When Brian told me his idea of having a "If you're going to rice, make it nice" series, I laughed myself silly and thought it would be a great idea. His suggestion to put more effort and thought into the common asthetic modifications out there to 'truly' set the car apart sounded fun. And it was.
The goal behind this monowiper is to have it sweep the entire windshield. It will also sit in the factory position. That way you're not constantly looking at the thing and it's a bit more functional.
To begin, pull off the wiper arms and the black plastic cowl cover. Next, use a prybar or hammer end to seperate the driver's side wiper rod from the ball-in-socket type joint it's attached to. Pull the driver's side rod and wiper arm boss out set them aside, you won't be using either again.
Next, we have to remove the wiper arm spinner-thing (technical term) and the rod for passenger side. We'll be using these exclusively.
It's kind of tricky to get the arm out of the wiper motor side, because it's keyed to be in one way. You'll notice the oval shape of the hole in the pictures. This gives the wiper motor it's reference to down, by the way.
Now that you have the passenger side wiper rod and it's connection to the wiper arm, you can begin the modifications. It's good to know how the system works.
The motor pushes the rod in and outward, from left to right. This moves the wiper connector deal in a circle based on the length between where the rod connects and the nut in the middle. To make it sweep approximately 160 degrees, we'll move the socket ball inward. Again, this will make more sense when you're doing this yourself and study the pictures.
In case there was any confusion, the thing I don't know the name of (wiper arm spinner, boss, connector deal, blah blah blah) is this:
Brian's done this before, and I consider him an expert in the field of do-it-yourself true monowiper modification on CRXs. If there's any question to this, it'll be dispelled by the amount of effort and thought he put into modifying the wiper spinner.
First off, you have to remove the old ball-pin from the spinner. Brian grinded the mushroomed end on the other side off and forced it out. Next, you have to figure out where to drill a 13/64th inch hole in the spinner's rod arm to get 160 degrees of sweep. The factory length from the middle to the middle of the original hole is 1.8125in. We put ours at 1.625. The reason we chose this is simple: The length between the center pin and motor-end hole on the other side of the rod is slightly greater than 1.625in. The same length would be 180 degrees of sweep. Brian did it slightly less. I imagine he did a quick mental calculation from his experience with the modification.
I imagine a very close relationship could be made comparing the angle the passenger arm transverses originally and the original length compared to 160 degrees, or whatever angle you want. Remember to consider the length of the wiper-blade and where that might hit the cowl. You can make the monowiper as hard as you want, as you can plainly gather. :)
Brian threaded the ball-pin at 1/4in by 20 threads. Additionally, he ground the inner part of the ball to accept a 5/16in wrench. Worked great!
From here on out, it's just reinstallation. Brian recommends using the driver's side arm as the one for your monowiper.
And of course, testing on the dirty windshield.
There it is, folks.
Many thanks to Brian for letting me hang out in his garage and have too much fun.