[W126 Coupe] MBCOUPES Digest, Vol 35, Issue 40 Coolant System Problems

[Willardtredway at aol.com]

I don't want to be the rainmaker here but do not rule out the possibility  of 
a two other options;
Blown head gasket or a ruptured heater hose. Your exact conditions  
replicated on my Landcruiser (ruptured heater hose) and my Lexus (blown head  gasket). 
 
In a message dated 8/30/2007 2:25:00 P.M. Central Daylight Time,  
mbcoupes-request at mbcoupes.com writes:

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Today's Topics:

1. Re: 420  SEC coolant system problems (Oisin Margey)
2. Re: 420 SEC  coolant system problems (Markus Meyer)
3. Re: 420 SEC coolant  system problems (Gary)
4. Re: 420 SEC coolant system problems  (Dick Spellman)
5. Re: Houston Gathering (Rob  Dent)


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Message:  1
Date: Thu, 30 Aug 2007 18:23:44 +0200
From: "Oisin Margey"  <omargey at cadence.com>
Subject: Re: [W126 Coupe] 420 SEC coolant  system problems
To: <mbcoupes at mbcoupes.com>
Message-ID:
<80726DBE398EBB4A8B77AD210C509EAA03A1E1F4 at MAILEU.global.cadence.com>
Content-Type:  text/plain; charset="us-ascii"

Hi Markus,

thanks for your help,  I also noticed a whining noise which wasn't there
before, another forum  suggested it may be a water pump bearing. I'm not
sure what units the temp  guage is in, can't remember if it says C or F,
either way it was reading at  the bottom end of the guage and was nowhere
near the red area, could also  have a faulty sensor then as its not
reading 80 which i think is normal,  will double check my guages and see
if its C or F,

thanks  very  much, all the best,

Oisin
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Message:  2
Date: Thu, 30 Aug 2007 09:32:00 -0700
From: Markus Meyer  <mfm at meyerprobateproperties.com>
Subject: Re: [W126 Coupe] 420 SEC  coolant system problems
To: Mercedes Coupes Mailing Lists  <mbcoupes at mbcoupes.com>
Message-ID:
<20070830093200.5abd5bb6c1e022cd50c47094d09c8c0f.56c525bf53.wbe at email.securese
rver.net>

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Message:  3
Date: Thu, 30 Aug 2007 10:37:43 -0700 (PDT)
From: Gary  <garysalas at yahoo.com>
Subject: Re: [W126 Coupe] 420 SEC coolant  system problems
To: Mercedes Coupes Mailing Lists  <mbcoupes at mbcoupes.com>
Message-ID:  <234061.48687.qm at web31907.mail.mud.yahoo.com>
Content-Type:  text/plain; charset="iso-8859-1"

this is out of left field...i had a  noise that was kind of winny and clanky 
it was the alternator. 

Markus  Meyer <mfm at meyerprobateproperties.com> wrote:  Your water pump  could 
be leaking and "throwing" the coolant under the car so that it drips  down 
further back possibly.  Best of luck!

Markus  Meyer
mfm at meyerprobateproperties.com
www.meyerprobateproperties.com
Meyer  Probate & Properties, LLC
484-919-9762


-------- Original Message --------
Subject: Re: [W126 Coupe] 420 SEC  coolant system problems
From: "Oisin Margey"  <omargey at cadence.com>
Date: Thu, August 30, 2007 12:23 pm
To:  <mbcoupes at mbcoupes.com>

Hi Markus,

thanks for your help, I also noticed a whining noise which wasn't  there 
before, another forum suggested it may be a water pump bearing. I'm not  sure what 
units the temp guage is in, can't remember if it says C or F, either  way it 
was reading at the bottom end of the guage and was nowhere near the red  area, 
could also have a faulty sensor then as its not reading 80 which i think  is 
normal, will double check my guages and see if its C or F,

thanks  very much, all the best,

Oisin

---------------------------------
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Postings remain property of MB Coupes,  L.L.C. 
The MB Coupes Website!
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Postings remain  property of MB Coupes, L.L.C.
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Message:  4
Date: Thu, 30 Aug 2007 15:07:17 -0400
From: Dick Spellman  <spell.yy at verizon.net>
Subject: Re: [W126 Coupe] 420 SEC coolant  system problems
To: Mercedes Coupes Mailing Lists  <mbcoupes at mbcoupes.com>
Message-ID:  <46D71565.8080308 at verizon.net>
Content-Type: text/plain;  charset=ISO-8859-1; format=flowed

Welcome Oisin.

