|
11-23-2019, 06:04 PM
|
#1
|
Senior Member
Join Date: May 2018
Location: Mechanicsville
Posts: 478
|
TPMS Cap Sensors
After a year and roughly 5k miles I noticed the cap sensors wearing into the rim from centrifugal force. I think they spin and the little screw bosses contact the rim as they spin.
One wheel I have been adding air too recently. I brought it down to the shop and they found the valve stem leaking. The centrifugal force with the sensor caps is flexing the stems.
I ended up replacing all 4 just to be safe. I also stuck some pieces of foam on the rim in back of the stems to help support them from flexing....pictures.
I didn't find anyone locally with solid metal stems that would fit in the recess of the rim. I did see some on ebay I think will work. I will replace the present ones, but will use them for now.
If you have cap sensors, you might want to check for this. Hope the pictures post.
|
|
|
11-23-2019, 06:10 PM
|
#2
|
Senior Member
Join Date: Jan 2014
Location: Winnipeg, Canada
Posts: 1,196
|
Quote:
Originally Posted by fjr vfr
After a year and roughly 5k miles I noticed the cap sensors wearing into the rim from centrifugal force. I think they spin and the little screw bosses contact the rim as they spin.
One wheel I have been adding air too recently. I brought it down to the shop and they found the valve stem leaking. The centrifugal force with the sensor caps is flexing the stems.
I ended up replacing all 4 just to be safe. I also stuck some pieces of foam on the rim in back of the stems to help support them from flexing....pictures.
I didn't find anyone locally with solid metal stems that would fit in the recess of the rim. I did see some on ebay I think will work. I will replace the present ones, but will use them for now.
If you have cap sensors, you might want to check for this. Hope the pictures post.
|
You will want to order yourself Haltec N-1600 metal valve stems. They are used by Ford, but because of their design they fit your aluminum trailer wheels. I also like their design because they control the amount of compression of the seal when installed and clamp metal to metal on both sides of the wheel so they are rigid. May as well balance the wheels while at it if you have not done so already.
Here is a source: https://yourtireshopsupply.com/produ...-valve-han1600
BTW, I throw away the cap and install regular caps.
__________________
2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
|
|
|
11-23-2019, 06:28 PM
|
#3
|
Senior Member
Join Date: May 2018
Location: Mechanicsville
Posts: 478
|
Thanks for the link. They look similar to the ones I found on ebay, but maybe a little better. I don't have time to order anything right now. We leave next week for our long snowbird trip. New tires coming in the summer.
I assume you have wheels like mine? I do like running the sensors.
Thanks again,
John
|
|
|
11-24-2019, 05:14 PM
|
#4
|
Senior Member
Join Date: Sep 2017
Location: Qualicum Beach
Posts: 555
|
Quote:
Originally Posted by fjr vfr
After a year and roughly 5k miles I noticed the cap sensors wearing into the rim from centrifugal force. I think they spin and the little screw bosses contact the rim as they spin.
One wheel I have been adding air too recently. I brought it down to the shop and they found the valve stem leaking. The centrifugal force with the sensor caps is flexing the stems.
I ended up replacing all 4 just to be safe. I also stuck some pieces of foam on the rim in back of the stems to help support them from flexing....pictures.
I didn't find anyone locally with solid metal stems that would fit in the recess of the rim. I did see some on ebay I think will work. I will replace the present ones, but will use them for now.
If you have cap sensors, you might want to check for this. Hope the pictures post.
|
I don't know what brand of TPMS you are using, but mine say specifically NO rubber valve stems, only SS or brass. I have a dually so the inners are about 4" long but I use a special extension that is some kind of composite I think. I have 25K miles and no marks on the aluminum rims. Just go to a tire shop and have them swap the rubber stems for SS or brass. My truck and RV came with SS but I changed the backwards pointing Ford stems and got new at my tire shop. They even custom bent them to make it easier to get the air chuck on them.
|
|
|
11-24-2019, 06:24 PM
|
#5
|
Senior Member
Join Date: Jul 2014
Location: Solomons
Posts: 3,874
|
You can usually find steel valve stems at a NAPA auto parts store.
__________________
Tom
2019 Alpine 3651RL
2016 F350 CC DRW
|
|
|
11-25-2019, 09:18 AM
|
#6
|
Senior Member
Join Date: Oct 2018
Location: Sacramento
Posts: 1,005
|
I took my trailer to a local Les Schwab tire center and they replaced the rubber valve stems with metal. They did the same on my truck, with the inner dually needing an extra long (8 or 10 inch) stem. The whole process took about an hour, give or take.
You don't want to be running TPMS sensors on rubber valve stems.
__________________
2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
|
|
|
11-25-2019, 04:59 PM
|
#7
|
Senior Member
Join Date: May 2018
Location: Mechanicsville
Posts: 478
|
My valve stems are solid brass core rated for 80 psi. They are rubber were they seat into the rim. I found many metal screw down valve stems, but when I asked around, no one I talked to had metal screw down stems that would fit into the recess of my rims.
I have since found several online that should work. In the long term I will most likely go with the Haltec N-1600 metal valve stems that slow suggested.
I'm sure they will work fine and the price is good.
I'm confident the new stems and extra padding under them will get me by until I can get them changed.
Thanks
|
|
|
11-25-2019, 06:52 PM
|
#8
|
Senior Member
Join Date: Jan 2014
Location: Winnipeg, Canada
Posts: 1,196
|
Quote:
Originally Posted by fjr vfr
.......I assume you have wheels like mine? I do like running the sensors.......
|
I believe so:
__________________
2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
|
|
|
11-25-2019, 08:14 PM
|
#9
|
Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,910
|
There is always the internal sensor system that can be used and this will take the valve stems out of the equation.
https://tsttruck.com/507-series-4-in...or-system.html
__________________
Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
|
|
|
11-26-2019, 06:39 PM
|
#10
|
Senior Member
Join Date: May 2018
Location: Mechanicsville
Posts: 478
|
Quote:
Originally Posted by bobbecky
|
I know, but $320 for 4 and when the battery dies it's non replaceable, so you have to buy new ones for $79 each.
