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What to Do When Replacing an Aluminum Radiator

Last Updated: Aug 20, 2014 07:43PM EDT
  1. Replace your radiator cap
  2. Flush system and use a 50/50 pre-diluted coolant
  3. Never use tap water

If you notice reddish orange residual coolant stains on your old or new radiator, this indicates the coolant may not have been changed during installation or water was applied to the system.  Tap water is by far the most corrosive element that can be applied to a new aluminum radiator.  Situations such as the above will void a manufacturing warranty.  By replacing your cap, you will extend the general life of your radiator and prevent potential pressure buildup from a faulty cap seal.  Believe it or not, a faulty or old cap can cause a radiator failure

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