that is rust.
the pressure is about 1psi, max.
if use lips and block the port. you can suck on it and see all leaks.
it usually never leaks, air, due to carbon, packing the main valve shaft bushing.
it gets tighter and then sticks.
the rust is dark red. (dark orange is dust)
the ring in center is steel. and the outer lip
the body is alum. and i see only grease there.
there are many fail modes, ill try to list them
1
ticks at every stop sign. (valve shaft, carbonized)
2: packs in carbon
3:diaphragm leaks.
4: any or all gaskets missing or on 1996 up, 3 gaskets missing (2 on sidewinder sst tube)
5: main body cracked, one guy managed to get water in there and it cracked below 32F, truly, near impossible. but he did it.
for the the shaft to leak air, it would have to be very very loose. any very tiny leak can in fact be corrected with the ISC, and does.
i think it can (shaft) only leak at cruise, but when closed, valve, blocks access to this bushing closed. (right)?
the pressure is about 1psi, max.
if use lips and block the port. you can suck on it and see all leaks.
it usually never leaks, air, due to carbon, packing the main valve shaft bushing.
it gets tighter and then sticks.
the rust is dark red. (dark orange is dust)
the ring in center is steel. and the outer lip
the body is alum. and i see only grease there.
there are many fail modes, ill try to list them
1
ticks at every stop sign. (valve shaft, carbonized)2: packs in carbon
3:diaphragm leaks.
4: any or all gaskets missing or on 1996 up, 3 gaskets missing (2 on sidewinder sst tube)
5: main body cracked, one guy managed to get water in there and it cracked below 32F, truly, near impossible. but he did it.
for the the shaft to leak air, it would have to be very very loose. any very tiny leak can in fact be corrected with the ISC, and does.
i think it can (shaft) only leak at cruise, but when closed, valve, blocks access to this bushing closed. (right)?
http://www.fixkick.com