I'd use the cathey trick to open the thermostat and see how it runs.
Until that is done, it is not much use talking about it.
Dimitri, congrats on the good compression engine. Test it with the
.45 shellint the thermostat, and report back. I am still betting on
a thermostat. (ducking...Yes, I know it is new and has been
replaced.) A lot of thermostats are bad out of the box.
The car is a very early 123 with what I presume is a very early
style thermostat housing. We should get Dimitri to get a picture of
the thermostat housing, its weird looking...
Remember it didn't always do this and when its "overheating" its
bubbling the coolant back out the radiator so its not just a temp
gauge variation. My '84 190D temp gauge creeps up sometimes but
always drops back down, that one is a gauge gone mad. I've replaced
the thermostat, the radiator, and the temp sender but still the
issue persists. Now I just ignore it although a dose of water-wetter
has helped stabilize it some.
-Curt
From: fmiser via Mercedes <mercedes@okiebenz.com>
To: mercedes@okiebenz.com
Sent: Tuesday, January 6, 2015 6:58 PM
Subject: Re: [MBZ] Compression good
dseretakis--- wrote:
I got Curt and Dwight's former 240D to start this am in 14 degree
temp. I put it through two 30 sec glow cycles and one 20 sec
crank and it fired up. Compression couldn't be that bad!
It still does it's weird temp fluctuation thing so I can only
drive it around town for now.
What style thermostat housing does this use? 'Cause I have had
troubles with the newer style not always sensing the temperature
correctly. The "fix" is a 5 mm or so hole drilled in the
thermostat to allow some flow even when cold "off".
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