The 280z had the original brake master cylinder check valve. I suspected that the valve was leaking so I decided to replace it along with the old vacuum hoses. Unfortunately replacement valves and hoses are not to be found (although reproduction hoses for the 240z are out there). I instead grabbed generic check valve and figured that I'd make my own hoses.
The new check valve was slightly smaller in diameter than the old so I printed a TPU ring to fill the gap. I painted the firewall mounting bracket for the valve.
To form the hoses i used a spring made for copper tube bending. I marked where the bends should be on the hose and used a heat gun to heat the hose in the areas of the bend to the point where the hose was slightly smoking. After naturally cooling the hose will have nice bends where heated and I've found this method to be quite effective when I need to shape a hose.
Was it restoration perfect? No, but it's good enough for me!
