With the radio and dash wiring all squared away, the front heater box could be installed. My brass heater pipes going coming through the firewall to the heater box were a mess. Very corroded and black insulation was falling off when touched. Even though my 40 had a rear heater, I salvaged the heater pipes off of my other 40 that most likely didn’t come with a rear heater as it was original to Hawaii. Those brass heater pipes do not have the extra down pipes that go to the rear. Since I will never use the rear heater here in Hawaii, these unique pipes were perfect.
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I used the same salt and vinegar dip to clean the brass pipes and they came out spectacular. I ordered some inexpensive 13mm ID foam rubber insulation for the heater pipes. Below is the stuff I ordered if anyone needs the details. It’s 6 feet, so may be long enough to do rear heater pipes as well.
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Had to break out the good stuff to get through this next part.
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Settle down Moderators, it’s just a little J&J baby powder

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When applied to the outside of the brass pipe and inside the foam insulation, the insulation slides right on the brass pipes so easily. A little compressed air shot through after clears out most of the baby powder.
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