[Healeys] Coolant change

[Bob Spidell]

There are testers for this; I suspect they are a type of litmus pager we all remember from high school chemistry class (NFI, no experience with them): 

http://tinyurl.com/qz2p5zr 

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..as a final thought.. though there are now "permanent" coolants 
available for new vehicles, our old cast iron engines still require 
glycol based coolant. As a rule of thumb for exchange/life duration... 
stick your finger in the coolant, if it still feels slippery then it's 
likely still OK for a while longer.. best guess/test from me.. 


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