That sure  sounds like your thermostat is firmly stuck in the closed 
position where  you are only reading a temp of 40-50 C.   Do not drive 
the car  to your mechanic until you do the following.  With engine cold,  
remove the bolts securing the upper radiator hose fitting to the water  
pump.  Now remove the thermostat, keeping the rubber seal.   Replace the 
rubber seal followed by the upper hose fitting and  bolts.  Replenish the 
coolant level and drive to your  mechanic.

Or purchase the correct thermostat and new seal for the car  and do this 
job your self in 15 minutes simply replacing the thermostat  and noting 
that the little weep hole in the thermostat rim (flange) should  be 
located at the highest point of the engine.  Your choice.   Either way 
when done have a pint of Harp on  me.

Regards,

Dick

Oisin Margey wrote:

>   

> Hi everyone,

>  

> i'm Oisin and just joined, nice  to meet you all. I'm Irish, living in 

> Dublin.

>  

>  i've just got myself a beautiful 1990 420SEC, 76k FMBSH and 

>  unfortunately am having problems already !

>  

> Yesterday  after being out for a run for about an hour i started 

> hearing a  slooshing / churning kind of a noise which

> seemed to be coming from  the area in front of the driver, i could only 

> hear it while stopped  at traffic lights,junctions etc.

>  

> At this point the  temperature guage was at around 40-50 degrees, the 

> oil pressure was  at the top of the guage at 3, so i think normal

> for both of  these.

>  

> When i got the car home i sat and listened to it  for a few minutes 

> with the driver's door open. Next thing steam  starts

> escaping from the corner of the bonnet by the driver's wing  mirror and 

> through the hinge area of the open door, then

> a  liquid started pouring onto the ground from, what appeared to be 

>  under the driver's door, the liquid was green and i

> believe it is the  anti-freeze.  Thinking about it now the churning 

> noise could  have been a boiling sound. 

>  

> I let it cool for an hour  or so and brought some water to fill the 

> head tank for the radiator.  ( i think this is the correct name ).

>  

> It filled up but  if i waited a few minutes i could always put a little 

> more in,  looking through the plastic tank it seemed to be about 3/4 full.

>   

> This morning the water level in this tank had dropped to about 1/4 or  

> less.

>  

> The car itself has only done about 5k in  the last 5 years but has just 

> had a service with new plugs, leads  etc. I'm hoping

> this is just some hosing or other consumable which may  have perished 

> over time due to the car not being used  regularly.

>  

> Any ideas ? Do you think it'll be safe for  me to drive as far as a 

> mechanic ?

>  

>  thanks

>  

> Oisin

>  

>  ------------------------------------------------------------------------

>

>  The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain  property of MB Coupes,  L.L.C.




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Message:  5
Date: Thu, 30 Aug 2007 12:24:22 -0700 (PDT)
From: Rob Dent  <dentrpt9 at yahoo.com>
Subject: Re: [W126 Coupe] Houston  Gathering
To: Mercedes Coupes Mailing Lists  <mbcoupes at mbcoupes.com>
Message-ID:  <92180.13262.qm at web38205.mail.mud.yahoo.com>
Content-Type:  text/plain; charset="iso-8859-1"

Hey Doug,

I  also tried to send 3 photos from the meet but it said it was too big as  
well.  Maybe 1 pic at a time might work...anyway, it's worth a  try!

Rob

Doug Gavin  <dlg64 at houston.rr.com> wrote: 
Hi All, I sent an e mail with  photos but it must have been too large of 
a file as it is being held by  the site administrator for review although 
there were only 3 photos. I  will try again if it does not go through.

Doug Gavin
The MB Coupes  Website!
W126 SEC Mailing List
Postings remain property of MB Coupes,  L.L.C.



---------------------------------
Yahoo! oneSearch: Finally,   mobile search that gives answers, not web links. 
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End of MBCOUPES Digest, Vol 35, Issue  40
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