[W126 Coupe] "Whirring" noise in the engine

[mavris2]

Not in anyway would i promote this.... But if worse came to worse and it turns out trans pump. I would try some lucas tranny additive. A few years ago my tranny would lung into reverse. Long story short 2 different shops said needs tranny. I put the lucas in and the reverse problem completly went away.  Maybe it will help the seals in the pump if thats where its coming from?

Jason

-----Original Message-----
From: Jonathan Hodgman <jhodgman at gmail.com>
Sent: Tuesday, February 01, 2011 4:58 PM
To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
Subject: Re: [W126 Coupe] "Whirring" noise in the engine

if it's from the trans only thing that would whir would be the front pump...NG :(


On 2/1/2011 4:47 PM, Michael Ramay wrote: 
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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