't have to leak to make noise;-)

On jack's SEC his pump made noise when it was cold.


On 2/1/2011 4:35 PM, Michael Ramay wrote:

> 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 

> <mailto: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 <mailto: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 <mailto: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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