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The heater blower assemblies in an Imp were never really designed with damp in mind, no coating, bad choice of materials and the failure of the time, still uses brushes which rely on springs to work properly.
So the tear down, first things first
The standard motor, as can be seen it can be in very poor shape, as Imps have no fuses anything jamming this motor (including itself) can cause overload or short. No good.
Here is one removed from the car in normal condition and then with the motor removed.
Typical of removed part, the grate is very dirty, the cavity housing the motor well sticky and dirty.
Now the motor is held in with several screws on rubber bushes, be sure not to famage these busghes on removal and remeber to remove the ground wire to the shell or if it has been riveted in grind off the rivet, the motor will then pull free.
Now time to strip down the motor, the motor enclosure is steel and will be well rusted, maybe not but every one I seen has rust, including on the edges of the metallic laminated cores.
The outer casing shown above has already been media blasted clean, it wsa indeed covered in rust, very crusty indeed, no noles though, remeber all the moisture sits inside here and collects at the bottom, I have seen one or two of these perforated all way through on bottom.
motor stripped apart , contacts cleaned, polished and any rust brushed off and givern a fresh coat of high temp lacquer.
Ready to put back in, the refurb on this one was not too bad, the brushes and armature were in good shape, so wee the bearings. If you end up looking at fatiqued wiring, really bad rust throw the motor away, it is simply not worth it
And of sourse new springs added to the brushes. The casings needed coated to prevent more rust so oiling the bearings will need to wait.
So the tear down, first things first
The standard motor, as can be seen it can be in very poor shape, as Imps have no fuses anything jamming this motor (including itself) can cause overload or short. No good.
Here is one removed from the car in normal condition and then with the motor removed.
Typical of removed part, the grate is very dirty, the cavity housing the motor well sticky and dirty.
Now the motor is held in with several screws on rubber bushes, be sure not to famage these busghes on removal and remeber to remove the ground wire to the shell or if it has been riveted in grind off the rivet, the motor will then pull free.
Now time to strip down the motor, the motor enclosure is steel and will be well rusted, maybe not but every one I seen has rust, including on the edges of the metallic laminated cores.
The outer casing shown above has already been media blasted clean, it wsa indeed covered in rust, very crusty indeed, no noles though, remeber all the moisture sits inside here and collects at the bottom, I have seen one or two of these perforated all way through on bottom.
motor stripped apart , contacts cleaned, polished and any rust brushed off and givern a fresh coat of high temp lacquer.
Ready to put back in, the refurb on this one was not too bad, the brushes and armature were in good shape, so wee the bearings. If you end up looking at fatiqued wiring, really bad rust throw the motor away, it is simply not worth it
And of sourse new springs added to the brushes. The casings needed coated to prevent more rust so oiling the bearings will need to wait.
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