Tires are losing up to 10 psi in 5 days, OK??

[iteachflyin]

Last Saturday I put EXACTLY 30 psi into each of my brand new GY F1 GS EMT's. I then drove the car for approximately 125 miles on the same day. Then, between the weather and whatever, I didn't use the car until today, Thursday, 5 days later (perhaps 2-3 miles in between but can't remember). Furthermore, today the RR LOW PRESS DIC warning popped up and my RR was 20 psi and LR was 22 psi, while my both fronts maintained 29 psi. I am trying to compile a list of issues for dealer resolution under my 3mo/3k miles B2B warranty, since my car is GM Certified. The question I have is simply whether it is reasonable to assume that the rear tires would lose substantially more psi to the cold NY weather this week than the did the fronts. These new EMT's were mounted twice already by a tire service used by the dealer due to incorrect valve stem cores and some balancing and alignment issues. Could the rims possibly be bad? I have good tire caps with good o-rings on all tires. I reset the cold psi tonight to exactly 30 on each tire, then ran about 100 miles with no issues at all. The tires ran up to no more than 32-33 and after sitting an hour or so in the cold went down no lower than 29. I don't want to make a mountain out of a mole hill but these were very expensive tires and I'm sure that goes for the rims as well, so I want the dealer to make good on any possible issues. I know, this is a long-winded discussion about psi. Thanks for reading it.

 

[DRTH VTR]

That does not sound right to me. It sounds like you have some kind of slow leaks.

 

[iteachflyin]

That does not sound right to me. It sounds like you have some kind of slow leaks.

Thanks, I was hoping to see some downward movement in my rear pressures tonight on the 100 drive, but none. I'll just have to explain it to the dealer exactly as I did in my original post and hope he sees it as a psi issue requiring resolution.

 

[mel 2001]

I had a slow leak also. Turned out to be air getting around the weight attached to the rim to balance tire.

 

[74bigblock]

Just put some tape on them, they will be fine.

 

[jwilliams]

That much air loss is NOT normal. 1 psi every 30 days is an acceptable amount of air loss. You have leaks. May be as simple as leaking valve cores, leaking o-rings on RFT sensors or a nail in the tires. You can easily check the valve cores and stems, just spray some windex or soapy water on the stems and look for bubbles. I'd have the dealer check the tires for nails and repair them PROPERLY per goodyear's guidelines for fixing RFT tires.

 

[XLR8]

Just put some tape on them, they will be fine.

You are a hoot, my friend!


As to the subject of the thread... I may be out in left field here, but is it possible the sensors are damaged or otherwise working sporadically? You related that the EMTs have been mounted twice already. Seems that I read in another post a member recommended changing the sensors when changing the tires due to issues created during change out.

I believe I even read something about it in the Tech Center section.

Sorry, this may not be of any use. I thought I'd made a note about it but can't find it now.

JAG

 

[iteachflyin]

You are a hoot, my friend!


As to the subject of the thread... I may be out in left field here, but is it possible the sensors are damaged or otherwise working sporadically? You related that the EMTs have been mounted twice already. Seems that I read in another post a member recommended changing the sensors when changing the tires due to issues created during change out.

I believe I even read something about it in the Tech Center section.

Sorry, this may not be of any use. I thought I'd made a note about it but can't find it now.

JAG

Interesting, but the sensors matched my tire pressure gauge readings and the DIC was dead-on 30 psi after I filled them to 30 psi.

 

[iteachflyin]

I had a slow leak also. Turned out to be air getting around the weight attached to the rim to balance tire.

Again interesting in that one of the reasons the tires went back to the tire center, besides for remounting due to the wrong valve stem cores, were that they needed to be re-balanced. I have new valve caps on securely so I don't think the o-rings are the problem, nor do I really think I picked up nails in both tires. I am hoping it's not bad rims, because I can foresee a huge battle with this particular dealer about that.

 

[XLR8]

Interesting, but the sensors matched my tire pressure gauge readings and the DIC was dead-on 30 psi after I filled them to 30 psi.

