I am considering changing to the waterless, no pressure Evans coolant. My 124 has a history of cooling system problems: replaced radiator, heater core, pump, etc. The head on the 124 is also sensitive to overheating. Mine has been replaced with a #17. My question is if the boiling point of the evans coolant is 375* F, can't my heat sensitive head be overheated and I wouldn't know? What would stop the temp from rising to, say, 290* if my pump fails? If I'm not watching the guage I wouldn't know. What am I missing here? In my search on this topic, I found where one poster said to purge the system of water by draining, filling with Evans then blocking the radiator so the temp would get high enough to boil off the residual water. Isn't this too hot for my engine?

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K