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I got caught in the rain yesterday. When the wipers came to the center position, the passenger wiper caught the driver wiper and ripped the rubber from the driver wiper.
I assume this means they are not synchronized properly. How do I correct this problem?
OK, I am a procrastinator! I don't drive in the rain, so this is the first time I had to work on the wipers.
I turned the screw all the way in one direction (until it stopped). I could not get anything to happen. I then turned it all the way in the other direction (which was tightening it) until it stopped. I could not get anything to happen. I tried wiggling it, pulling it, pushing it, etc.
What is supposed to happen when the screw is turned. It may be that I am to gentle in trying to adjust it, but I did not want to break or bend anything.
Just to be sure, are both wipers supposed to be the same size. It seems things might work better if the passenger side wiper were a little shorter. I say this because it is the passenger side tip that is hitting the driver's side wiper in the middle of the driver's side wiper blade and getting tangled.
OK, I am a procrastinator! I don't drive in the rain, so this is the first time I had to work on the wipers.
I turned the screw all the way in one direction (until it stopped). I could not get anything to happen. I then turned it all the way in the other direction (which was tightening it) until it stopped. I could not get anything to happen. I tried wiggling it, pulling it, pushing it, etc.
What is supposed to happen when the screw is turned. It may be that I am to gentle in trying to adjust it, but I did not want to break or bend anything.
Just to be sure, are both wipers supposed to be the same size. It seems things might work better if the passenger side wiper were a little shorter. I say this because it is the passenger side tip that is hitting the driver's side wiper in the middle of the driver's side wiper blade and getting tangled.
Assuming you're talking about a midyear (your post doesn't say), photo below shows the fine angle adjusting screw operation inside the wiper arm. Unless the single rivet that joins the flat bar to the stamped arm is corroded solid, that rivet is the pivot point that allows the angle between the two parts to be changed. If you have the wiper arms correctly positioned on the transmission splines so the driver's side blade is below the passenger side blade as shown in the Assembly Manual, the adjuster screws allow you to set the blades parallel to each other. Both blades are 15", and they won't hit each other if they're properly adjusted.
JohnZ: Thanks for the picture. That explains why tugging and wiggling the wiper arm did not do anything. Good thing I did not tug too hard or I would have bent something.
If I am understanding the picture correctly, the center "thingie" is threaded, so turning the screw does not move the screw out of or into the wiper arm, but re-positions the thingie so that the angle of the arm changes slightly. Is that correct?
If so, then I think I need to angle the passenger arm up more and the driver's arm needs to angle down more.
Yes, the drivers wiper is on the bottom when the wipers are off.
If I am understanding the picture correctly, the center "thingie" is threaded, so turning the screw does not move the screw out of or into the wiper arm, but re-positions the thingie so that the angle of the arm changes slightly. Is that correct?
Yes, that's correct - turning the screw doesn't move the screw, it moves the threaded trunnion on the screw threads, which changes the angle between the two parts.
Thanks, that helped me understand what to do. It is now adjusted so the wipers just barely miss each other as they operate! I never would have guessed the screw was part of a trunnion; I thought it was a pressure adjustment to allow the arm to go longer or shorter. Your picture was the perfect way for me to understand.
Anyway, although it is adjusted, the best I could get it was not what I had hoped for. When turned off, it goes down properly, with the driver wiper in the bottom position, it looks like it is just barely touching the windshield chrome. However, if you pull the wiper away from the windshield and just let if fall back down, it rests at the bottom of the chrome, almost to the paint. I guess this means there is normally tension on the wiper and the chrome is acting as a stop to the wiper, so it cannot go down further. Is this normal?
Thanks, that helped me understand what to do. It is now adjusted so the wipers just barely miss each other as they operate! I never would have guessed the screw was part of a trunnion; I thought it was a pressure adjustment to allow the arm to go longer or shorter. Your picture was the perfect way for me to understand.
Anyway, although it is adjusted, the best I could get it was not what I had hoped for. When turned off, it goes down properly, with the driver wiper in the bottom position, it looks like it is just barely touching the windshield chrome. However, if you pull the wiper away from the windshield and just let if fall back down, it rests at the bottom of the chrome, almost to the paint. I guess this means there is normally tension on the wiper and the chrome is acting as a stop to the wiper, so it cannot go down further. Is this normal?
No, it's not. You should set the wiper arm position on the splines with the windshield WET (doing it dry leaves tension in the system); that way you'll get repeatable results. The wiper arm adjustment pattern (and the note for wet glass) is in your Assembly Manual (UPC 1, sheet E4).
The wiper arm adjustment pattern (and the note for wet glass) is in your Assembly Manual (UPC 1, sheet E4).
I looked in the assmbly manual. If I am looking in the correct place, I do not have that sheet. I have two manuals (I bought one from Ecklers when I bought the car not knowing there was one from Mid America Corvette in the box of parts) and both assembly manuals go from UPC 1, Sheet E2, Page E63 to UPC 1, Sheet 5, Page E64. Therefore the page numbers are consequtive but Sheets 3 and 4 seem to be intentionally omitted in both assembly manuals.
Am I looking at the wrong thing?
both assembly manuals go from UPC 1, Sheet E2, Page E63 to UPC 1, Sheet 5, Page E64. Therefore the page numbers are consequtive but Sheets 3 and 4 seem to be intentionally omitted in both assembly manuals.
Am I looking at the wrong thing?
Assembly Manuals were copied/re-copied and sold by many vendors, with varying quality and hand-applied page numbers; mine was from Millennium Industries, and the UPC 1, sheet E4 page has a hand-written "65" page number at the bottom. I'd scan it and post it, but my scanner picked today not to communicate with my computer; maybe someone else can post sheet E4.
P.S. The photo in post #2 is an excellent example of properly installed wipers.
Assembly Manuals were copied/re-copied and sold by many vendors, with varying quality and hand-applied page numbers; mine was from Millennium Industries, and the UPC 1, sheet E4 page has a hand-written "65" page number at the bottom. I'd scan it and post it, but my scanner picked today not to communicate with my computer; maybe someone else can post sheet E4.
Advice that I received a couple of years ago from John H.:
I have my blades set so the tip of the driver's side blade is 1" above the top edge of the reveal molding, and the tip of the passenger side blade is 2" above the top edge of the reveal molding, and the blades are parallel to each other when parked (use the slotted adjustment screw on the top edge of each arm to adjust their angle).
Never had the problem but the picture and what the screws are for is stored on my computer under Corvette C2
This is great John
Originally Posted by JohnZ
Assuming you're talking about a midyear (your post doesn't say), photo below shows the fine angle adjusting screw operation inside the wiper arm. Unless the single rivet that joins the flat bar to the stamped arm is corroded solid, that rivet is the pivot point that allows the angle between the two parts to be changed. If you have the wiper arms correctly positioned on the transmission splines so the driver's side blade is below the passenger side blade as shown in the Assembly Manual, the adjuster screws allow you to set the blades parallel to each other. Both blades are 15", and they won't hit each other if they're properly adjusted.
Last edited by TheSaint; Dec 22, 2012 at 02:46 PM.