Tire Pressure Sensor rubber grommit
Thread Starter
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Tire Pressure Sensor rubber grommit
I dropped my wheels and new Firestone Wide Oval tires off to have them mounted and the shop said the rubber grommits that seal the low tire pressure sensors to the rim where shot.
Anybody had a similar problem? Where can I get new ones? The Dealer?
Anybody had a similar problem? Where can I get new ones? The Dealer?
Melting Slicks
Joined: Aug 2007
Posts: 3,213
Likes: 397
From: Indianapolis IN
Common problem, always good to have a few extra, but not sure who carries them, I would like too know as well
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
If they aren't tight enough you can have problems, but probably most of the problems are from them being torqued down too tight.
I took a look in your profile and see you HRE wheels. I imagine that who ever mounted your tires/sensors on those wheels over-torqued the crap out of your sensor retaining nuts and squashed the grommets.
The nuts have a very low torque spec of 62 inch-lbs (that's only about 5 ft-lbs).
Most every tire shop should have grommets and nickel plated valve stem cores for sensors on all makes/models of vehicles. ALL vehicles less than 10,000 lbs must have a TPMS and sensors beginning with the 2008 model year, so all tire shops should be able to properly take care of sensors.
The party line from the sensor manufacturers and the tire mounting lobby is that you should put on new grommets every time you remount a sensor, therefore your tire shop should have grommets. However, if sensors were mounted properly and the nuts installed/torqued properly they shouldn't be damaged when installed. If your tire shop doesn't have grommets you can get them at the dealer. It sounds like your shop may not know how to work with sensors.
Bob
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
Here's what I believe is the grommet for our sensors. Make sure you check it out with your parts department if you go to a dealer to get them.
This is from forum vendor Gene Culley's site at http://gmpartshouse.com and shows the discount price from him:
GM Part Number: 25754190
Tire pressure monitor components - Tire sensor - Grommet
MSRP: $3.42 your price: $2.61
These things look like they should cost about 1 cent each, but there seems to be huge GM tax!
Most all full service tire shops should have kits with parts to service sensors made by all the various manufacturers.
Bob
This is from forum vendor Gene Culley's site at http://gmpartshouse.com and shows the discount price from him:
GM Part Number: 25754190
Tire pressure monitor components - Tire sensor - Grommet
MSRP: $3.42 your price: $2.61
These things look like they should cost about 1 cent each, but there seems to be huge GM tax!
Most all full service tire shops should have kits with parts to service sensors made by all the various manufacturers.
Bob
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
Bob
.
Thread Starter
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Thanks to all.
The guy who torqued them down is me. One was leaking, so I tightened them all. The one which leaker was very sensitive to how tight. Just a small change and it leaked. I am not sure, but area where the grommet is seated on the HRE wheel may be part of the problem. I will get them on Monday.
The guy who torqued them down is me. One was leaking, so I tightened them all. The one which leaker was very sensitive to how tight. Just a small change and it leaked. I am not sure, but area where the grommet is seated on the HRE wheel may be part of the problem. I will get them on Monday.
Burning Brakes
Joined: Aug 2007
Posts: 950
Likes: 3
From: Chesapeake Virginia
John
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Race Director
Joined: Jan 2005
Posts: 10,924
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From: Daytona Beach FL
I am having a problem with my right front on my 05 C6. Brand new tire inflated to 30psi cold. Once I get about 5 miles from home the right front starts losing pressure and continues until the tire reaches full operating temperature. It is dropping from 30 psi to 17 psi in about 6 miles or so and then it stabilizes. I thought it might be a defective tire so it was replaced by tire rack at no charge. Got the new tire on and all seemed well until yesterday, same scenario. I even took soapy water with me this morning to test the valve, core and outer bead right when it starts losing pressure. Got on interstate and just like clockwork tire started losing air then I pulled over. Sprayed entire bead area and stem, no bubbles anywhere. I continued on and lost 2 more psi before I got home. I am thinking it may be a TMPS or grommit issue. What do you think.
John
John
The sensor is very light weight, but I guess at highway speeds there is probably enough centrifugal force pulling on the sensor to perhaps pull on it or twist it enough to deform the grommet and allow it to leak.
I can't imagine it, but could there possibly be a crack in the wheel somewhere? I suppose if you've checked everything else you might have to break the bead on the tire to get in there and take out the sensor to inspect/replace the grommet.
Bob
Melting Slicks
Joined: Nov 2004
Posts: 3,064
Likes: 6
From: Pinellas Park Florida
Any tire repair facility will have rebuild kits for the sensors. These rebuild kits include the rubber O-ring, valve core, valve cap, and the stem nut-for a grand total of $6 for the kit
I they don't have or even know about then maybe you should find another place to do the work
I they don't have or even know about then maybe you should find another place to do the work
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
Any tire repair facility will have rebuild kits for the sensors. These rebuild kits include the rubber O-ring, valve core, valve cap, and the stem nut-for a grand total of $6 for the kit I they don't have or even know about then maybe you should find another place to do the work
I they don't have or even know about then maybe you should find another place to do the work
Here's a link to a Schrader webpage:
http://schrader-bridgeport.com/broch...ation_id=11400
Schrader makes our sensors, and you can see they supply the kits AutoCutter is talking about.
I agree that if they don't have this stuff available then they may not be very knowledgeable or up to date on tire sensors and TPMS.
Bob
