With colder weather finally arriving in Houston, I need to replace my heater core. I’ve been living without it for the last few years, but would like to drive the car this winter on dry cold days.

I have a Motorcraft core and a new restrictor somewhere. I need to dig up some of the instructions that I’ve seen here on FEP. I seem to recall some good comments from homer302, the guy who can replace heater cores before breakfast.

I seem to recall some comments about using butyl tape to seal up the HVAC box. Any recommendations? What size tape? I’m finding 1” wide tape, which is too wide. Does it come in 1/4” rope?

Any other suggestions for materials that I should buy in preparation?



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