New Z Owners - Check your tire pressure

Fun42 · 03-08-2009, 01:56 PM

Hi All,

I took delivery of my new Z on Feb 12th. Today, I checked my tire pressure for the first time (while car was cold) and found it was ~45 psig on all four tires when the recommended pressure is 35 psig (sticker inside driver's door)!! I was surprised, so I checked again with a different guage - same results. The car has been driving fine and did not really notice or suspect a problem with tire pressure. I do notice some difference now in feel and ride quality now that dropped it to 35 psig.

Maybe, it is just a one time thing, but I wanted to bring this to everyone's attention in case others have same issue. Suggest you check the pressure of your tires.

Happy Z driving...

AK370Z · 03-08-2009, 01:58 PM

Quote:

Originally Posted by Fun42

Hi All,

I took delivery of my new Z on Feb 12th. Today, I checked my tire pressure for the first time (while car was cold) and found it was ~45 psig on all four tires when the recommended pressure is 35 psig (sticker inside driver's door)!! I was surprised, so I checked again with a different guage - same results. The car has been driving fine and did not really notice or suspect a problem with tire pressure. I do notice some difference now in feel and ride quality now that dropped it to 35 psig.

Maybe, it is just a one time thing, but I wanted to bring this to everyone's attention in case others have same issue. Suggest you check the pressure of your tires.

Happy Z driving...

I was thinking about the same thing. I will check the pressure now. Thanks for sharing.

Anatoray · 03-08-2009, 02:08 PM

I had the same problem. At first, I thought it was just because it was cold, but now that it's in the 70s, and tire pressure alarm light was still up, so I went and checked it.

SoCal 370Z · 03-08-2009, 02:13 PM

Same here—all four tires at about 47psi; spare tire was at about 50psi (10psi under). I checked them all the first day we had it.

ArtVandaleigh · 03-08-2009, 04:42 PM

Funny you mentioned this, as i checked my tires right when i got home from the dealer and all of them were around 45psi too. I'm not sure on Nissan's logic with this as they most certainly know the recommended PSI.

MC · 03-08-2009, 04:52 PM

tires are usually over inflated during overseas shipping to help reduce the cars moving while on the boats

AK370Z · 03-08-2009, 05:51 PM

Quick question, How do I know if my tires were filled with air or Nitrogen? If they were Nitrogen, do I HAVE to put nitrogen? I have no clue where the nearest Nitrogen fill up center.

MC · 03-08-2009, 05:56 PM

kinda hard to tell....do you have green or blue valve caps thats usually a giveaway. also if you have nitrogen your pressure shouldnt go up more than maybe 2psi under normal driving. where air would go up a bit more

no you dont have to have it

tvfreakazoid · 03-08-2009, 08:27 PM

I hear its really expensive to have it filled with nitrogen. It's like 30 bucks per tire. That is crazy.
A local dealership in my area (sactown/Elk grove) has a nitro filling station. I wonder how much they would charge.

Anatoray · 03-08-2009, 10:07 PM

Nitrogen is just a bonus gas you can put into tires that lasts longer and can give better performance due to being lighter.

Most dealerships these days have nitrogen fill stations, and have some kind of plan if you buy a new car from them. I know that the dealership that I got my Z from has some deal where they give you a free nitrogen fill up each year if you purchase the Z or a set of OEM tires from them.

import111 · 03-08-2009, 10:12 PM

All my tires were at 36psi

FricFrac · 03-09-2009, 03:55 AM

Isn't air 78% Nitrogen anyhow? Does it actually make that much difference?

Crash · 03-09-2009, 05:14 AM

^^^ Correct. There's no reason to fill your tires with NO2. It's really pointless... Don't pay for it. That's like filling your tires with Helium. (Stupid and wasteful)

However, depending on if you got the sport package, the tires may be rated for 45PSI for normal driving (tread ware). Most vehicle manuals will say 35PSI to be on the safe side (as most tires are rated at 35PSI), but newer tires these days are rated much higher for daily use. For track days, it's good to air them down to about 30PSI. They're perfectly safe (and definitely going to have more life) at 45PSI if you're not tracking the car.

MC · 03-09-2009, 05:20 AM

i will give you guys one proven advantage to nitrogen i can vouch for.

under hard driving the tire pressure stays very consistant even when the tires get EXTREMELY heated. my tires are about 29PSI cold and after beating on them at autoX or a track they are only up to maybe 32 or maybe 34 in the front under really hard driving.

with air your talking alot greater fluctuations in PSI with air i would be atleast 4-5 PSI higher

FricFrac · 03-09-2009, 11:34 AM

Quote:

Originally Posted by Crash

^^^ Correct. There's no reason to fill your tires with NO2. It's really pointless... Don't pay for it. That's like filling your tires with Helium. (Stupid and wasteful)......

LOL - maybe Nitrous (N2O) would be good for performance

I think you meant N2

MC - good point. In racing having more precise control over your tire presure is very important. I know a lot of the Sprint car guys use bleed off valves to keep the presure consistant as the tire heats up...

03-08-2009, 01:56 PM	#1 (permalink)
Fun42 Base Member Join Date: Dec 2008 Location: Houston, TX Posts: 32 Drives: 370 Z Sports Pkg Rep Power: 17	New Z Owners - Check your tire pressure Hi All, I took delivery of my new Z on Feb 12th. Today, I checked my tire pressure for the first time (while car was cold) and found it was ~45 psig on all four tires when the recommended pressure is 35 psig (sticker inside driver's door)!! I was surprised, so I checked again with a different guage - same results. The car has been driving fine and did not really notice or suspect a problem with tire pressure. I do notice some difference now in feel and ride quality now that dropped it to 35 psig. Maybe, it is just a one time thing, but I wanted to bring this to everyone's attention in case others have same issue. Suggest you check the pressure of your tires. Happy Z driving...

