List:
One of the tires on the XJ6 will not allow me to add air to that tire. I was attempting to bring four tires to 35 pounds. I can delete air as normal in this tire by depressing the pin in the center of the valve, but not add. I can ad air the other three tires. I am using a tool as one would fine in a service station to measure the pressure. When adding air to the other three tires, I can near the hiss of the air inflating the tire. No sound from thIs one
I tried increasing the air pressure from the hose to 50 pounds but no luck.
What to do?
Lou
71 XJ6
Timeisrelative
(Jason Miller 1993 XJS 4.0 convertible, 1997 XK8 coupe )
2
It may just need re valved. Not sure exactly why it would let air out, but I not in though, unless the valve is recessed further into the valve stem on that wheel
Note the end on the hose you use to inflate the tire. Inside the nozzle that fits over the tire valve, you will see a nub, It is that nub that depresses the “pin” aka valve stem and allows air to enter the tire.
it may be a “tolerance stack”. both a tad short or one a tad short, etc.
Less likely: The PSI in the source must exceed the Psi in the tire. The more PSI in the source, the faster the tire PSI in the tire will rise.
From Teen years. fifty strokes on a hand pump would yield 30 PSI in a 600 X 16 tire.
With regard to my trouble inflating one of the four tires.
I looked carefully at the valve stem on the tire that I could not inflate and it was indeed slightly shorter than the others.
Then I checked the valve on the air hose. It has two air injectors, back to back, and the one I was using was slightly shorter (Warn?) than the other. Although the two are back to back, the second one is at an angle that makes inaccessible to the valve stem.
However, I was able to remove the parts of the unused air injector and swapped them for the non functioning parts.
That worked. I think the original was just warn as was the valve stem.