Heater Blower Unit

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I am missing the heater blower unit in our 78 Westy. Found one at a junk yard but cannot see how to take it off. Seems there is a bracket holding it to the roof of the engine compartment. I cannot get that off without taking the blower off the bracket. Anybody know what size wrench the housing is attached to the bracket with?

Thanks.

[Tyler 5447]

Usually there is a hose clamp that holds the blower to the bracket on 74ish busses, I don't remember if it is the same on the later blowers. I believe the bracket bolts are 13mm.

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10mm on both, just did one a couple months back.

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Thanks a bunch both of you.

I saw the hose clamp and thought it was a Jarry-Rig. Looking at the dash on this bus I think it is a '74. Hopefully a wrench and it will come right off.

I need some heat in Alaska!