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Before reassembling the two case halves, inspect the case seam for old sealer and scrape it out of the seam. We applied a small bead of butyl sealer to the seam, then pressed the two case halves together. To aid in installing the case clips, a gentle squeeze of the case halves with a pair of pliers will help.
1966 Mustang Project: Heater Case Rebuild

 Before reassembling the two case halves, inspect the case seam for old sealer and scrape it out of the seam. We applied a small bead of butyl sealer to the seam, then pressed the two case halves together. To aid in installing the case clips, a gentle squeeze of the case halves with a pair of pliers will help.  View Related Article

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