| [Help] Temp drop=low air pressure in only 1 tire This is the second time in the last month or so. When the temp drops 20 or so degrees in a short amount of time, only 1 of the tires on my '04 G35 coupe loses about 15 psi. Once I refill it, it stays fine without any leaks or pressure drops. After it happened last time, I topped it off and it was fine for about a month until this morning when the temp dropped significantly.
I'm thinking it's either the rim or the seals(?) around the valve or TPMS sensor. Any other suggestions?
Thanks! |
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 mattmagPremium,ExMod 2000-03
join:2000-04-09
NW Illinois
kudos:3 |
15psi is a HUGE loss, and would likely be attributable to a rim leak, with the secondary chance of a stem leak. But I would go for rim, that is the most common cold-weather loss source.
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Beezel
join:2008-12-15
Las Vegas, NV | reply to forgotpasswo
Take a spray bottle and put some dish soap and water in it, and spray around the valve and rim to see if there are any bubbles. As mattmag said that is probably where you are going to find the problem.
If a rim leak, go to a tire shop and have them to check for damage and maybe put some bead sealer around the bead of the tire. Providing the rim isn't damaged. Of course they would fix the valve if it was bad also.  |
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| reply to forgotpasswo
Thanks guys. I will take it in to a tire shop and post an update. Since it's not a constant leak, the spray bottle test came out negative. |
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 shdesignsPowered By Infinite Improbabilty DrivePremium
join:2000-12-01
Stone Mountain, GA | reply to forgotpasswo
I've had similar issues with my Cherokee.
It is more of a problem on mag/aluminum rims as they expand/contract more with them and also corrode. In cold temps, the rim gets smaller and the tire gets stiffer.
As Beezel  said, bead sealer will usually fix the problem. I did have one tire shop put a wheel in a big bucket ans found air coming out where one of the wheel weights was. Rather than un-mount and remount the wheel, they just removed the weight and used a stick-on weight.
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Scott Henion
Embedded Systems Consultant,
SHDesigns home - DIY Welder |
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Beezel
join:2008-12-15
Las Vegas, NV | I have mounted new tires on alloy rims and used mag weights and as soon as I hit the weight and seated it on the rim. I could see a few bubbles come up from the bead lube you use when mounting tires. Stick on are best for alloys but a pain to get off when changing tires. |
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