[Shop-talk] winter time: reformat info

[Paul Mele]

In tabular form for your scrapbook...

Coolant Corrosion additive check			
			
			
Coolant NEG		Radiator Tank POS	
			
Voltage		Meaning	
			
<0.2 V		OK	
0.21-0.49		Borderline	
0.5-0.69		Bad	
>=0.7			Replace Immediately
	
Easy way to check for radiator corrosion protection, just as
important as
checking the antifreeze, if the coolant is allowed to become
"acidic" the
engine and radiator will also become corroded with rust.
Using a volt-ohm
meter (VOM) set it to a DC voltage range that measure in
"tenths" of a volt,
remove the cap and place the negative VOM lead into coolant,
being very
careful not to touch any other part of the radiator. Place
the Positive lead
of the VOM against a bare metal part of the radiator (or a
good ground of the
engine), a reading of 0.2 volts or less, coolant is in good
shape, a reading
of 0.5 volts it is borderline, 0.7 volts replace your
coolant immediatly.
This comes from my "Model A" workshop manual and also says
it works in modern
cars as well, which is really more important because of
aluminum heads or
dissimilar metals in modern cars.