03-08-2009, 05:51 PM	#7 (permalink)
AK370Z Administrator Join Date: Sep 2008 Location: NJ Posts: 9,930 Drives: 09 370Z MB Sports M6 Rep Power: 10	Quick question, How do I know if my tires were filled with air or Nitrogen? If they were Nitrogen, do I HAVE to put nitrogen? I have no clue where the nearest Nitrogen fill up center. __________________ The370Z Signature Pictures ll Want to rock our forum decals on your car? Then click here! ll How to Embed YouTube Videos In a Post STOP! (Hammertime) ll Become a Premium Member Click HERE ll F.A.Q. Are You a Nissan Dealer? Click Here to Become A "Supporting Dealer" and Start Listing Your 370Zs In Our Inventory Section My Monterey Blue Z ll My Exhaust --> My Intake --> G3 Nissan's Official Response Regarding Oil Temp Issue: CLICK HERE Need a Set of Cheap Winter wheels /Tires? Then Visit The Banner Link Below and Place Your Order. You'll Help Keep The370Z Alive.

03-08-2009, 08:27 PM	#9 (permalink)
tvfreakazoid A True Z Fanatic Join Date: Jan 2009 Location: kommie kali Posts: 1,238 Drives: 2015 Audi S5; 6spd. Rep Power: 10324	I hear its really expensive to have it filled with nitrogen. It's like 30 bucks per tire. That is crazy. A local dealership in my area (sactown/Elk grove) has a nitro filling station. I wonder how much they would charge. __________________ Mudders milk

03-09-2009, 05:14 AM	#13 (permalink)
Crash A True Z Fanatic Join Date: Dec 2008 Location: Los Angeles Posts: 1,853 Drives: 02 Corvette Z06 Rep Power: 590	^^^ Correct. There's no reason to fill your tires with NO2. It's really pointless... Don't pay for it. That's like filling your tires with Helium. (Stupid and wasteful) However, depending on if you got the sport package, the tires may be rated for 45PSI for normal driving (tread ware). Most vehicle manuals will say 35PSI to be on the safe side (as most tires are rated at 35PSI), but newer tires these days are rated much higher for daily use. For track days, it's good to air them down to about 30PSI. They're perfectly safe (and definitely going to have more life) at 45PSI if you're not tracking the car. __________________ 2002 Corvette Z06 - Totaled 2003 Corvette Z06 50th Anniversary

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03-08-2009, 02:08 PM	#3 (permalink)
Anatoray Track Member Join Date: Mar 2009 Location: Kentucky Posts: 794 Drives: 09 BLK 370Z Rep Power: 17	I had the same problem. At first, I thought it was just because it was cold, but now that it's in the 70s, and tire pressure alarm light was still up, so I went and checked it.

03-08-2009, 02:13 PM	#4 (permalink)
SoCal 370Z A True Z Fanatic Join Date: Feb 2009 Location: US of A Posts: 2,842 Drives: Answers Rep Power: 33	Same here—all four tires at about 47psi; spare tire was at about 50psi (10psi under). I checked them all the first day we had it.

03-08-2009, 04:42 PM	#5 (permalink)
ArtVandaleigh Base Member Join Date: Jan 2009 Location: NE Ohio Posts: 227 Drives: 09 PW 370Z Rep Power: 675	Funny you mentioned this, as i checked my tires right when i got home from the dealer and all of them were around 45psi too. I'm not sure on Nissan's logic with this as they most certainly know the recommended PSI.

03-08-2009, 04:52 PM	#6 (permalink)
MC Moderator Join Date: Oct 2008 Location: NC Posts: 3,238 Drives: 2015 GTR NISMO Rep Power: 24	tires are usually over inflated during overseas shipping to help reduce the cars moving while on the boats

03-08-2009, 05:56 PM	#8 (permalink)
MC Moderator Join Date: Oct 2008 Location: NC Posts: 3,238 Drives: 2015 GTR NISMO Rep Power: 24	kinda hard to tell....do you have green or blue valve caps thats usually a giveaway. also if you have nitrogen your pressure shouldnt go up more than maybe 2psi under normal driving. where air would go up a bit more no you dont have to have it

03-08-2009, 10:07 PM	#10 (permalink)
Anatoray Track Member Join Date: Mar 2009 Location: Kentucky Posts: 794 Drives: 09 BLK 370Z Rep Power: 17	Nitrogen is just a bonus gas you can put into tires that lasts longer and can give better performance due to being lighter. Most dealerships these days have nitrogen fill stations, and have some kind of plan if you buy a new car from them. I know that the dealership that I got my Z from has some deal where they give you a free nitrogen fill up each year if you purchase the Z or a set of OEM tires from them.

03-08-2009, 10:12 PM	#11 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 191	All my tires were at 36psi

03-09-2009, 03:55 AM	#12 (permalink)
FricFrac A True Z Fanatic Join Date: Dec 2008 Location: Victoria, BC Posts: 1,481 Drives: 370Z 300ZX 280ZX 240 Rep Power: 229	Isn't air 78% Nitrogen anyhow? Does it actually make that much difference?

03-09-2009, 05:20 AM	#14 (permalink)
MC Moderator Join Date: Oct 2008 Location: NC Posts: 3,238 Drives: 2015 GTR NISMO Rep Power: 24	i will give you guys one proven advantage to nitrogen i can vouch for. under hard driving the tire pressure stays very consistant even when the tires get EXTREMELY heated. my tires are about 29PSI cold and after beating on them at autoX or a track they are only up to maybe 32 or maybe 34 in the front under really hard driving. with air your talking alot greater fluctuations in PSI with air i would be atleast 4-5 PSI higher