urg8rb8

I can't figure this out. One day I get a warning telling me my left-rear tire is low in air pressure. So I check the tire for nails or any other punctures and I find none. So I put some air in the tire to bring it to the same level as the other 3 tires. Since that day, that tire gradually lost air pressure and just settles down to 23 PSI.

There was a sudden drop in weather temp in Miami to like 50 degrees. I turn my car on and it tells me that my left-rear tire is at 23 PSI and the other 3 tires are at 24 PSI. After driving for like 2 miles, the three working tires went up to like 27PSI and the non-working tire only went up to 24 PSI. I find it weird that the tire pressure of the "bad" tire doens't increase at the same rate as the other 3.

I checked again for tire punctures and I find NONE!!! Can someone please explain to me what is going on? I also used a manual tire pressure gauge and it is reading what the tire pressure sensor is reading.

Thanks for your help!!

MyBlueC5

Obviously the air is going somewhere, if you can't find a hole/nail, etc, etc... I would take the tire to a tire shop and let them soak in one of those basins... or you could squirt some soapy water all over the tire. (the water basin works better)

I would guess if you can't find any hole, I would squirt some soapy water on the valve stem.

If none of the above helps, then the only other thing I could think of is a poor seal between the bead and wheel. (imperfections, trash, etc, etc...)

Just need to eliminate one thing at a time.

Mark

ericdwong

Agree with the above- use soapy water. I noticed on mine it was leaking from the valve stem. Other sources would be nail on tread.

dragon84

pull it off and and put in in the tub.. Well I can get away with doing that due to no wife. If you can't do that a tire shop can find it pretty quick. and plug/patch it fairly cheap.

billiam01

You have a slow leak, and apparently a tiny one that you can't see but a good tire installer can find it. This leak closes up at a certain psi but opens up at higher PSIs. I have had leaks like that before.

urg8rb8

Well, I can't find a nail... so it has to be something non obvious. Maybe the valve stem is messed up. The car isn't even a year old yet.

HummelS

I would bet on the valve stem - since you have the pressure sensors, it may be a bad seal.

urg8rb8

How does such a leak start up?

urg8rb8

You think factory warrenty will cover it?

bpc4me

could also be the cold???

mcronec5

I had a slow leak in my right rear. I drove 30 miles to a tire place and hit 100mph on the way. They found 3 screws, and 2 nails in my tire. I was lucky. I cannot believe I hit 100mph with pieces of metal in my tire. No I don't drive through construction zones.

ArKay99

I had the same thing happen to me last winter. It turned out the locknut on the tire sensor valve stem was loose. I tightened it up and it's been fine since.

mrm1149

same here, try it..............

VLVETTE

Mix up a little snoop (dish soap and water) in a squirt bottle.Pump your tire up a little high 35 psi or so. Pour it on to the tread and let it run down you might have to roll your car a few times. I would start with the valve stem.

CCA Corvette Parts

Could be a nail as well. The last one I had on my DD busted the head off the nail and the rest of the nail went slightly deeper into the tread. Could not see it with the naked eye, but when we filled it with air and put it in the tub, she bubbled like crazy.


Peace
Willfulone

C5dream

Could be oring on pressure sensor. Need to try the soap/water around valve stem.

eddie44

I'd start with the valve stem if you've examined the tread thoroughly.

I hope you're not counting on the tire sensors to be accurate! Mine are two to three pounds off. I always use a good quality gauge and the sensors are only to monitor the pressure.

lanceg1041

I just had a slow leak repaired. Turned out to be a tiny bubble of air from the bead area. The tech had to scrape the bead with a brush and put some sealant on the bead. best 12 bucks I ever spent.

00BlackConv

I had the EXACT same problem and the tire shop took off the tire, put a rubber sealent around the inside of the rim where the rubber meets the metal and it was fine. It then happened on my other tire and that tire just needed a new O ring in the sensor. Hope this helps.

Bill Curlee

Here is what the tire pressure sensor and valve stem look like.









The cap/nut that secures the pressure sensor to the rim need to be torqued down to 106 inch pounds. That is INCH pounds not foot pounds!

Bill C