@mxfrank...thank you! What you wrote is exactly what I have pieced together from research over the past few weeks...
But I still don't understand if removing the thermostat will provide a solid recirculation of coolant between the expansion tank, radiator, and block.
I have read, and you hint, that running the engine, to perform a flush, with the thermostat removed, can lead to overheating...another poster said the same...
Quote:
Originally Posted by jay_bob
I recall reading a while back on here that the thermostat being in the path affects the fluid dynamics in the system. Something about running with an empty thermostat chamber is bad for the flow and it can cause hot coolant to bypass the radiator and cause a rapid overheat condition.
The "forcibly opened thermostat" is a special MB tool with a part number. You're supposed to open the thermostat chamber and install this special thermostat for flushing.
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With the "forcibly opened thermostat" costing $200 (the proper procedure for a 603 coolant flush), I wonder what other people have done to flush the coolant on a 603 without buying the specialty part??? F