You didn't tell me this... 
72 wiper mechanism interference
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
72 wiper mechanism interference
Well I ran my wiper motor for the first time tonight. The original wiper motor that was on the car when I got it didn't work and was the wrong year anyway, so I changed it out for a rebuilt one.
Motor runs fine and all, however the big problem that I am having now is when the motor turns, the passenger side "arm" is hitting the back of the windshield wiper arm stop bracket.
I have attached a very brief 2 second video showing it in action. Any Ideas?
Scott
Motor runs fine and all, however the big problem that I am having now is when the motor turns, the passenger side "arm" is hitting the back of the windshield wiper arm stop bracket.
I have attached a very brief 2 second video showing it in action. Any Ideas?Scott
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Hi Scott-
The only way for that to happen is for the lever from the transmission to the bell crank to be bent or the stop bracket is bent or the bell crank with pivot is bent..
It's kind of hard to tell since it only cycles one time in the video.
I have good used transmissions if you want one to test with email me at support@willcoxcorvette.com
Ernie
The only way for that to happen is for the lever from the transmission to the bell crank to be bent or the stop bracket is bent or the bell crank with pivot is bent..
It's kind of hard to tell since it only cycles one time in the video.
I have good used transmissions if you want one to test with email me at support@willcoxcorvette.com
Ernie
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
Hi Scott-
The only way for that to happen is for the lever from the transmission to the bell crank to be bent or the stop bracket is bent or the bell crank with pivot is bent..
It's kind of hard to tell since it only cycles one time in the video.
I have good used transmissions if you want one to test with email me at support@willcoxcorvette.com
Ernie
The only way for that to happen is for the lever from the transmission to the bell crank to be bent or the stop bracket is bent or the bell crank with pivot is bent..
It's kind of hard to tell since it only cycles one time in the video.
I have good used transmissions if you want one to test with email me at support@willcoxcorvette.com
Ernie
Scott
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
Hi Scott,
Here are 2 pictures from my 71.
Both the wiper motor and wiper mechanism are the original.
Maybe you'll be able to spot something on your installation.
Is the wiper motor properly 'seated' on the firewall?…...is the nose extending into the wiper bay far enough?
???
Regards,
Alan
Here are 2 pictures from my 71.
Both the wiper motor and wiper mechanism are the original.
Maybe you'll be able to spot something on your installation.
Is the wiper motor properly 'seated' on the firewall?…...is the nose extending into the wiper bay far enough?
???
Regards,
Alan
Great pictures as always! I have seen many of yours while searching throughout the forum for answers before posting. Always so clean and clear.
The wiper motor looks good as compared to yours. I think the passenger side transmission linkage may be a little straighter on mine. Yours looks more curved and that may be my problem. Also when I look at your adjustment on the pivot for the transmission arm, it looks like yours is slid all the way over to the opposite side that mine is, leading me to believe that if I had more bend, my adjustment would look closer to yours.
Scott
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
You didn't tell me this...
And I think this is the problem Scott... 1968-1972 were different than 1973-1982. The rear ball for the right hand pivot arm is closer to the firewall and the length is different. I tried to watch the video again but I think the only way is to verify this is to post a picture...
I'll check and give you some measurements that should confirm this.
Ernie
Last edited by Willcox Corvette; Feb 22, 2016 at 01:59 PM.
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
I thought I had mentioned that. Although I do think mine looks a lot like the one Alan posted. If the ball is jutting out further towards the windshield than it should that would make it hit. Looking forward to those measurements!
Scott
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
There are three main differences... one you can check quick by the width.. the other is that the stud is 1/8" longer and also closer to the firewall due to the difference in the bend... I do believe this might be your issue. The passenger side rod comes very very close to the bracket on a car with everything correct.
Check it and see when you have time.. post back.
Check it and see when you have time.. post back.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I don't know what else is different, that's all I had time to investigate today. I have two NOS 68-72 arms, 1 used 73 and new one.. (I probably have more on cores).
My guess.. The change was the wiper stop bracket is probably different and they didn't have to worry about clearing the wiper door mechanism after 1972.
Alan you ever watch yours when it's running..... my arm gets very close to that bracket (probably 1/8" clearance).
Ernie
Last edited by Willcox Corvette; Feb 22, 2016 at 09:14 PM.
Le Mans Master
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
That is good to know!!!
THANKS Ernie-
Nice comparison- notice you have the stud t edge- but not center of stud to center of motor- If you could-I would like to know the "throw" difference.
Richard
THANKS Ernie-
Nice comparison- notice you have the stud t edge- but not center of stud to center of motor- If you could-I would like to know the "throw" difference.
Richard
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Well we are sure narrowing it down... lol
I knew it was the early one as soon as I saw your pic of the width.
So.. the only thing that leaves...
A) Bent Bracket (I don't think this is it)
B) Bent Transmission Lever. (Hard go imagine but possible). The lever is very strong but I wonder if possibly something didn't happen when the old lever got stripped of goofed up. The motor has enough torque to bend one that I do know.
Try tweaking the lever Scott, see if that helps. I've got a bin full of good used transmissions if you can't get it.
Ernie
Thread Starter
Advanced
Joined: Apr 2010
Posts: 65
Likes: 1
From: Fayetteville Arkansas
Well, after removing the wiper transmission, applying a little heat to the bend with a torch, little pressure and refitting it fits perfectly. Didn't even really feel like I made much difference in the bend but it made all the difference in avoiding hitting that bracket. I now have about 3/16 of an inch clearance. thanks for all he help!
Scott
Scott
