Needless to say, the windshield wiper motor was
destroyed (melted) in the fire. I had a spare
motor, and found a second one on E-bay. Finally, a
friend gave me his extra motor. With three motors,
you'd think that one of them would have worked.
Wrong! Although some worked better than others, not
one had the strength to move the blades against the
I found a place that offered to rebuild wiper
motors, but they wanted $100 for the labor, and I
could not get them to even return an E-mail. So, I
opted to rebuild it myself.
First, let me give credit where credit is due. I
based the work shown here on instructions found on
a similar website about rebuilding a jeep. (Click
And the encouragement to attempt the rebuild came
from the nice folks at Bob's Classic Chevy discussion
Before continuing, I need to point out that if the
internal "flapper" mechanism of the wiper motor is
severely worn, you can rebuild the motor all you
want--and it still won't work. If you can't get a
good vacuum seal around the flapper, it won't move
with any kind of force.
I used to really wonder why Chevy used a
vacuum-powered motor instead of a simple electric
motor. But now, however, having rebuild both types
of motors (see heater section) I can say that
rebuilding a vacuum-powered motor is infinitely
easier than rebuilding an electric motor.