Seals between inner & outer heater boxes for C2s without A/C

[Gary B.]

Thanks,


Gary

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[Edward J.]

Re: Seals between inner & outer heater boxes for C2s without A/C

Gary, I think #5 is the same seal for the inner and outer boxes.

[Gary B.]

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[Gary B.]

[Harry S.]

Re: Seals between inner & outer heater boxes for C2s without A/C

Could this be it?

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[Gary B.]

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[Harry S.]

Re: Seals between inner & outer heater boxes for C2s without A/C

This is the flapper that diverts air to the defroster or the lower vents, yes, it's a 63 box I restored.

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[Gary B.]

[Harry S.]

Re: Seals between inner & outer heater boxes for C2s without A/C

In Dr. Rebuilds picture it's seal F. It slit and wraps the end of the metal flapper. It's held on with staples. If the slit rips, looks like you will get what fell off of yours.

[Bob R.]

Re: Seals between inner & outer heater boxes for C2s without A/C

Gary
The two seals you referred to in your first post should be glued to the outer box and the metal core support not the fire wall. The major reason to install all the foam seals is to eliminate hot air entering the cabin while driving. If you are missing a seal you will likely get a flow of hot air while driving. Doc Rebuild sells a heater box kit that includes replacement foam and replacement rivets. You will have to drill out the old rivets and replace. It can be a little difficult to replace the rivets but I was able to do it. If you have everything taken apart you should rebuild the entire box. It will make driving more comfortable and you don’t want to take it apart later if it’s already apart.

[Harry S.]

Re: Seals between inner & outer heater boxes for C2s without A/C

This is from a late 63 box which is the same as 66.

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[Gary B.]

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[Harry S.]

Re: Seals between inner & outer heater boxes for C2s without A/C

I've done 5 boxes, the only way to know is to take it completely apart and rebuild it.

[Gary B.]

Re: Seals between inner & outer heater boxes for C2s without A/C

Bob,

I agree with you 100% about the main seals in the kit, i.e., two of seal B and seal C in the Doc Rebuild sketch. As well as seal E, which is on the front side of the main heat box door is also critical. That front side seal prevents hot air from leaking past the closed heater box large door into the passenger cabin. But the backside twin seal D, only prevents back flow toward the blower motor, and I believe it only performs a sealing function when the main door is open to provide air or heat to the cabin. So, not that big of a deal if 5% of the air flow recirculates back toward the blower side of the heater core.

Gary

[Gary B.]

Re: Seals between inner & outer heater boxes for C2s without A/C

I've done 5 boxes, the only way to know is to take it completely apart and rebuild it.

I totally agree.

Gary