RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login

Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 01-12-2019, 05:34 PM   #1
Senior Member
 
Tranquil Jim's Avatar
 
Newmar Owners Club
Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 2,533
Loose Valve Stem Cores?

Today, I decided to remove the TPMS sensors on the coach. The manufacturer (EEZTIRE) says it preserves battery life if there's no pressure on the sensor.

Anyway, when I removed the second one, the valvestem continued to hiss air. I depressed the center pin a couple of times, but it wouldn't seal. On a whim, I grabbed my valvestem tool and checked for tightness; it was 3/4 turn loose. Same thing happened with five of the eight valvestems. All cores were 1/4 to 1 full turn loose. Obviously, I tightened them all and all leaking ceased...I hope.

I'm thinking that friction between the the center pin and the sensor base to pressurize the system caused the core's to loosen when I unscrewed them. Anyone else had this experience?

I'm wondering if the cores were not fully tightened when the tires were mounted and that contributed to the problem. I spent a few years working in a tire shop when going to college and we always firmly seated the cores. I never saw one work loose on its own, but we weren't using TPMS sensors in those days either.

Thoughts?

TJ
__________________

__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047 + 2014 Honda CR-V "toad" w/AF1
Tranquil Jim is online now   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 01-12-2019, 05:49 PM   #2
Junior Member
 
Join Date: Jan 2017
Location: Spokane, WA
Posts: 15
I had same experience with outer dually both sides. Using Tire Minder sensors.
__________________

CLB2 is offline   Reply With Quote
Old 01-12-2019, 06:14 PM   #3
Senior Member
 
bob caldwell's Avatar


 
Join Date: May 2017
Location: Vancouver Wash
Posts: 4,945
Don't they recommend a little Never-Seize on the treads?
__________________
2010 Rockwood Sig Ultra lite 5er 8280......'99 Ram 2500, Cummins. 4x4.....Pullrite Superglide.......Use to work in calender factory.....got fired for tak'n a few days off.....
bob caldwell is online now   Reply With Quote
Old 01-12-2019, 06:32 PM   #4
Senior Member
 
Tranquil Jim's Avatar
 
Newmar Owners Club
Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 2,533
Quote:
Originally Posted by bob caldwell View Post
Don't they recommend a little Never-Seize on the treads?
Did that, but the problem is not that the sensor binds up on the valvestem threads, it apparently makes friction contact with the core rim where there's no anti-seize. I will try a little anti-seize on the base of the sensors when I reinstall them.

TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047 + 2014 Honda CR-V "toad" w/AF1
Tranquil Jim is online now   Reply With Quote
Old 01-12-2019, 07:13 PM   #5
Senior Member
 
Join Date: Sep 2010
Posts: 2,804
This would be either a Spartan or FL issue. Newmar gets the chassis with tires already on chassis. Which chassis do you have?
Newmar Man
tom chelbana is offline   Reply With Quote
Old 01-12-2019, 07:15 PM   #6
Senior Member
 
Jtrving's Avatar


 
Join Date: Mar 2017
Location: Powhatan, VA
Posts: 430
I had same issue Jim, on 2 of my 8 tires.
__________________
Jeff & Tracie (Stella & Hoonah - the rescue mutts)
2018 Mountain Aire 4531
2013 Jeep Wrangler Sport
Jtrving is offline   Reply With Quote
Old 01-12-2019, 07:20 PM   #7
Senior Member
 
DrPhil's Avatar
 
Join Date: Oct 2014
Posts: 830
Yup. Been there. My old coach had a valve core and a separate valve stem that were not fully seated, so when I took delivery of our DSDP, I checked them all. Found 2 out of 8 valve cores not fully tightened. Interestingly it was both of the inside duals, and this was pre-installation of my TST system. All stems were fine.
__________________
Phil and Laura (and Sam too!)
2017 DSDP 4369 on Spartan K2
2017 Unltd Rhino Rubi Recon Toad
DrPhil is offline   Reply With Quote
Old 01-12-2019, 07:23 PM   #8
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 12,427
Funny timing. Coming home from our New Years trip, my TST inside dual alarm sounded and the pressure began counting down. I was losing 3 pounds a minute. Figured I must have a big bolt in the tire. I pulled over and found nothing in the tire. I pulled the sensor, checked the pressure and it was fine. After talking to TST and then later trying the sensor on different tires, I checked the core and it was almost a full turn lose. Next time I check pressures, I guess I will hit all the cores.
__________________
Don & Mary
2019 Newmar Dutch Star 4018
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 01-12-2019, 07:26 PM   #9
Senior Member
 
Join Date: Jan 2017
Location: Little Rock, Arkansas
Posts: 1,347
We've had the EEZTire system on ours for about a year and a half without a problem. I did change the batteries a couple of weeks ago just to be safe, and the old ones still measured in the 2.85 volt range. They're 3 volt batteries, so being on them non-stop for 18 months didn't seem to run them down much. But ... then ... I don't know how low is too low. Batteries aren't that expensive or hard to replace, so I'm just planning to replace them every year or so.

