Topic: Coolant Type question


49acoustic    -- 06-14-2010 @ 9:49 AM
  Is there a particular coolant type that should be used on a standard flathead other than the typical Prestone type of coolant?


TomO    -- 06-14-2010 @ 10:22 AM
  I run with water and a rust inhibitor. In the winter I put in Sierra antifreeze. I prefer Sierra, because it foams less than Prestone and it is less likely to cause serious engine damage if a head gasket leak occurs.

Tom


flathead4rd    -- 06-14-2010 @ 6:04 PM
  TomO has the right info. I use Sierra also. The only thing I would add is to use distilled water with your antifreeze. This avoids lime and calcium buildup if the water in your area is hard.


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