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Nlbloch · 05-15-2018, 06:54 PM

I have a thermostat-style radiator cap that became badly corroded. I have soaked it in CLR and most of the corrosion dissolved, but I still have some crust that just won't disappear.

Worse yet, the hinged top won't open -- I can only access the radiator by taking the entire cap off.

Any suggestions on how to remove the remaining crud, and how to separate the top/bottom parts of the cap?

05-15-2018, 06:54 PM	#1
Nlbloch Member Join Date: Apr 2011 Posts: 70	stuck radiator cap I have a thermostat-style radiator cap that became badly corroded. I have soaked it in CLR and most of the corrosion dissolved, but I still have some crust that just won't disappear. Worse yet, the hinged top won't open -- I can only access the radiator by taking the entire cap off. Any suggestions on how to remove the remaining crud, and how to separate the top/bottom parts of the cap? Last edited by Nlbloch; 05-15-2018 at 07:04 PM. Reason: Add photos