Does Anybody have Heating Ductwork Diagram for 1957?

[Brandon Todd]

Hello,

 

I was wondering if anybody has a list/picture of the different sizes and lengths of interior heater ductwork for 1957. I seen pictures of how its supposed to be ran, but it doesn't list any specs. 

 

The car has no AC. 

 

Thanks  

[56 Buick]

My understanding is that there is no magic list but you could try a Parts Book. Failing that are you able to measure the diameters of the metal tubes where the ducts slide over? Diameters will go up in 1/4" increments if that assists in working out a size - remembering the duct goes over the metal tube so the outside diameter of the tube will be the internal diameter of the duct (which is the measurement you want). Re lengths I can only suggest using a tape measure to get an approximate length and then adding some to be sure. May be a bit hit and miss unfortunately.

[NTX5467]

Back then and well up into later decades, GM sold the ducting as "roll goods" rather than already cut to length items.  There were probably about two or three different sizes to cover all of the models.  Under the orientation that should a replacement be needed, some sort of pattern would exist from the particular vehicle which could be used to determine the length of the tubing.  Some vendors might have lengths already "cut to fit", but GM never did supply it that way.

 

As all of the parts book illustrations were "to scale", some approximation of the tubing length might be made using the sizing of the heater box to relate to the tubing length?

 

Just some thoughts,

NTX5467