'81 911 SC wiper noise / not working

[stripes]

My wipers made a clunk clunk noise and stopped working.

I've torn out the ventilation system but can't figure out the problem. If I turn on the switch, the wiper assembly vibrates and makes noise, but the wipers don't move.

I'm actually able to grab the wiper arms and move the wipers a few inches. When I do, the wipers work for one swipe across the windshield, and then when they get back to the park position they get stuck again making the vibration noise.

Thoughts?

[john walker's workshop]

let the motor park and turn off the key. place the wipers where they would normally park. pop out the speedo. get a short 10mm wrench and reach in and tighten the nut on the wiper motor that attaches to the mechanism.

[stripes]

I just tried and it was already fairly tight.

So I pulled the wiper motor and then took a peak inside. The large gear's teeth are chewed up in one area of the gear. Which would explain why I could move the wipers and then it would catch the good teeth then stop again on the bald spot.

Guess I'll look for a used one since they're almost $400 new.


Thanks