Brake Fluid Cap (Nissan)

thingiverse

I'm working on my Nissan Leaf and its aerodynamics require a fiberglass floor beneath the motor and drivetrain. Today, I was replacing the brake fluid when I dropped the cap down beyond recovery. I wasn't going to remove the entire bottom of the car just for a small plastic cap. I searched for a replacement but couldn't find one that fit. The original cap measures 34mm at its widest point and has a 28mm cylinder around the top, designed to screw onto existing threads. I found a suitable part on Nissan's website for $13, but then I remembered my 3D printer. Here is the source model: https://www.tinkercad.com/things/7JAe1vDGpbW-brake-fluid-cap/edit. My first prototype worked after some re-shaping but had no grip, so I added edges and adjusted the measurements slightly. Safety Warning Brake fluid is extremely sensitive to moisture, and even 2-4% H2O can affect its freezing and boiling temperatures. Moisture-related brake failures are a real issue, which is why I recommend spraying the underside of the cap with Flex Seal or another similar product that creates a waterproof seal when tightened securely. If you've printed a cup before, you know prints can't hold liquids. Don't use this cap for more than a few days without some kind of seal. It's great as a temporary solution but shouldn't be trusted long-term. Print Settings Printer Brand: MakerBot Printer: MakerBot Replicator 2 Rafts: Doesn't Matter Supports: No Resolution: 0.2 Infill: 15 Notes: Takes about 30 minutes with two shells to print.