Since I have a pending road trip and would like one less worry (the dreaded windshield wiper highway detachment syndrome) I thought I'd give a go at inserting a grub screw through the wiper arm base into the splined post to lock them on. A dicey proposition on paper and in reality.
Here's the 2mm tap & drill set and the M2 6mm grub screws:
First I marked the position on the arm that I wanted to drill, it's on the underside so you won't notice the hole without really looking for it. I used a spring loaded punch to mark the drill bit location:
Next up is the drill, I stopped the wipers in the full sweep up position on the windshield, marked off a little over 6mm on the bit and made sure it was square going in (it goes about 3mm into the spline, not just the wiper arm). Dicey operation #1:
I blew out the hole with compressed air, put a little penetrating oil on the tap and started dicey procedure #2. I turned in a couple revolutions with some pressure then back out and cleaned the threads of the tap, this is critical to do and you have to go slow and add some oil each time. I did this until the tap bottomed out in the hole. The black ink mark tells me when I'm close:
Next I blew out the debris after tapped all the way down then fitted the screw:
And all the way in, tightened down, they are not going to fly off, and are not noticible when viewing from the front:
Ready to roll!!!
Here's the 2mm tap & drill set and the M2 6mm grub screws:
First I marked the position on the arm that I wanted to drill, it's on the underside so you won't notice the hole without really looking for it. I used a spring loaded punch to mark the drill bit location:
Next up is the drill, I stopped the wipers in the full sweep up position on the windshield, marked off a little over 6mm on the bit and made sure it was square going in (it goes about 3mm into the spline, not just the wiper arm). Dicey operation #1:
I blew out the hole with compressed air, put a little penetrating oil on the tap and started dicey procedure #2. I turned in a couple revolutions with some pressure then back out and cleaned the threads of the tap, this is critical to do and you have to go slow and add some oil each time. I did this until the tap bottomed out in the hole. The black ink mark tells me when I'm close:
Next I blew out the debris after tapped all the way down then fitted the screw:
And all the way in, tightened down, they are not going to fly off, and are not noticible when viewing from the front:
Ready to roll!!!
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