AC evaporators in the W124 were a known problem, official estimates
are 15% failed in 10 years. My personal score is more like 2 out of
three. The originals had copper piping and an aluminum core, with
the result that the aluminum suffered from severe stress corrosion
(fatigue) at the rolled seal. Not a bright idea.
If replacing, use the all aluminum one, they don't leak. More to the
point, the junction between the supply and exit lines and the core
don't crack, which is were the originals fail.
Replacing one is a huge job, 16 hrs by the factory manual and usually
three days for the amateur. I know, I did one. Better the second
time, I'm sure, but it's a huge pain.
Peter
On May 26, 2012, at 3:29 PM, Scott Ritchey wrote:
" Not necessarily"
Agree. I don't know about 124s but I never had a 123 or 126
evaporator leak
(o-rings: yes, compressor: yes, hoses: yes, evaporator: never). On
the
other hand, I has an 86 Mercury Sable (aka Ford Taurus) and the
evaporator
went bad (leaked) every 7 years, like the plague. These were all R-12
systems.
Also, if it's anything like a 126, replacing the evaporator is a
horrible
job.
Also, a good local hose (hydraulic?) shop may be able to rebuild
leaking
hose assemblies (new rubber on old metal) much cheaper than buying the
factory part (which may have old rubber).
Also, I've had compressors that only leak when they sat overnight
and then
tighten up as soon as they start turning.
Finally, in my old age this (AC work) is a job I give to the
professionals
... if you can find a good (i.e. capable and honest) one. My last
good one
was an indie who worked alone and his "shop" was dark, dirty, and
littered
with dead AC parts.
-----Original Message-----
From: mercedes-boun...@okiebenz.com [mailto:mercedes-
boun...@okiebenz.com]
On Behalf Of Alex Chamberlain
Sent: Friday, May 25, 2012 5:48 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] Which AC leak sealer to use?
On May 25, 2012 2:38 PM, "Rick Knoble" <rickkno...@hotmail.com> wrote:
On May 25, 2012, at 4:15 PM, "Brian Toscano"
<brian.tosc...@gmail.com>
wrote:
The best leak sealer to to replace failed o-rings and parts with
holes
in
them.
Which means evaporator and compressor. Ugh.
Not necessarily. Best to make a positive determination of the
source of
the leak first with a sniffer or dye, unless you are planning to
replace
the entire system all at once on principle in hopes of never having
to mess
with it again. I've had two 124s develop A/C leaks in parts MUCH
easier to
change out than the evaporator--the double hose assembly that
attaches back
to the compressor (twice) and the condenser (once).
Alex
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_______________________________________
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To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
_______________________________________
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
