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Thread: Disintegrating interior heater tube foam!

  1. #1
    Junior Member
    Join Date
    Oct 2022
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    1

    Disintegrating interior heater tube foam!

    Hi, I am new to the forum (stalker for ages) and really appreciate both the knowledge and sly humor of the place thanks for many a great read and insight-

    I have a Ď66 912 resto Iím into the metal work on. Just replaced floor and am onto the rockers- noticing that the interior heater tubes which are metal on this example look to be in solid shape with just some surface rust which comes off with a scour pad.
    The issue is that on reaching hand inside the tube I felt that there is a foam tube INSIDE the tube- and on one side itís sort of deteriorating.
    We blew some air through it and nothing comes out- however, my concern is that once the engine starts kicking out that good heat in the winter that a funky smell might arise (this car spent a lot of time dank/damping away in a Long Island barn. Like 50 years.
    My metal guy is eager to seal it up and move on as he believes itís a non-issue. Wondering if anyone has any familiarity with this.
    These are not the cardboard variety tubes and I also just wanted to share a pic as I donít know if the metal type is unusual and might be useful to see for someone else-
    Itís an interesting design. I think like a muffler. Outer metal canister, presumably some layer of baffling or insulation, then inter metal liner, THEN the foam tube I mentioned! Must really be concerned about noise transferring from motor.
    Thought I had a pic of the foam tube but I donít- basically if you peer into the hole at your ankle where the heat comes out you can see the end of it in there - or just feel around with fingers.

    Thatís all I got- thanks again for all the great reads 🙏
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  2. #2
    Interesting post !
    When I put the heating lever up heat is coming but I ear some noise coming from the engine so I don't know what they put inside during the restoration of my car ???

  3. #3
    Senior Member VintageExcellen's Avatar
    Join Date
    Feb 2007
    Location
    San Diego
    Posts
    1,932
    Yes sound transfers through the heat tube without some sort of dampening. I had a car one missing all of the baffling in that tube and you could hear engine noise coming right out of that tube in a way it is not supposed to be. Also mice like to make nests in that tube so I have got a car back on the road after a long slumber, pull the heater and the cabin smells like mouse urine.

    You can cut out the muffler tubes and replace them with new tubes. I have a set of new if you need them - I sold off a rusty project but still have those tubes in new condition, pm me if you do.

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