I recently purchased (6) Toyo M154 245/75 R22.5 tires for my MH from Les Schwab Tires.I checked the tire pressures when I got home. The pressures were correct (105psi front and 95 psi rears) The valve stem cores did not seat after I removed my tire pressure gauge from the front tires. I needed to use the valve stem caps to prevent the tires from deflating.I returned to Les Schwab Tires to get replacement cores, which seemed to correct the issue. I also took in my tire gauge and air-compressor filler with gauge for them to calibrate and verify that they were not a part of the issue.I experienced the same issue again and returned to Les Schwab Tires and they again replaced the valve stem cores with no issues. I now have low pressure in the front tires (85psi) and the valve stem cores did not reseat after pressuring up the tires to 105 psi. I'm relying on the valve stem caps to maintain pressure.Any thoughts about what is happening?

one would think a tire store like this would know exactly whats going on and correct the issue? seems real odd to me if the situation is as postedDid u by chance have balancing beads installed to balance the tires?

Did they replace the valve stems or valve cores?I would have had new metal valve stems installed. Some take a different style of cores which my Les Schwab knows about.

if you have beads in your tires for balancing purposes you need to have long stems installed. The beads get up under the valve stem seat inside the tire and wont seal.

enblethen wrote:Did they replace the valve stems or valve cores?I would have had new metal valve stems installed. Some take a different style of cores which my Les Schwab knows about.OP thread headline says quote: valve stem core issues

Terminology in some cases can be difficulty.If the valve stems were not replaced and new cores were just installed, there can be debris that can cause issues. Valve cores can have different material for proper sealing especially in those that require higher pressure such as truck and large RV tires.

Toyo M145 valve stem core issues | Good Sam Community

17 Replies

msmith1199
Explorer II
Aug 31, 2016
lj2654 wrote:
if you have beads in your tires for balancing purposes you need to have long stems installed. The beads get up under the valve stem seat inside the tire and wont seal.

X2. I had tires installed at Les Schwab and had the exact same problem and it was caused by them using incorrect valve cores for the balancing beads. Took a couple of trips to get them all completely fixed correctly. I like Les Schwab because they went way out of their way to get it fixed, but not all of their techs seemed to understand this issue.
usersmanual
Explorer
Aug 31, 2016
enblethen wrote:
Terminology in some cases can be difficulty.
If the valve stems were not replaced and new cores were just installed, there can be debris that can cause issues. Valve cores can have different material for proper sealing especially in those that require higher pressure such as truck and large RV tires.

seeing as its a problem twice in a row and after he gets home and just the front tires I firmly believe its caused by balancing beads but surely the Christ a Huge truck tire outfit like Charles schrawb would most certainly recognize such
enblethen
Nomad
Aug 31, 2016
Terminology in some cases can be difficulty.
If the valve stems were not replaced and new cores were just installed, there can be debris that can cause issues. Valve cores can have different material for proper sealing especially in those that require higher pressure such as truck and large RV tires.
usersmanual
Explorer
Aug 31, 2016
enblethen wrote:
Did they replace the valve stems or valve cores?
I would have had new metal valve stems installed. Some take a different style of cores which my Les Schwab knows about.

OP thread headline says quote: valve stem core issues
lj2654
Explorer
Aug 31, 2016
if you have beads in your tires for balancing purposes you need to have long stems installed. The beads get up under the valve stem seat inside the tire and wont seal.
enblethen
Nomad
Aug 31, 2016
Did they replace the valve stems or valve cores?
I would have had new metal valve stems installed. Some take a different style of cores which my Les Schwab knows about.
usersmanual
Explorer
Aug 31, 2016
one would think a tire store like this would know exactly whats going on and correct the issue? seems real odd to me if the situation is as posted
Did u by chance have balancing beads installed to balance the tires?

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Toyo M145 valve stem core issues

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