Sorry, just a thought. ... Ahh, but it is definitely a pressure loss, not an incorrect sensor reading. In my haste to be helpful I didn't think it through. My mistake.

In that case I would look at the usual suspects ie nail, stems, or heaven forbid - rims themselves.

 

[74bigblock]

Sorry, just a thought. ... Ahh, but it is definitely a pressure loss, not an incorrect sensor reading. In my haste to be helpful I didn't think it through. My mistake.

In that case I would look at the usual suspects ie nail, stems, or heaven forbid - rims themselves.

.... don't forget the tape!

 

[LT4man]

Did the installer use some sort of goop around the rim where the tire bead sits? All goops are not alike. I would call around to tire stores and try to get an idea about which goop is the best. I had new F1 GS D3's installed a little over a year ago, and I lose no pressure at all. Except when there is a severe temperature change. I am in Chicago and the temperature is constantly changing. There is joke about this: If you don't like the weather, stick around 10 minutes because it will change!
Save the Wave!

 

['04 Torch Red]

" I have new valve caps on securely so I don't think the o-rings are the problem.......

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Valve caps do not hold the air in your tire...valve caps are just dust and dirt protectors so none enters the valve area....

 

[Craig-o]

I had a similar experience when I had tires installed, but it was only 1 wheel that was losing pressure at about 6 PSI in 2-3 days. Turned out to be the crimp-on weight interfering with the seal. The tire shop removed the wheel, submerged it for a few minutes, and was able to detect the leak around the weight. The technician removed the weitht, and re-balanced, this time using stick-on weights rather than the crimp-on ones.

Hope this helps.

 

[mel 2001]

I had a similar experience when I had tires installed, but it was only 1 wheel that was losing pressure at about 6 PSI in 2-3 days. Turned out to be the crimp-on weight interfering with the seal. The tire shop removed the wheel, submerged it for a few minutes, and was able to detect the leak around the weight. The technician removed the weitht, and re-balanced, this time using stick-on weights rather than the crimp-on ones.

Hope this helps.

Exactly what I said. Only you said it better.

 

[iteachflyin]

Originally Posted by Craig-o
I had a similar experience when I had tires installed, but it was only 1 wheel that was losing pressure at about 6 PSI in 2-3 days. Turned out to be the crimp-on weight interfering with the seal. The tire shop removed the wheel, submerged it for a few minutes, and was able to detect the leak around the weight. The technician removed the weitht, and re-balanced, this time using stick-on weights rather than the crimp-on ones.

Hope this helps.

Exactly what I said. Only you said it better.

Thanks. It's at the dealer and hopefully they'll get it to the tire shop they used to install these tires to check things out. It still amazes me that a 31 year old Chevy dealer, the largest dealer of any kind in our county, that clearly sells Corvettes and has them on their showroom floor, doesn't support tire work on them. They farm out all of the Vette tire work and I have had nothing but trouble with the quality of the tire work done by their vendor.

 

[I_R_DA_ONE]

I run the tire pressure up to about 40#,,, then stick them in the bath tub and you will see the leak no matter how small...

Just remmember to lower the pressure to normal before installing them again....

and if you find no leaks, at leaste you get your wheels and tires clean....

 

['04 Torch Red]

It still amazes me that a 31 year old Chevy dealer, the largest dealer of any kind in our county, that clearly sells Corvettes .....
=========================================================

You mean its bigger than Kerbeck Corvette???I thought Kerbecks was the largest.....they sell more
Corvettes than anyone else..thats a fact...

 

[bossvette]

I have Z06 wheels on mine and have not been able to set the tire monitoring system so I use the good old guage every now and then; my pressure never varies more then 2 lbs and then only with weather extremes. So my guess is you have a slow leak somewhere.

 

[iteachflyin]

[QUOTE='04 Torch Red]It still amazes me that a 31 year old Chevy dealer, the largest dealer of any kind in our county, that clearly sells Corvettes .....
=========================================================

You mean its bigger than Kerbeck Corvette???I thought Kerbecks was the largest.....they sell more
Corvettes than anyone else..thats a fact...[/QUOTE]

I think you read county as country ... I'm talking about Rockland County, NY.