Overinflated tires

Sunshine · 07-15-2007, 04:48 PM

Hmmm... I checked my air pressure for the first time in four months and I discovered that the dealership forgot to deflat the tires when I got the car. All for tires had about 38 PSI. The recommended tires pressure is 32 PSI.

kelmar · 07-15-2007, 04:52 PM

Did you just get done driving anywhere or has it been sitting for a few hours?

Your air pressure readings will be high for around 4 hours after you have last driven the car.

Sunshine · 07-15-2007, 05:13 PM

I haven't driven the car for about 12 hours when I checked my air pressure. I heard that Honda inflates all of their tires to 40 PSI when they deliver it to their customers. I assumed that they already deflated the tires for me, but I was quite shocked that they didn't. Well, I had to deflate the tires to 32 PSI.

BigT · 07-15-2007, 05:14 PM

Quote:

Originally Posted by kelmar

Did you just get done driving anywhere or has it been sitting for a few hours?

Your air pressure readings will be high for around 4 hours after you have last driven the car.

Right. You should only check your tire pressure after the car has been sitting for a while. When you drive your tires heat up. This rise in temperature causes the tire pressure to go up. The recommended pressure settings are for cold (meaning ambiant air temp) tires.

BigT · 07-15-2007, 05:18 PM

Oops, you must have posted while I was typing. I think mine were about 35 when I got my car. I had to let a few pounds out. The person who prepped your car for delivery probably overlooked this step, or simply didn't let enough out.

Was it very cold when you got your car? Tire pressure can rise up to a pound for every ten degrees of air temp rise. If it was 20 degrees when you got your car and is 80 degrees now, that could account for some of the difference.

Sunshine · 07-15-2007, 05:25 PM

No, it wasn't cold when I got my car. It was only about 50 degrees Fahrenheit. Today's weather is 75 degrees. The tires are Goodyear Eagle RS-A.

kelmar · 07-15-2007, 05:28 PM

Sounds like they just messed up then. Good catch. Thanks for letting the rest of us know to keep an eye out for it!

Way2Short · 07-15-2007, 05:31 PM

so what is the tire pressure when it hasn't been driven for 12 hours? I'm guessing 32 psi.

Sunshine · 07-15-2007, 05:34 PM

I haven't driven the car after I deflated the tires and I'm sure it will probably ride a bit better. For the last four months, the ride quality has been rather bumpy. I hope after the deflation, it will improve the ride quality. Fuel economy has been great and I hope the deflation of the tire pressure won't lower the MPG.

I was quite wary of the tires because they felt rock hard after 4 months of driving in city stop and go traffic. I think everyone should go check their tires if you recently purchased a new Civic.

kelmar · 07-15-2007, 05:37 PM

Quote:

Originally Posted by Way2Short

so what is the tire pressure when it hasn't been driven for 12 hours? I'm guessing 32 psi.

Honda recommends 32 IIR. If you open your drivers side door, look at the sticker that's on the body there. It'll have all that info for you, including the PSI your spare should be set to.

Quote:

Originally Posted by Sunshine

I haven't driven the car after I deflated the tires and I'm sure it will probably ride a bit better. For the last four months, the ride quality has been rather bumpy. I hope after the deflation, it will improve the ride quality. Fuel economy has been great and I hope the deflation of the tire pressure won't lower the MPG.

It should help with the bumpiness a little bit. And it likely will effect MPG, though not drastically.

Sunshine · 07-15-2007, 08:22 PM

I just drove my car after deflating the air pressure to 32 PSI. I noticed quite a difference in the ride quality. I can say the ride quality is more civilized and refined. The ride quality is about as good as the previous generation Corollas after the air deflation. Now, I have to fix my front bumpers from the silly concrete parking curb.

Mateen · 07-15-2007, 10:38 PM

I keep mine at 38 psi and the ride seems a lot more responsive

02civicsi · 07-15-2007, 11:25 PM

My fronts are @ 38psi & the rears 33psi. I adjust my tire with a laser temp reader to read the surface temp of the tire. Those pressures gave me the most consistently even temps across the entire tread of the tire. The reason for the 5lb difference is because my FA5 is gutted(only have the two fronts seats).

RJJensen · 07-15-2007, 11:34 PM

mine were also high from the dealer after adjusting to 31 the ride was much better...note that tires should be checked in the morning before you drive more than a few miles, or before rising air temps or the sun's rays affects it...that is u dont have to drive for the tires to warm up and pressures increase...just sitting in the sun on a warm day will do it

bangmonsta · 07-16-2007, 12:01 AM

From my understanding, higher pressure = better response (bumper ride) and higher MPG because of less resistance between tires & road.

However, it will add strain to your tires. I guess the recommended 32 is a good compromise between both. I think for Si it's 32psi for the front and 30 for the rear if I remember correctly from my Owner's guide.

