Brake Fluid Cap (Nissan)

by blandman512, published

Brake Fluid Cap (Nissan) by blandman512 Oct 25, 2016
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Nissan Leaf's Aerodynamics require a floor of fiberglas below the motor/drivetrain.

I was replacing my brake fluid today and dropped the cap down beyond the point of no return. I wasn't going to take the whole bottom off the car just for a little plastic cap.

I couldn't find a cap that would fit so I measured it out. 34mm widest point, 28mm cylinder around the top. This is designed to screw onto the existing threads.

I found the part for $13 on Nissan's website, but hey, 3D printer.

Here's the source model for adjusting: https://www.tinkercad.com/things/7JAe1vDGpbW-brake-fluid-cap/edit

My first prototype (that seemed to work after re-shaping), had no grip so I added edges, as well as adjusting the measurements slightly.

Safety Warning

It was brought to my attention that brake fluid is very sensitive to moisture. Having just 2-4% H2O moisture in fluid changes the freezing and boiling temperature of the fluid. See moisture related brake failures, I recommend spraying the underside of the cap with Flex Seal or another alternative that gives the cap a water tight seal when twisted tight. Anybody who has printed a cup should know prints can't hold out any kind of liquid.

Don't run this cap for more than a few days without some sort of seal. This would be a great temporary cap but shouldn't be trusted for long term use.

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Takes about 30 minutes with 2 shells.

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