63-67 Expansion Tank (Replacement)
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New replacement 1963-1967 Corvette expansion tank. Expansion tanks, often referred to as recovery tanks allowed for expansion or recovery of coolant as the engine temperature rises. Expansion tanks equipped Corvettes used radiators without radiator caps. A tube and rubber hose connected the expansion tank to the radiator.

Replacement tanks are undated. Original 1961-1964 Corvettes expansion tanks came with pressed-in tubes. The tubes became an issue as wrestling with heater hose connections would often break loose the connection and cause the tank to leak. GM fixed this problem with their later design and service tanks. Zip's replacement expansion tanks feature welded tubes to eliminate leakage problems and provide a worry-free installation. Made in USA.

This item is proudly Made in the USA

Installation difficulty: 2

Our technicians have determined that the installation difficulty level of this item is a 2 on a scale of 1-5. Read more about our install ratings here.

Technical Articles:

Model Years

More Information
Generation C2
Model Year 1963, 1964, 1965, 1966, 1967
Additional Item Information
  • OE GM PART #: 3155416
    *GM part # provided for lookup purposes only.
  • WARNING: Cancer and Reproductive Harm - www.p65warnings.co.gov


Based in Michigan, DeWitts Radiator is the only aftermarket radiator manufacturer in the US which owns an aluminum Nocolok blazing furnace. With a twelve-person crew, DeWitts builds custom and direct fit radiators for 1955-present Corvettes from start to finish at their Howell, MI plant. No epoxy is used in the making of their radiators, and their construction methods eliminate seams and possible leak points. Their Lifetime Warranty is industry leading, and Zip only recommends DeWitts Radiators to our customers.

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