Nissan 200SX S13 Wiper Pivot Mount
by disaffected, published
This is a replacement for the center plastic wiper pivot for a Nissan 200SX S13 (nb: may also fit an S14). The mount can and does fail over time and is the source of the squeak you often hear from the wipers. It's especially prone to breakage when you attempt to remove it to fix a problem with the wiper connecting rods (which is what happened to me).
ABS is probably the best material for the job - cars get hot and PLA with its lower melting temperature is likely to warp.
Keeping older cars on the road is something of a challenge, especially when the manufacturer's supply of original parts is exhausted. The beauty of the 3D printer is the ability to produce your own replacements (within limits).
The parts are designed to print flat without support. To assemble:
Print out one each of the mount and insert and glue the insert into the bottom of the mount (it should fit without any fettling required.
Cut three M6 coach screws so about 20mm of thread remains (this is thread past the head and the square part of the neck).
Glue the coach screws into the mount, inserting from the top. The mount is designed to trap the square heads of the coach screws to prevent them turning, but a little glue always helps. I've included the sketchup source file in case anyone wants to redesign for hex head bolts.
Grab our original part and remove the old plastic mount by removing the split ring and pulling it away from the pivot.
Clean rust from the pivot, grease liberally and reassemble with your new mount.
- Install back in your car and you're done!
The STL produced by sketchup is a bit buggy, but it seems to print OK.