Had a Tire Pressue Scare today.
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,466
Likes: 886
From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
2015 C5 of the Year Finalist
Had a Tire Pressue Scare today.
I've got a slow leak from the O-ring on my right rear tire aparrently, so today I stopped to add a couple pounds of pressure prior to hitting the dyno. I decided to bump up the left rear also while I was at it.
After about a 20 minute drive, I was clicking through the DIC and when I hit the rear tire pressures, had a shock. The left rear was at 25 PSI and went down to 23 over the course of the next 5 minutes while I made my way through downtown philly to the dyno shop.
Get there, don't feel any protrusions from the tire, but I can HEAR a faint hiss. Pull the valve cap off and it got louder. Took a look, and there was a VERY tiny O-Ring half wedged in the tip of the stem slightly depressing the core. I have no idea where it came from, but removed it and all is well. Probably came from the gas station tire inflator tip somehow.
After about a 20 minute drive, I was clicking through the DIC and when I hit the rear tire pressures, had a shock. The left rear was at 25 PSI and went down to 23 over the course of the next 5 minutes while I made my way through downtown philly to the dyno shop.
Get there, don't feel any protrusions from the tire, but I can HEAR a faint hiss. Pull the valve cap off and it got louder. Took a look, and there was a VERY tiny O-Ring half wedged in the tip of the stem slightly depressing the core. I have no idea where it came from, but removed it and all is well. Probably came from the gas station tire inflator tip somehow.
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,466
Likes: 886
From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
2015 C5 of the Year Finalist
Originally Posted by Dan_the_C5_Man
That tiny o-ring was from the valve stem cap itself.. Sometimes they work loose, I have one like that as well.
Whoops.
Le Mans Master
Joined: Oct 2004
Posts: 9,369
Likes: 4
From: Zephyrhills, Florida
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13
Yep, I had the exact same thing. I then bought a set of the cheapo plain black plastic caps and took the flat style washers out of them to use. The o-ring type seem to come out too easily and cause the problem. weird............
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by Fastbird93
Really? Is it ok to toss it?? Whoops.
Whoops.
