brashear
Computer
- Mar 5, 2005
- 83
One of the fuel injectors in my car developed a leak on the inside valve. This got me thinking - why is the needle seal metal-to-metal? With the different types of fuel resistant polymers and elastomers out there today (ex. PTFE, PFA, Delrin, Viton rubber) , wouldn't it be more reliable and less costly to make the needle seat on something softer?