Run-flat event
Thread Starter
Drifting
Joined: Mar 2018
Posts: 1,301
Likes: 928
From: Garden City New York
Run-flat event
Ok this past monday went to my car after not having used it sunday and my right rear pressure was 24- (Run flat all season) pressured it back up and went to work. Thinking about it all day when parked at work- was down from 32 down to 26 for my ride home- Pressured it back up to 32 awoke tuesday it was 15. Pressured it up to 35 and went to work Now I used it the last 2 days and it stays at 35??????? Looked and see no pathology to explain it though it is a pia to lie on the ground to examine the tread, move the car examine the next seg etc etc.
Also with RF i had no concern about driving to work- If non RF im sure I would have my car sitting at the dealer since monday waiting for tire rack to supply a new tire. (Though as it would be an insurance claim they may have done nothing finding no screw or nail)
Also with RF i had no concern about driving to work- If non RF im sure I would have my car sitting at the dealer since monday waiting for tire rack to supply a new tire. (Though as it would be an insurance claim they may have done nothing finding no screw or nail)
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
You cant count on visual inspection. You pretty much have to spray it down with soap water and look for the bubbles.
If you really truly have an intermittent leak, its probably the valve core in the valve stem, and often times, just putting more air in it will make it seal again.
If you really truly have an intermittent leak, its probably the valve core in the valve stem, and often times, just putting more air in it will make it seal again.
Last edited by PatternDayTrader; Feb 28, 2019 at 11:21 AM.
Melting Slicks
Joined: Jan 2013
Posts: 2,576
Likes: 237
From: Murphy NC
This would be another good reason not to use Tire Rack.
DiscountTireDirect.com would have your tire over-nighted to your nearest Discount Tire Store.
What a great company!
I had a rear Michelin giving a bad harmonic when driving. Not even an emergency and DT had a new tire next day.
DiscountTireDirect.com would have your tire over-nighted to your nearest Discount Tire Store.
What a great company!
I had a rear Michelin giving a bad harmonic when driving. Not even an emergency and DT had a new tire next day.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Whip up some soap water and splash it on the valve stem, take the valve cap off, you will know in 60 seconds if that is the problem.
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Any valve stem wrench will work. They are standard schroeder valves.
Ditto on don't muscle it tight. Just twist until you feel a firm stop. If it's loose you'll know immediately.
Ditto on don't muscle it tight. Just twist until you feel a firm stop. If it's loose you'll know immediately.
Last edited by Foosh; Mar 1, 2019 at 11:57 AM.
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Hope the solution is simply to tighten the valve stem. Otherwise, the soapy water routine should show where a leak is.
Drifting
Joined: Jun 2006
Posts: 1,388
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From: Palmer Township PA
I've had the same thing happen with a cracked wheel. It leaked for a few days and then stopped. It actually developed a second crack and still did not leak. It was very strange. The temperature was the same throughout the whole week this phenomenon happened.
Burning Brakes
Joined: Oct 2013
Posts: 1,122
Likes: 381
From: Southeastern PA
That was my guess as stated in my earlier post on this thread. Way too many GS/Z06 rims developing cracks with no discernible tie to a memorable “event”. Like you, I purchased the tire and wheel warranty. Unfortunately, will either be repaired or replaced with the same problematic OEM rims. Many folks going with forged wheels for peace of mind.
Last edited by runner61627; Mar 3, 2019 at 12:26 PM.
Burning Brakes
Joined: Mar 2010
Posts: 1,016
Likes: 250
You might also replace the valve stem core on the tire/wheel in question. I had my driver side rear tire leaking (I could hear the air seeping), and tightening it didn't do any good, but replacing the valve stem core did. You can find them at FLAPS--friendly local auto parts store. I believe they were labeled "heavy duty truck" application -- red line ones.
Never mind: saw the post about cracked rim. Doh!
Never mind: saw the post about cracked rim. Doh!
Last edited by boxster99t; Mar 3, 2019 at 12:53 PM.