Loren,
Thanks, I will check the key on the timing advance shaft. I suspect it's
gone.
Thanks
Bruce
82 300CD 348kmi 'His'
85 300CD 253kmi 'Hers'
75 240D 202kmi 'Donner'
77 240D 204kmi 'Blitzen' gone to a better place
74 240D 79kmi 'Orangewagen'
73 220D 'Fnu Lnu'
---------------------------------
Ahhh...imagining that irresistible "new car" smell?
Check outnew cars at Yahoo! Autos.
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Subject: Re: [MBZ] H2O Pump Degradation
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Some after market impellers are stamped steel - I have one on my
garage floor - replaced by an OEM type from Rusty. A weak fan clutch
can do tha same thing - forward motion of the car produces air flow -
none at a stop.
On 4/18/07, Jim Cathey <[EMAIL PROTECTED]> wrote:
> > Is it possible for an H2O pump's pumping capacity to degrade (maybe
> > by a worn impeller) such that the car runs hot at idle but runs normal
> > operating temp when rpm is increased?
>
> Generally, yes. But specifically the impellers on OEM mercedes
> pumps are so thick that it's highly unlikely. A leaky bypass
> seat (housing or thermostat at fault) could induce something
> like that too, by recirculating too much coolant when at low
> flow rates.
>
> -- Jim
--
OK Don, KD5NRO
Norman, OK
"Even if you're on the right track, you'll get run over if you just
sit there."
Will Rogers
'90 300D, '87 300SDL, '81 240D, '78 450SLC, '97 Ply Grand Voyager
