Tire bead and TPMs questions - ZR-1 Net Registry Forums

conesare2seconds · 11-12-2017

Hi everyone. One of my (very new) rear tires has a slow leak. There was no obvious damage so I hit it with soapy water and turned up multiple leaks at the bead on the back side of the wheel. Is there a chance it’s anything other than a bead that got fudged up when the tire was installed?

Also, the tire was installed just before the Gathering and apparently didn’t start leaking until recently. What’s up with that?

Finally, the TPMS indicator never lit up. It illuminates when the key is turned to the run position,however, so no one pulled the bulb or taped over the lens. I wasn’t aware of a bypass procedure - any thoughts on why it didn’t alert me to the leaky tire?

GOLDCYLON · 11-12-2017

Quote:

Originally Posted by conesare2seconds

Hi everyone. One of my (very new) rear tires has a slow leak. There was no obvious damage so I hit it with soapy water and turned up multiple leaks at the bead on the back side of the wheel. Is there a chance it’s anything other than a bead that got fudged up when the tire was installed?

Also, the tire was installed just before the Gathering and apparently didn’t start leaking until recently. What’s up with that?

Finally, the TPMS indicator never lit up. It illuminates when the key is turned to the run position,however, so no one pulled the bulb or taped over the lens. I wasn’t aware of a bypass procedure - any thoughts on why it didn’t alert me to the leaky tire?

There is no bypass procedure for the 94. So with the bulb being present and no tape over the light it should be an operating system. Depending upon how many pounds were left is won't illuminate until you move the car once the wheel sensors is energized it reports back a condition as the piszo battery's in the bands are charged. I would get the tire remounted as the bead might not have been sealed correctly or some debries were caught in the process preventing a seal. These would be my thoughts.

conesare2seconds · 11-20-2017

Took the wheel & tire into work today (a national auto parts and repair outfit) where one of the techs cleaned some oxidation off the rim, applied a little bead sealer and verified the seal was airtight via a water trough. He said the cold weather probably backed the bead off just a smidge as the temps dropped and it isn’t an uncommon occurrence.

Strangely, he advised there was no TPMs sensor present. Not sure how I’m not getting a fault light if that’s the case. Anyhow, on to the next projects.

GOLDCYLON · 11-21-2017

When you get the light in the DIC in the prestart sequence before you turn the key which light illuminates? Low tire pressure ? or LTPWS ?

WVZR-1 · 11-21-2017

Quote:

Originally Posted by conesare2seconds

Strangely, he advised there was no TPMs sensor present. Not sure how I’m not getting a fault light if that’s the case. Anyhow, on to the next projects.

I'd guess he was expecting the later style TPMS - you should get BOTH lamps when the BULB CHECK is done.

Ask the tech if he realized the TPMS is band mounted. I would have expected that he only released the bead from the seat sufficiently to clean and lube.

DRM500RUBYZR-1 · 11-21-2017

Quote:

Originally Posted by conesare2seconds

Took the wheel & tire into work today (a national auto parts and repair outfit) where one of the techs cleaned some oxidation off the rim, applied a little bead sealer and verified the seal was airtight via a water trough. He said the cold weather probably backed the bead off just a smidge as the temps dropped and it isn’t an uncommon occurrence.

Strangely, he advised there was no TPMs sensor present. Not sure how I’m not getting a fault light if that’s the case. Anyhow, on to the next projects.

Oxidation of the aluminum alloy wheel on a 25+ year ZR-1 is almost always a certainty!
Your tire tech did exactly the right thing!
Glad it worked out for you!
Marty

DRM500RUBYZR-1 · 11-21-2017

Quote:

Originally Posted by WVZR-1

I'd guess he was expecting the later style TPMS - you should get BOTH lamps when the BULB CHECK is done.

Ask the tech if he realized the TPMS is band mounted. I would have expected that he only released the bead from the seat sufficiently to clean and lube.

I would bet your answer is 100% spot on correct!!!
That sensor is there based on his description of what he sees!
Many younger tire techs have rarely seen the band mounted TPMS, as 99.9% are all mounted on the valve stem now.
Marty

GOLDCYLON · 11-21-2017

Quote:

Originally Posted by DRM500RUBYZR-1

I would bet your answer is 100% spot on correct!!!
That sensor is there based on his description of what he sees!
Many younger tire techs have rarely seen the band mounted TPMS, as 99.9% are all mounted on the valve stem now.
Marty

Good discussion Marty. having just replaced tires again on my 91 I'm know at Discount Tire as the guy who brings in complete demonstration tire band to show all the techs what 80's tech looks like. This has been a successful formula and the manager tends to use it as a training opportunity for all the 20 somethings.

BlackZR1 · 11-21-2017

On a related note, when I recently bought a set of tires, I brought this diagram from the FSM to make sure they knew how to avoid damaging my sensors.

conesare2seconds · 11-22-2017

I only get the Low Tire Pressure lamp, I think. Checked it this morning, the lights only display for a second or so and I was having trouble reading them all, even with a few key cycles. Will consult the FSM, locate the position of the indicators, then recheck.

11-12-2017	#1
conesare2seconds Join Date: Jul 2016 Location: Greater St. Louis Posts: 484	Tire bead and TPMs questions Hi everyone. One of my (very new) rear tires has a slow leak. There was no obvious damage so I hit it with soapy water and turned up multiple leaks at the bead on the back side of the wheel. Is there a chance it’s anything other than a bead that got fudged up when the tire was installed? Also, the tire was installed just before the Gathering and apparently didn’t start leaking until recently. What’s up with that? Finally, the TPMS indicator never lit up. It illuminates when the key is turned to the run position,however, so no one pulled the bulb or taped over the lens. I wasn’t aware of a bypass procedure - any thoughts on why it didn’t alert me to the leaky tire?

11-20-2017	#3
conesare2seconds Join Date: Jul 2016 Location: Greater St. Louis Posts: 484	Re: Tire bead and TPMs questions Took the wheel & tire into work today (a national auto parts and repair outfit) where one of the techs cleaned some oxidation off the rim, applied a little bead sealer and verified the seal was airtight via a water trough. He said the cold weather probably backed the bead off just a smidge as the temps dropped and it isn’t an uncommon occurrence. Strangely, he advised there was no TPMs sensor present. Not sure how I’m not getting a fault light if that’s the case. Anyhow, on to the next projects.

11-21-2017	#4
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,154	Re: Tire bead and TPMs questions When you get the light in the DIC in the prestart sequence before you turn the key which light illuminates? Low tire pressure ? or LTPWS ? __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

11-22-2017	#10
conesare2seconds Join Date: Jul 2016 Location: Greater St. Louis Posts: 484	Re: Tire bead and TPMs questions I only get the Low Tire Pressure lamp, I think. Checked it this morning, the lights only display for a second or so and I was having trouble reading them all, even with a few key cycles. Will consult the FSM, locate the position of the indicators, then recheck.