FWIW, I checked the pressures on ours when we first got it, and one of the rears continued to leak pressure from the stem after I removed the pressure gauge. I tried tightening it, and that didn't help. So I removed it, and there was a very tiny shred of what appeared to be plastic stuck in the valve. I got it out, and all's been fine since.
__________________
2017 Thor A.C.E. 30.1
F53 18,000 GVWR
EdInArk is offline   Reply With Quote
Old 01-12-2019, 07:29 PM   #10
Senior Member
 
stang37's Avatar


 
Newmar Owners Club
Freightliner Owners Club
Join Date: Feb 2016
Location: Mississippi
Posts: 365
I will try a little anti-seize on the base of the sensors when I reinstall them.

TJ[/QUOTE]

Not sure I would try this. The air pressure might push anti-seize into the sensor and plugging it. My thoughts.
__________________
2016 Newmar Ventana 4002
2018 Jeep Wrangler sport
stang37 is offline   Reply With Quote
Old 01-12-2019, 07:35 PM   #11
Senior Member
 
Tranquil Jim's Avatar
 
Newmar Owners Club
Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 2,533
Quote:
Originally Posted by stang37 View Post
Not sure I would try this. The air pressure might push anti-seize into the sensor and plugging it. My thoughts.
I was wondering about that possibility. Was just thinking that a very light film might help. I'm inclined to just check the valve cores whenever I take the sensors off.

TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047 + 2014 Honda CR-V "toad" w/AF1
Tranquil Jim is online now   Reply With Quote
Old 01-12-2019, 07:46 PM   #12
Senior Member
 
Tranquil Jim's Avatar
 
Newmar Owners Club
Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 2,533
Quote:
Originally Posted by tom chelbana View Post
This would be either a Spartan or FL issue. Newmar gets the chassis with tires already on chassis. Which chassis do you have?
Newmar Man
Well, I don't know about that, Tom. It is my understanding that the bare chassis comes from the manufacturer (either Freightliner or Spartan) on steel delivery wheels. Newmar then installs the aluminum wheels at the conclusion of the build. I may be wrong, but that's what I've been told.

Don't know who mounts the tires on the aluminum rims; Newmar or a vendor? Regardless, this is not a Freightliner vs Spartan issue in my view.

Just for the record, our 2018 MADP 4047 was only available on the Spartan chassis.

TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047 + 2014 Honda CR-V "toad" w/AF1
Tranquil Jim is online now   Reply With Quote
Old 01-12-2019, 10:12 PM   #13
Senior Member
 
Join Date: Sep 2010
Posts: 2,804
We have been to the factory 14 times mostly to visit not service and Spartan factory 6 times. Every chassis either from FL or Spartan comes with the tires and wheels you get when you get your coach. We have even complained to Newmar because we had a lot of clear coat on our 18 London Aire wheels. As a big support of Spartan I think this time they should be checking by Spartan for the valve stems before Newmar gets the chassis.One small down for Spartan. Did a seminar at a FMCA rally and a Tiffin owner at FL chassis that the tires were almost 3 years old using the date code on the tires. Always like to share with owners how important date codes are on tires. For us it's 6 years and their gone. Also important when purchasing tires to check date code because that the time when for us the date starts for the 6 years.
Have had 2 tire failures in our 350K on class A travel so we know how important tires are o on our coaches. To read date codes find on one side of the tire the 4 numbers like 2114. That tire was built on the 21 week of 2014.
Newmar Man
tom chelbana is offline   Reply With Quote
Old 01-12-2019, 11:32 PM   #14
Senior Member
 
Tranquil Jim's Avatar
 
Newmar Owners Club
Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 2,533
Interesting, Tom. I just reviewed a bunch of photos of our coach in various stages of construction and they all showed it sitting on black wheels. It was delivered with polished aluminum wheels. Can you help me understand that?

TJ
__________________

__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047 + 2014 Honda CR-V "toad" w/AF1
Tranquil Jim is online now   Reply With Quote
Reply

Tags
valve



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Costco and sales tax on battery cores vsheetz iRV2.com General Discussion 9 01-09-2017 05:32 PM
Check those valve cores! MSHappyCampers Class A Motorhome Discussions 8 07-01-2012 03:16 PM
Valve cores sticking! MSHappyCampers Class A Motorhome Discussions 11 05-24-2012 01:39 PM
Loose pins in tow bar?? bruceh Toads and Motorhome Related Towing 8 02-18-2009 02:51 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:10 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.