My 2004 RX330 2WD Goodyear Eagle tires (all four) keep losing air! No matter how much air I put in, the pressure still goes down 10 PSI by the next day. The tires are 6 months old and when I checked the tires, there are no holes or cracks or nails on them. Has anyone else had this problem? Any help is greatly appreciated.

 

Are the tires hot when you inflate them? The pressure in hot tires is greater than cold tires (due to heat expansion) and when the tires cool off, the pressure lowers. This might give you the impression that pressure is being lost. Seems strange that all four tires are having the same problem. Either that or someone is letting them down to drive you crazy!

 

I have had to pull the tires off of aluminum wheels and have the bead seat cleaned up so that the tires would stop losing air. But, this is in a car with 10+ year old aluminum wheels. The tire guy says that this happens as wheels get old. doesn't happen with steel wheels. Your car, oth, is only three years old and shouldn't be having this problem. If it is all four tires, then i would suggest that this is tire related and I would pull all four tires, clean the bead seat and have them remounted.

 

10 pounds a day is not trivial. You need a new tire guy.

 

There is something wrong....losing 10 psi is not normal...are you sure about this? How do you put air? In a gas station? Or do you have your own pump? What gage do you use?

 

Sounds reasonable. I remember when the first aluminum wheels came on the market (they called them "mags" even though they were NOT magnesium), many owners had the same problem. The leak was traced to the porosity of the aluminum wheel that allowed air to seep through. Back then they cured it with a coat of paint sprayed on the INSIDE of the rim (keeping the bead area clear). A clear acrylic worked fine.

Another possibility - I ran an OEM set of GY's on a Mustang across Arizona at speeds over 100 mph many years ago when bias-belted tires were new. The cheap OEM's began to separate internally - the belts separating from the body. No external damage was visible, but when you took the tire off the rim you could hear a faint hissing sound . . . Putting the tire in a water bath showed air was still leaking out of the carcass on the inside of the tire, even with the tire off the rim. A trip to the GY dealer confirmed what a service station (remember those?) had found - the belts had broken free inside the rubber and the air inside the tire was escaping into the belt area, from where it would seep to the outside at high speed.

Have a good GY dealer check your tires - they will honor the guarantee, but probably offer only a pro-rated deal on a new set. Me? I'd learned my lesson and went across the street and bought 5 new Firestones.

 

Wow, so this crap can happen.....

 

Down here, we use the water bath method to find the leak.

I continue to use nitrogen in the tires and won't go back to regular air.

 

Got ot get the nitro......Costco has the nitro....

 

That does sound odd! If it were me, I would pull off a tire, plop it into a kiddie pool, and find where the air bubbles were coming from. I would assume it is from a poor bead seal. Like stated above, they can wire brush the rim so it is not corroded, and then use a liquid bead seal before reinstalling.

It could just be a very poor tire place. Be prepared to go to another one.

 

Plus nitro is lighter, you can get 5 more hp from nitro. I carry a cylinder of nitro in my cargo area all the time.

 

Best bet is to take it to a reputable tire dealer or to your Lexus dealer

 

Take it in to the dealer and then ask a 2nd opinion on a tire retailer.