Expansion Tank Cap
$10.66
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The coolant expansion tank cap maintains an elevated cooling system pressure to raise the boiling point of the liquid coolant, while venting excessive pressure to atmosphere. These caps have a limited service life; they should be pressure-tested as part of a routine maintenance schedule, and replaced as part of any major cooling system overhaul.
This bright blue cap includes a replacement o-ring, and dresses up the appearance of any engine bay.
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