# Mechanical

## Engine Timing belt
- In 2007 Ford made this out of HydrogenatedNitrileButadieneRubber(HNBR)
  compound on outside, high strength fibers in middle, nylon on inside and coated with Teflon(PolyTetraFluoroEthylene(PTFE)), to not just resist but complement oil.
- Timing belts are still prone to failure, japanese cars(Honda) have chain
  instead.