Left rear tyre loses pressure

Arnold · 06-05-2012, 04:30 PM

Hi,

I bought a second hand (showroom car) 370Z last December. I haven't used it a lot until March (in Belgium here, stupid weather...) but now I used almost daily and I'm worried about the rear left tyre.

It seems to lose its pressure quite quickly. When I didn't use the car for 2 months I was able to see it was kind of flat (still 1kPA left roughly) but after that time I can understand it.
However when I put pressure in it to the regular 2.4kPA it seems it goes down quickly to 2kPA, after a week or less. Whether I drive it or not.

Do you think this is a big issue? Shall I go to a Nissan dealer to check that out? I just fear the usual sales guy answer: "oh yes your tyre is dead let's replace all 4 of them". The car has only 14K km, I did about 2500.
Thanks!

Cmike2780 · 06-05-2012, 04:38 PM

It's probably a leak somewhere. Might be a pucture or might be a bad seal. If you don't have a pucture close to the sidewall, they can probably fix it. Have it checked. You shouldn't have to replace the other tires if the threads are still good.

Arnold · 06-05-2012, 04:41 PM

Thanks. I guess I knew the answer but wanted to be sure ;-)
Thing is, I'm racing at le Mans (amateur) on 7th July. Don't know if I'll have the time to check the tyre by then.
Do you think I can inflate the tyre just before the race and still have fun?
Thanks!

m4a1mustang · 06-05-2012, 04:42 PM

Quote:

Originally Posted by Arnold

Thanks. I guess I knew the answer but wanted to be sure ;-)
Thing is, I'm racing at le Mans (amateur) on 7th July. Don't know if I'll have the time to check the tyre by then.
Do you think I can inflate the tyre just before the race and still have fun?
Thanks!

That's dangerous.

Make the time to check the tire for a puncture before you take it out on track.

phohman · 06-05-2012, 04:45 PM

Although it is best w the tire off, get a spray bottle w water and a couple of drops of dishsoap. Air up the tire to capacity and sray the tire w mixture until U see bubbles. That would be the leaking area!

Arnold · 06-05-2012, 04:51 PM

Thanks guys and @phohman
I actually have the "run flat thingy" in my trunk, I shall maybe use it and see what's the result.
For whatever reason the company I'm used to go for tyres problems have a huuuge waiting list

Cmike2780 · 06-05-2012, 04:54 PM

Get it checked. I would take caution driving it on the road, let alone on a track at high speeds. If you haven't intalled one already, I would also look into installing an oil cooler and upgrading the brake pads if I were you.... and fill up your tank all the way.

Arnold · 06-05-2012, 05:22 PM

Thanks man! Oil cooler is on the way, tank all the way will definitely be. I didn't really think about changing brake pads yet to be honest :/

370Z Purist · 06-06-2012, 11:29 AM

Coincidentally, I also had driver's rear (LHD) tire pressure loss. Turned out to be two scaffolding nails (

). Paid a local tire shop to seal them up. No leaks since.

kenchan · 06-06-2012, 11:53 AM

op- you shouldn't loose air. have the tire checked. it could be a puncture, a bad bead, bad valve stem.

fuct · 06-06-2012, 12:39 PM

i had the same issue. roofing nail.... get it checked. discount tire does a good and cheap job patching tires.

Waiz · 06-06-2012, 08:29 PM

Quote:

Originally Posted by Arnold

Thanks. I guess I knew the answer but wanted to be sure ;-)
Thing is, I'm racing at le Mans (amateur) on 7th July. Don't know if I'll have the time to check the tyre by then.
Do you think I can inflate the tyre just before the race and still have fun?
Thanks!

That is beyond dangerous OP

I would suggest getting that addressed ASAP and if you can't get it checked you should not be running at high speeds

370Z Purist · 06-06-2012, 09:04 PM

Quote:

Originally Posted by fuct

i had the same issue. roofing nail.... get it checked. discount tire does a good and cheap job patching tires.

He mentioned he's in Belgium, I don't think many of the replies were considered with that in mind.

