I installed new seals inside the petcock , but unfortunately it was also leaking at the front plate . I drilled out the rivets, I could not find an o-ring that Fits but made a seal from some epdm rubber i had . Epdm is not really fuelproof it is Used on flat roofs. It seems tot be fuelproof for some time , at least for thé period i tested it. Over time I can replace thé epdm if i notice a leak or of I find the o-ring or some other rubber or silicone.i think it Will hold long long time.......but when closing up I almost ruined thé petcock when putting selftaping screws in . One of them the tip broke of when attempnig to drill them in. I could not drill thé tip out ,it was to hard metal. I only had a 5 MM deeph hole left. I was able to put an M4 screw in it with some treathlock cut the head of and secure thé lid with a nut . It sure is leakproof and tight. After taken thé picture below i cut the epdm that was sticking out all around.. on thé inside the epdm just has a hole cut big enough to let thé mechanisme with thé ball move around. Thé only Parts that is left old where the Shaft o rings. They where not leaking. Not yet . Thé repair kit is not complete, it only repairs the vacuümsysteem. Sad......

 

 

Looks like an upgrade to me. Now instead of a sealed unit, you can service the seals and replace when worn

Maybe ask Santa for a tap and die set for Christmas

 

bicycle inner tube can also be used as a seal. did a testrun this afternoon, 100 miles, still perfect .