Repair or replace??
30 miles from our destination my TPMS indicated low pressure. Indeed it was. Had gone from 65psi this morning to 52 psi after 200 miles. Bought all four Goodyear Marathon ST225/75/R15 2 months ago. Al...
Forum Discussion
Don't blame the tire straight off without checking other things first.
Try swapping the sensor onto another wheel and see if that loses air. If it does, it's the sensor. Check the valve core to see if that is faulty.
Did you have new metal valve stems installed? If you did, it's possible that the tire shop messed up the grommet between the rim & valve stem. That's what happened to us. I had another tire shop install a new grommet on the inside and outside of all 4 rims. I stood there while the guy did the work to make sure he was careful. Zero leaking air after that.
Tire shops often have employees that do sloppy work. Ask a shop if they've had experience with valve stems for TPMS sensors first and ask who'd be the guy doing the work. The shop I originally went to get new metal valve stems installed claimed they couldn't get the grommets to fit into the hole on the outside of our aluminum rims so they installed them on the inside, despite the manufacturer having designed them to fit on the outside. When I eventually had all 4 rims redone, all that was needed was a bit of lube and some patience to massage the grommets into the holes. Aluminum and steel TT rims typically have a curved surface on the inside of the rim where the valve stem is and isn't a good mating surface for tightening the valve stem metal washers against. A grommet on the inside of a metal valve stem can be a good thing as the psi inside the tire forces the grommet against the rim.
If after inspecting the valve stems air still leaks, a tire shop can check for leaks in a dunk tank.
Try swapping the sensor onto another wheel and see if that loses air. If it does, it's the sensor. Check the valve core to see if that is faulty.
Did you have new metal valve stems installed? If you did, it's possible that the tire shop messed up the grommet between the rim & valve stem. That's what happened to us. I had another tire shop install a new grommet on the inside and outside of all 4 rims. I stood there while the guy did the work to make sure he was careful. Zero leaking air after that.
Tire shops often have employees that do sloppy work. Ask a shop if they've had experience with valve stems for TPMS sensors first and ask who'd be the guy doing the work. The shop I originally went to get new metal valve stems installed claimed they couldn't get the grommets to fit into the hole on the outside of our aluminum rims so they installed them on the inside, despite the manufacturer having designed them to fit on the outside. When I eventually had all 4 rims redone, all that was needed was a bit of lube and some patience to massage the grommets into the holes. Aluminum and steel TT rims typically have a curved surface on the inside of the rim where the valve stem is and isn't a good mating surface for tightening the valve stem metal washers against. A grommet on the inside of a metal valve stem can be a good thing as the psi inside the tire forces the grommet against the rim.
If after inspecting the valve stems air still leaks, a tire shop can check for leaks in a dunk tank.
