[W126 Coupe] Squealing N3 module

[Dick Spellman]

Hi Rick;

It is almost a certainty that it's the aspirator blower.  They tend to 
get grumpy with the cold temps.  I've tried using a light weight oil on 
the bearings which certainly works in most temps but, come 10-20 F or 
lower and the little blowers still act up with a bit of noise until they 
build there own heat I guess.

Dick

Richard Hesek wrote:

>  Hi,

>  It may be due to the cold weather (small single digits) that went thru

> here last week but my ECU (N3 CISe engine control unit) started squealing

> upon start up. It would quiet down after the passenger compartment warmed

> up and since Friday the temps have risen to the 40 degree mark.

>   I am reasonably sure it is the N3 module but there is also an "aspirator

> blower" in the same location (passenger footwell side kickpanel) which

> could be the culprit. The squealing sounds like motor bearings.

>   There was no change in my near perfect running engine also.

>

> Any ideas or experiances here?

>

> Rick Hesek

> 87 560 SEC

> Northboro, MA

>

>

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