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Surface Rust in Coolant Passages.
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08-30-2021, 11:03 AM
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alexiskai
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Join Date: Apr 2018
Location: Mebane NC
Posts: 2,360
Re: Surface Rust in Coolant Passages.
Address it after the system is sealed, using a de-rusting product like Thermocure or Rust911. Users of this forum have reported success with both; just follow the directions.
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