GlennD

Before I dig into my wiper system, I thought I better check to see if I have a problem or just have higher expectations.

When my wipers are on low speed, they appear a bit slow (when compared to other cars). I have lubed the bushings (where the wipers bolt on to) and all the knuckles/joints as part of the wiper mechanism.

So .. the question that I sure would appreciate help with ... what is the wiper speed of your 928 when on low? Is it a bit slow (compared to newer cars) or does it appear to be consistent with what you are seeing in your other non-928 vehicles? Say ... how many seconds to do a full wipe (the wipers starting, going to the end, and then returning back to the start ... and repeat)?

In advance, thank-you.
Glenn

jeff spahn

Mine is a bit slower than my Acura and Explorer when on low. Nice on Medium and great for downpours on Hi

Bertrand Daoust

Mine are a bit slower than on more modern car.
...And sticky like hell!

928 obsession

I could be wrong, but isn't there a wiper speed control wheel under the right side of the pod?

jeff spahn

Nope, that wheel is for the intermittent wiper function, when you move the lever down from neutral. There are three speeds up.
Like an old Norton (same side too). 1 down, three up.

Maleficio

My blades cling to the glass making them hop around. Drives me nuts. I've waxed the glass, applied Rain-X, whatever, works for about five minutes, then goes back to tacky/sticky op.

jeff spahn

I use the Rain-X wipers. No more sticky jump.

928 obsession

Thanks for the clarification. I had never tried using the slide, but had heard it had some relation with the windshield wipers.

Maleficio

Thanks. I'm gonna switch tonight.

Bertrand Daoust

Thanks Jeff.
Should try those.

PorKen

Slow wiping and/or whirring/grinding noise is usually a sign of a greaseless, bad bearing in the wiper motor. It is replaceable, but it's not a quick job. (A new wiper motor is >$400, vs. <$10 for a bearing.)

The bearing is 26 x 10 x 8 (often used on bicycles). I used '6000 2RS C3' to rebuild mine.

Mrmerlin

if your blades are jumping around try twisting the flat part of the wiper arm a bit to change the angle of the blades, a crescent wrench works well for this, spray the window with some water first so you dont overstress the motor or scratch the glass

dr bob

The grease in the wiper motor gear case gets hard with age. Consider r&r of the whole motor and mechanism for refurb if yours are that sticky. To remove, it's a lot easier if you remove the cowl panel at the bottom of the windshield. Side trim comes off, and a bolt on either side is exposed. Arms and the shaft nuts, plastic trim sleeves come off, and the motor and stuff can unbolt underneath for removal. I used some handy synthetic grease after prying the old stuff out.

Mrmerlin

Dr Bob this is also a great idea to RnR the motor as it will run faster once its cleaned and lubed

PorKen

If you go through the trouble of R&R'ing the motor, you should replace the bearing.