Overall, yes, going high speeds and subjecting your tires to lots of shear forces will probably mean that the tire might and most likely will:

completely depressurize and be damaged to the point it must be replaced
fail catastrophically at high speed, either flying off the wheel or tearing into pieces
roll right off the wheel during a hard turn
deflate too much and be damaged before the race, causing you to replace it anyway

Either way, it will most definitely ruin your race weekend, and possibly endanger your life.

Get it looked at and fixed!

Then you can drive all you want without damaging the tire, wheel, suspension, car, or yourself. If you crash, nothing said here applies.

06-05-2012, 04:30 PM	#1 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 14	Left rear tyre loses pressure Hi, I bought a second hand (showroom car) 370Z last December. I haven't used it a lot until March (in Belgium here, stupid weather...) but now I used almost daily and I'm worried about the rear left tyre. It seems to lose its pressure quite quickly. When I didn't use the car for 2 months I was able to see it was kind of flat (still 1kPA left roughly) but after that time I can understand it. However when I put pressure in it to the regular 2.4kPA it seems it goes down quickly to 2kPA, after a week or less. Whether I drive it or not. Do you think this is a big issue? Shall I go to a Nissan dealer to check that out? I just fear the usual sales guy answer: "oh yes your tyre is dead let's replace all 4 of them". The car has only 14K km, I did about 2500. Thanks!

06-05-2012, 04:38 PM	#2 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	It's probably a leak somewhere. Might be a pucture or might be a bad seal. If you don't have a pucture close to the sidewall, they can probably fix it. Have it checked. You shouldn't have to replace the other tires if the threads are still good. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

06-05-2012, 04:54 PM	#7 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	Get it checked. I would take caution driving it on the road, let alone on a track at high speeds. If you haven't intalled one already, I would also look into installing an oil cooler and upgrading the brake pads if I were you.... and fill up your tank all the way. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

06-06-2012, 11:29 AM	#9 (permalink)
370Z Purist A True Z Fanatic Join Date: Jun 2009 Location: Zion, Illinois Posts: 1,873 Drives: '09 370Z-T BS M6 Rep Power: 19	Coincidentally, I also had driver's rear (LHD) tire pressure loss. Turned out to be two scaffolding nails (). Paid a local tire shop to seal them up. No leaks since. __________________ -Phil "Since one of my brake light bulbs just went out, the forum told me that my piston rings are about to blow."

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06-05-2012, 04:41 PM	#3 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 14	Thanks. I guess I knew the answer but wanted to be sure ;-) Thing is, I'm racing at le Mans (amateur) on 7th July. Don't know if I'll have the time to check the tyre by then. Do you think I can inflate the tyre just before the race and still have fun? Thanks!

06-05-2012, 04:45 PM	#5 (permalink)
phohman Base Member Join Date: Feb 2011 Location: Katy-Houston Tx. Age: 62 Posts: 124 Drives: 2012 370Z Nismo Rep Power: 14	Although it is best w the tire off, get a spray bottle w water and a couple of drops of dishsoap. Air up the tire to capacity and sray the tire w mixture until U see bubbles. That would be the leaking area!

06-05-2012, 04:51 PM	#6 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 14	Thanks guys and @phohman I actually have the "run flat thingy" in my trunk, I shall maybe use it and see what's the result. For whatever reason the company I'm used to go for tyres problems have a huuuge waiting list

06-05-2012, 05:22 PM	#8 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 14	Thanks man! Oil cooler is on the way, tank all the way will definitely be. I didn't really think about changing brake pads yet to be honest :/

06-06-2012, 11:53 AM	#10 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	op- you shouldn't loose air. have the tire checked. it could be a puncture, a bad bead, bad valve stem.

06-06-2012, 12:39 PM	#11 (permalink)
fuct A True Z Fanatic Join Date: May 2009 Location: Sugar Land Posts: 3,692 Drives: 97' Ranger :) Rep Power: 24	i had the same issue. roofing nail.... get it checked. discount tire does a good and cheap job patching tires.