Community Forums

GBDTN · 02-27-2018, 05:11 PM

This is the 4th or 5th valve core i have replaced in a year. Either they bend or the rubber seal at the little base seems non existent when Remove it. I ve been to a tire shop and a truck tire shop and everybody just shrugs. Has anyone had this problem? 100 psi motor home tires.

jelag · 02-27-2018, 05:26 PM

I've had my share of trucks over the years, and I can't remember having any issues with valve cores... I assume these are metal valve stems... My trucks have been in average climates.. I could only assume that vehicles kept in hotter summer climates might be more easily damaged from the heat..

Remember that these valve cores have rubber parts.. and could over a few years deteriorate with time... and heat..

If your concerned about this... you can purchase a simple tool from any of the auto parts stores and remove and change the valves...

GBDTN · 02-27-2018, 06:04 PM

Yes I have replaced those and have spares. Never had this issue before this home. Can t explain.

Gary RVRoamer · 02-27-2018, 07:03 PM

Maybe the chuck on your air gauge or compressor is damaging the valve core? The pin in the core can get bent or pushed sideways if the matching pin in the chuck isn't shaped right or is worn. I've seen fairly wide differences in chuck design, and one of mine always pushes the valve core pin sideways if I'm not careful to press press the chuck on at a right angle.

twinboat · 02-27-2018, 08:49 PM

Do you have balancing dirt in the tires ? That will tear them up, when checking the air.

homerbw · 02-27-2018, 10:18 PM

I had this same problem with one of my tires. After numerous valve stem replacements, I finally got tired of this tire going flat and made it my spare. No one could find the reason for this problem so your not alone.

Waiter21 · 02-28-2018, 06:36 AM

Next time you need to add air to the tire, before adding the air, get a small dab of silicon paste (Dielectric grease) and put it in the valve, then add air. When you add the air, it will open the valve and push some of the silicone paste down into the valve and seat. This will help lube and seal the valve stem.

GBDTN · 02-28-2018, 06:54 AM

Great ideas and thanks. It seems the brass looking ones are not as soft as the aluminum colored ones. I have bought two new gauges hoping the center is better. I can change a valve and only loose about 15 lbs of air now. Will try the plumbers putty.

Stranger · 02-28-2018, 09:20 PM

Plumber's Putty and Dielectric Grease are 2 entirely different critters. And hardly interchangeable.

Jus sayin'.

CharlesinGA · 02-28-2018, 11:11 PM

Are the stems rated for 100 psi? many truck stems are only rated to 80 psi. Make sure you have the right ones.

Charles

Gary RVRoamer · 03-02-2018, 01:45 PM

Quote:

Do you have balancing dirt in the tires ? That will tear them up, when checking the air.

Balancing beads might clog a standard valve, but I've never heard of one being "torn up" by it. I don't see how it could physically damage the valve core.

HGC · 03-02-2018, 01:59 PM

My buddy had put balancing powder in his tires and had BIG problems with it. Turns out you must use a longer valve in the stem because the beads
or whatever caused the shorter valves to not properly seat. He didn't have the correct valves in the tire for whatever balancing stuff was installed. If your are using anything like that the valves are longer. There are also different color valves for truck tires, if I remember correctly they are blue colored. Good luck!