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914World.com _ 914World Garage _ Why, oh Why Wipers!
Posted by: PDXBob Feb 3 2025, 10:02 PM
I’m pretty sure I know the answer, but hoping I’m wrong. My wiper motor is operating very, very slowly. I’ve cleaned the arms and all joints but no improvement. So, my question is: can you remove the wiper motor without taking out the gas tank? Car is a 1975 914, I’ve had tank out once, just a lot of work.
Thx,
PDXBob
Posted by: L-Jet914 Feb 3 2025, 11:48 PM
According to the FSM directions say to remove tank, fresh air blower box, then wiper motor/arm assembly.
Posted by: mepstein Feb 4 2025, 02:16 AM
Removing the fuel tank is the easiest part of that repair.
Posted by: ConeDodger Feb 4 2025, 06:26 AM
Ground.
Posted by: PDXBob Feb 4 2025, 03:01 PM
Ground.
Found ???
Posted by: fiacra Feb 4 2025, 06:21 PM
Ground.
Found ???
To put it in long form: you should find and clean all grounds before going to the trouble of pulling everything apart only to find your problem was caused by a poor ground.
Posted by: ConeDodger Feb 4 2025, 09:58 PM
Ground.
Found ???
To put it in long form: you should find and clean all grounds before going to the trouble of pulling everything apart only to find your problem was caused by a poor ground.
Yes, thank you for expounding on what I quickly typed at 0500. I had to lecture today so I took a Quick Look at the site before my shower.
Electricity likes a circle. If your grounds are corroded, you don’t complete the circle. Should be a brown wire IIRC?
Posted by: ClayPerrine Feb 5 2025, 12:28 PM
Another common cause of slow wipers is the shafts getting corroded where they come up through the cowl. When you pull the wiper assembly, take the shafts out of the frame, then clean them up and lube them.
Water stands in the dimples where the shafts come through the cowl, and it gets down in between the shaft and the frame, rusting the shaft. Then they run slow due to excessive friction.
Happens to the 911 guys too. But not quite as bad.
Posted by: Eric_Shea Feb 5 2025, 06:30 PM
When (if) you get there... make sure you remove the speedo so you can get at the M6 (10mm) nut holding the rubber isolator from the bulkhead. If not, it rips (found out the hard way). 914Rubber made some new ones though. This guy...
https://pmbperformance.com/products/windshield-wiper-offset-isolator-for-porsche-914-all-years?_pos=5&_sid=5037af149&_ss=r
Posted by: VaccaRabite Feb 8 2025, 09:06 AM
Short answer - do anything you can to avoid pulling the wipers.
But if you DO pull the wipers, plan on doing a lot of other maintenance while you have all that other stuff out of the car. Like the under tank fuel lines, moving the pump under the tank if you have an early car, replacing the filter if you have a later car.
To avoid pulling stuff out, clean your grounds as stated. And also spray lithium grease down the shafts. Wiggle them around, however you can get it in there.
Pulling the tank out isn't that bad of a job. Getting the airbox out SUCKS.
Zach
Posted by: 914werke Feb 8 2025, 11:31 AM
Water stands in the dimples where the shafts come through the cowl, and it gets down in between the shaft and the frame, rusting the shaft. Then they run slow due to excessive friction.
Yup I detailed the issue in an earlier thread (with pictures) :
http://www.914world.com/bbs2/index.php?s=&showtopic=359278&view=findpost&p=2996358
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