Thanks, but the solid metal valve stems are $2.86 each and they never need replacing once I get them installed. And I already have sensors.
Maybe would have been an option if starting from scratch.
I'm going with what slow has when I can get to it. Thanks
|
|
|
12-01-2019, 09:35 AM
|
#11
|
Senior Member
Join Date: Sep 2018
Location: Akron
Posts: 459
|
Quote:
Originally Posted by fjr vfr
After a year and roughly 5k miles I noticed the cap sensors wearing into the rim from centrifugal force. I think they spin and the little screw bosses contact the rim as they spin.
One wheel I have been adding air too recently. I brought it down to the shop and they found the valve stem leaking. The centrifugal force with the sensor caps is flexing the stems.
I ended up replacing all 4 just to be safe. I also stuck some pieces of foam on the rim in back of the stems to help support them from flexing....pictures.
I didn't find anyone locally with solid metal stems that would fit in the recess of the rim. I did see some on ebay I think will work. I will replace the present ones, but will use them for now.
If you have cap sensors, you might want to check for this. Hope the pictures post.
|
Yes the key is to minimize the flex of the rubber stem as this can fail the stem and while the TMPS may provide a warning you will probably be on the road and the only "fix" is to put on a spare.
__________________
Retired Tire Design Engineer (40 years). Serve on FMCA Tech Advisory Committee. Write a blog RV Tire Safety. Read THIS post on Why Tires Fail.
|
|
|
12-01-2019, 12:31 PM
|
#12
|
Junior Member
Join Date: Sep 2017
Location: Jeffersonville
Posts: 6
|
Caution with Steel Valve Stems
Quote:
Originally Posted by slow
You will want to order yourself Haltec N-1600 metal valve stems. They are used by Ford, but because of their design they fit your aluminum trailer wheels. I also like their design because they control the amount of compression of the seal when installed and clamp metal to metal on both sides of the wheel so they are rigid. May as well balance the wheels while at it if you have not done so already.
Here is a source: https://yourtireshopsupply.com/produ...-valve-han1600
BTW, I throw away the cap and install regular caps.
|
On my 2017 F350, 4 of 6 tires started to leak within the first year. Turned out that the steel valve stems were reacting with the aluminum rims causing corrosion. The two steel inner rims were fine. I ended up replacing all of mine with high pressure rubber stems on the truck. I do have metal valve stems on my trailer with a similar TPMS with no problems. I don’t know what they are made of since they are OEM.
|
|
|
12-01-2019, 12:56 PM
|
#13
|
Senior Member
Join Date: Sep 2017
Location: Qualicum Beach
Posts: 555
|
Quote:
Originally Posted by Wally Dad
On my 2017 F350, 4 of 6 tires started to leak within the first year. Turned out that the steel valve stems were reacting with the aluminum rims causing corrosion. The two steel inner rims were fine. I ended up replacing all of mine with high pressure rubber stems on the truck. I do have metal valve stems on my trailer with a similar TPMS with no problems. I don’t know what they are made of since they are OEM.
|
Obviously steel and aluminum can't be mixed (galvanic reaction), that's why I use brass as documented by my TPMS documentation.
|
|
|
12-01-2019, 02:22 PM
|
#14
|
Senior Member
Join Date: Jan 2014
Location: Winnipeg, Canada
Posts: 1,196
|
Quote:
Originally Posted by Wally Dad
On my 2017 F350, 4 of 6 tires started to leak within the first year. Turned out that the steel valve stems were reacting with the aluminum rims causing corrosion. The two steel inner rims were fine. I ended up replacing all of mine with high pressure rubber stems on the truck. I do have metal valve stems on my trailer with a similar TPMS with no problems. I don’t know what they are made of since they are OEM.
|
Wally, were the valve stems on your aluminum wheels the Haltec N-1600 or another steel valve stem? Also, were the counterbores in the aluminum wheels painted like my wheels are?
__________________
2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
|
|
|
12-01-2019, 02:25 PM
|
#15
|
Senior Member
Join Date: Jan 2014
Location: Winnipeg, Canada
Posts: 1,196
|
Quote:
Originally Posted by sonofcy
Obviously steel and aluminum can't be mixed (galvanic reaction), that's why I use brass as documented by my TPMS documentation.
|
Brass is an even greater corrosion risk with aluminum or steel wheels:
Or were you referring to high pressure rubber stems with brass internals?
__________________
2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
|
|
|
12-01-2019, 03:07 PM
|
#16
|
Senior Member
Join Date: Sep 2018
Location: Akron
Posts: 459
|
Quote:
Originally Posted by Wally Dad
On my 2017 F350, 4 of 6 tires started to leak within the first year. Turned out that the steel valve stems were reacting with the aluminum rims causing corrosion. The two steel inner rims were fine. I ended up replacing all of mine with high pressure rubber stems on the truck. I do have metal valve stems on my trailer with a similar TPMS with no problems. I don’t know what they are made of since they are OEM.
|
While there may be some Steel stems most good stems are nickle plated brass which plays nice with Aluminum. That's why when OE TPMS first appeared (Aluminum body) the valve core changed from brass to silver color (nickle plated)
Even the "High Pressure" rubber stems can flex so keep an eye out.
__________________
Retired Tire Design Engineer (40 years). Serve on FMCA Tech Advisory Committee. Write a blog RV Tire Safety. Read THIS post on Why Tires Fail.
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|