John Hubbard took these photos after sandblasting the manifold of his Willys original equipment defroster.
The first photo shows the side facing the driver.
The second photo shows the side of the defroster facing the windshield, and the mounting brackets.
A reproduction of this manifold is available from Herm The Overdrive Guy.
This original defroster in a 1963 CJ-3B has a second indentation for a hose opening on the right-hand end. This photo by Adam Charnok also shows the fresh air heater.
Bill Oakes took a closer photo which shows the crinkle paint finish, and the second indentation.
If you don't have the other parts of the original defroster, it shouldn't be too hard to build a heater outlet, similar to this possibly original one on Bill Glasford's '57 Harrison heater. See also a photo of the entire heater (50K JPEG).
If you have a 2-1/2" hole in the dashboard above your steering column, that's where the original hose was routed through the dash.
Joel Kamunen built this defroster manifold out of 1-1/4" PVC tubing. He says, "It clears the windshield off quite nicely. I spaced the holes about 2" apart and may try different hole sizes to see what works best, but it's a great improvement from the stock set up."
Thanks to Joel for the photo. See why his 1954 CJ-3B has to have a defroster, on the Enhancing F-head Performance at High Altitude page.
See also another approach to making a defroster nozzle, at the All-Breeds Jeeps Show.
Thanks to all the contributors. -- Derek Redmond
See also Harrison Heater Tech Tips.
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