First thing I did was a thermostat, then a radiator, the old one leaked a
little anyway so it was worth doing. I can see the temp gradient across the
radiator from inlet to outlet.
Would a little air pocket stick around for months of driving? It sure acts like
an air pocket...
Interestingly on the way home with the AC on it behaved better. I'm thinking
the fan clutch doesn't engage which was my problem last night. I know the fan
clutch works (201s have an electro-magnetic fan clutch) because I can actuate
it by grounding its sensor. I'm thinking I might wire up a light to tell me
when the clutch is engaged. Which should tell me if the sensor works.
I still think the temp sensor for the gauge is bad, at best it reads 10C high.
Maybe I should catch up with Fred and get his spare. Or maybe I should just
pony up the $20 to buy a new one from Rusty.
-Curt
Date: Fri, 17 Aug 2012 11:35:40 -0500
From: Peter Hertzing <phertz...@gmail.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Subject: Re: [MBZ] 190D continuing saga
Message-ID:
<CAB4qbQHCLBBqoydPyPwKDCMXtrb6AobZ7pLFtxAZ2=hhgss...@mail.gmail.com>
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Sorry Curt - coming into this late so I don't mean to be redundent. From
the sound of the description below - you have already done some work. My
first stop is always at the work I have done, making sure you have a fully
bled system with no air pockets. You already have the IR thermometer, so
the next think I would do would be to check the temp across the radiator,
looking for a cool spot. While unlikely, you could hae a colapsing
radiator hose restricting flow.
Gould luck, I hate these gremlins. I currently have a randomly overheating
limo where the cooling fan doesn't turn on and it over heats - but by the
time you look at it the fan has come on and won't go off and works
perfectly. Definitly annoying.
Peter
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