What is this pump how is it driven electric ?? I don't think I have one
I have a UK 1989 190E 2.0lt and it has the same symptoms The Heater
Matrix is 95% certainly clear I Flushed it with a running hose after
running a Radiator Flush chemicals first for 3 days water came out clear
at the same rate out as going in BOTH ways, Fitted new Thermostat Car
warms up quickly to 80deg when running at street legal speeds. goes
above to 95deg if sat in traffic for 10 - 15minutes
On UK drivers side there is a Monovalve that I am going to change Not
leaking but this is fully open all the time Could it be Water pump again
no problems driving car, no water leaks
190E usually has electric aux water pump as the engine water pump is too
small to send some coolant to the heater core. Follow your heater hose all
the way to the water pump... surely you must have some sort of extra pump in
Huh, I thought this was just a pre-heat kind of thing? I know i have
seen a couple of cars at least with this electric pump removed/bypassed?
Could also be a problem with the temperature selector on the dash...
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