On- the- bike TPS sensor change

[MCP]

Thanks for the help.

I don't see signs of damage, but air is pouring out when the cap is off. I'll look for a tool and go that route first.

[AmphibSailor]

Sounds like the valve core is out or loose.

[gPink]

Thanks for the help.

I don't see signs of damage, but air is pouring out when the cap is off. I'll look for a tool and go that route first.

If you have to replace the core valve cores come in different lengths.

[MCP]

Replaced the core and that seemed to solve the leak - no sign of a leak - until this morning and the tire was flat again.

I'll remove the core and try again. I was told not to over tighten the core when its replaced so maybe I need to snug it a bit more.

Thanks

[konehead]

....man I love the cog forum....  used the C clamp method for replacing the tpms batteries.  Worked like a charm.  Bought the pre tabbed batteries from digi something, bent the tabs to slide right into the whole vacated by the old battery, and soldered them up, eezy peezy..

 Word of caution tho, pay attention to the orientation of the tpms when u reinstall it.  It is direction specific and wont work if put in 180 degrees off.  Dont ask how I know, but it was very satisfying doing the rear tire twice, and hearing the bead snap back on the rim. 

[fartymarty]

Word of caution tho, pay attention to the orientation of the tpms when u reinstall it.  It is direction specific and wont work if put in 180 degrees off. 

That hasn't been the case with mine. ...nor does the Service Manual think it's important.

Install the sensor position parallel to the rim line in either direction.

[Roach]

Yup....this thread is a bit older, however I had to put in my two cents!!! 
Did this last weekend....with the BIG clamps, just like Brian said. 
No problems WHATSOEVER!!!!  It is VERY doable for ANYONE with a slightly mechanical noodle and a bit of patience. 
My ONLY nerve-racking moment was getting the tire BACK over the sensor upon install.  I had new tires put on early this year and the TPMS' were removed as they were completely dead.  So, when I did this last weekend I was REMOVING the metal valve stems and INSTALLING the newly Digikey battery-ized TPMS sensors. 
Once I spun the wheel and made EXTRA sure the opposing side of the tire bead was loose and INSIDE the wheel well, the tire slipped right over the sensor like it was covered in buttah!!!
For some reason, the front was even EASIER!!! 
My buddy bought a new-to-him 2014 and he JUST saw the Low Batt warning last week.  I copied and pasted the links for this job as well as Fred Harmon's Digikey battery replacement. 
Big Thanks to EVERYONE who is willing to offer information, tips and advice to those of us who appreciate it!!!!

[4Bikes]

I did the rear one time this way since the battery got low in between tire changes.  It does work, and I remember I had the exact clamps shown in Brian's helpful photos.