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63-64E Expansion Tank (Dated 63H)
Item #:
In Stock - Ships Monday

Exact reproduction 1963-1964 Early Corvette Harrison expansion tanks are correctly dated for your Corvette restoration. Includes original style pressed-in tubes. Produced from original tooling and licensed by GM. Dated 63H.

Features GM # 3155416, filing instructions and tank production date. Corvette expansion tanks are date coded based on a production of 1-3 months prior to the assembly date of your Corvette. Made in USA.

Note: Original 1961-1964 Early 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 1964 Corvette late design and all service tanks. All tanks are pressure tested prior to shipping - it's the responsibility of the customer for correct hose installation to ensure the pressed-in tubes do not become damaged. To eliminate leakage problems and provide a worry-free installation, Zip's replacement tanks feature welded tubes.

This item is proudly Made in the USA

Model Years

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


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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