[W126 Coupe] Running Hot update

[Dick Spellman]

Hi Pavel:

The only caveat in installing the thermostat is to be sure the small 
weep hole in the thermostat outer flange is at the highest point on the 
engine.  This allows any trapped air to escape out the upper radiator 
hose or if you have the tap on plug with crush washer on top of the 
tstat housing you can bleed air from there as well under cool conditions.

I doubt that the orientation of the weep hole is the cause of your 
problem.  You did say that the visco fan clutch had been renewed and was 
working properly, right?  The visco is supposed to be engaged fully to 
provide better cooling at low rpms and only break away after reaching 
some prescribed rpm value.  Did this proble just pop-up or did it start 
after some engine work had been performed?

Regards,

Dick

Pavel wrote:

> 
>Here is the update on the sec crew.  Put a brand new behr radiator in
>pulled drain plugs from block drained all the coolant filled it up with MB
>50/50 antifreeze mix.  Started it up got all the air out of the system, the
>stupid thing still sits at 90 unless I rev it up to 2000 rmp then goes back
>to 82 deg instantly, then creeps up to 90.  Stays between 88 90 while
>driving around unless you hammer on it than goes down to 85.  It bugs me
>very much and it is not enjoyable for me to drive my sec anymore.  Is this
>getting caused by my new wahler thermostat?  Why did they do that?  Where
>do I get the original thermostat so my temp gauge does not drive me nuts.
>thanks
>Pavel
>
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