Quote:
Originally Posted by tangofox007
It's tough to make that argument when the OM617 thermostat only begins to actuate at 80ºC and does not fully actuate until 94ºC.
Have you been putting milk in your cooling system?
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This is based on the five w116 I have owned four 300SD and one 450SEL. When they have ran hotter than 80, they need their radiators completely cleaned out, and re sealed. They have also all had green coolant prior.
Calcium < lime scale/rust wrong term.