[W126 Coupe] "Whirring" noise in the engine

[Michael Ramay]

I did the long screwdriver to the ear trick and it, unfortunately, ain't the
pump. Darn. Good idea though.

What about something in the front of the tranny??

On Tue, Feb 1, 2011 at 1:46 PM, Jonathan Hodgman <jhodgman at gmail.com> wrote:


>  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>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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