[W126 Coupe] "Whirring" noise in the engine

[Michael Ramay]

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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