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Thank Bernie. You were correct that when both wipers moved freely together it was because the nut holding the wiper motor crank arm came loose. However, properly aligning the crank arm seems nearly impossible. Why Saab didn't engineer in a positioning pin is unclear. I've got it close, but the wipers do sweep down a little bit just before they park, just touching the cowl before parking. I'm concerned about how this might work with snow buildup. Also, because the crank needs to be aligned almost in-line with the lower connecting linkage such that the linkage is shifted all the way to the driver's side, accessing the nut is not easy and blind, even with a ratcheting wrench. Any tips on improving the alignment for if I ever take this apart again? Should the linkage be exactly in line with the crank? That cowl is fragile so I don't think I'll bother unless the wipers break. I made cardboard tracings of the wiper position relative to the studs before pulling them, but that only helped so much with the crank arm free. (I assume the motor comes with the crank arm indexed?)
Thank Vlado B. for the tip on the OTC 6676. That worked great compared to the Lisle 54150.
General tips. The wiper studs/nuts are M10x1.5 in case you need a nut/die/tap (I needed a tap and die as the thread on one stud got messed up with the puller). The motor crank arm nut is an M8. It's probably M8x1.25, but I didn't check a my nut was siting there (mine was gold in color from the yellow zinc plating). I could only source a split ring lock washer in stainless that day which I know some say are useless. Next time, it could be worth the hassle of a Nord-lock washer, provided I could apply the extra torque needed for those and knew exactly where to position the crank arm. I used some thin plastic card stock to remove the plastic caps on the wiper nuts and help remove the two plastic screws as well as pop the cowl over the metal lip toward the front, under the rubber gasket.
Tools needed:
Philips screwdriver
13mm ratcheting wrench or possibly a socket with low profile ratchet (for crank arm nut)
17mm socket (for wiper stud nuts)
Optional wiper puller
Optional card stock or pry tools
Optional PB Blaster or similar
Optional stubby ball-peen hammer as the clearance is tight with the hood
posted by 108.6.36...
2
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