07-15-2007, 04:48 PM	#1 (permalink)
Sunshine Senior Member Join Date: Apr 2007 Posts: 256 iTrader: 0 / 0%	Overinflated tires Hmmm... I checked my air pressure for the first time in four months and I discovered that the dealership forgot to deflat the tires when I got the car. All for tires had about 38 PSI. The recommended tires pressure is 32 PSI.

07-15-2007, 05:13 PM	#3 (permalink)
Sunshine Senior Member Join Date: Apr 2007 Posts: 256 iTrader: 0 / 0%	I haven't driven the car for about 12 hours when I checked my air pressure. I heard that Honda inflates all of their tires to 40 PSI when they deliver it to their customers. I assumed that they already deflated the tires for me, but I was quite shocked that they didn't. Well, I had to deflate the tires to 32 PSI. Last edited by Sunshine; 07-15-2007 at 08:45 PM.

07-15-2007, 05:34 PM	#9 (permalink)
Sunshine Senior Member Join Date: Apr 2007 Posts: 256 iTrader: 0 / 0%	I haven't driven the car after I deflated the tires and I'm sure it will probably ride a bit better. For the last four months, the ride quality has been rather bumpy. I hope after the deflation, it will improve the ride quality. Fuel economy has been great and I hope the deflation of the tire pressure won't lower the MPG. I was quite wary of the tires because they felt rock hard after 4 months of driving in city stop and go traffic. I think everyone should go check their tires if you recently purchased a new Civic. Last edited by Sunshine; 07-15-2007 at 05:40 PM.

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07-15-2007, 04:52 PM	#2 (permalink)
kelmar Senior Member Join Date: Apr 2007 Posts: 1,186 iTrader: 1 / 100%	Did you just get done driving anywhere or has it been sitting for a few hours? Your air pressure readings will be high for around 4 hours after you have last driven the car.

07-15-2007, 05:18 PM	#5 (permalink)
BigT Senior Member Join Date: Jun 2007 Location: Duff Beer Krusty Burger Buzz Cola Costington's Department Store Kwik-E-Mart Stupid Flanders Park Posts: 1,784 iTrader: 1 / 100%	Oops, you must have posted while I was typing. I think mine were about 35 when I got my car. I had to let a few pounds out. The person who prepped your car for delivery probably overlooked this step, or simply didn't let enough out. Was it very cold when you got your car? Tire pressure can rise up to a pound for every ten degrees of air temp rise. If it was 20 degrees when you got your car and is 80 degrees now, that could account for some of the difference.

07-15-2007, 05:25 PM	#6 (permalink)
Sunshine Senior Member Join Date: Apr 2007 Posts: 256 iTrader: 0 / 0%	No, it wasn't cold when I got my car. It was only about 50 degrees Fahrenheit. Today's weather is 75 degrees. The tires are Goodyear Eagle RS-A.

07-15-2007, 05:28 PM	#7 (permalink)
kelmar Senior Member Join Date: Apr 2007 Posts: 1,186 iTrader: 1 / 100%	Sounds like they just messed up then. Good catch. Thanks for letting the rest of us know to keep an eye out for it!

07-15-2007, 05:31 PM	#8 (permalink)
Way2Short Senior Member Join Date: Mar 2006 Age: 21 Posts: 1,991 iTrader: 23 / 100%	so what is the tire pressure when it hasn't been driven for 12 hours? I'm guessing 32 psi.

07-15-2007, 08:22 PM	#11 (permalink)
Sunshine Senior Member Join Date: Apr 2007 Posts: 256 iTrader: 0 / 0%	I just drove my car after deflating the air pressure to 32 PSI. I noticed quite a difference in the ride quality. I can say the ride quality is more civilized and refined. The ride quality is about as good as the previous generation Corollas after the air deflation. Now, I have to fix my front bumpers from the silly concrete parking curb.

07-15-2007, 10:38 PM	#12 (permalink)
Mateen Senior Member Join Date: Oct 2006 Location: S. CA Age: 51 Posts: 394 iTrader: 0 / 0%	I keep mine at 38 psi and the ride seems a lot more responsive

07-15-2007, 11:25 PM	#13 (permalink)
02civicsi Senior Member Join Date: Jan 2007 Location: Lonnngwoooood, FL Posts: 8,040 I am the Juggernaut!!! iTrader: 18 / 100%	My fronts are @ 38psi & the rears 33psi. I adjust my tire with a laser temp reader to read the surface temp of the tire. Those pressures gave me the most consistently even temps across the entire tread of the tire. The reason for the 5lb difference is because my FA5 is gutted(only have the two fronts seats).

07-15-2007, 11:34 PM	#14 (permalink)
RJJensen Senior Member Join Date: Apr 2007 Location: NJ Posts: 919 iTrader: 0 / 0%	mine were also high from the dealer after adjusting to 31 the ride was much better...note that tires should be checked in the morning before you drive more than a few miles, or before rising air temps or the sun's rays affects it...that is u dont have to drive for the tires to warm up and pressures increase...just sitting in the sun on a warm day will do it

07-16-2007, 12:01 AM	#15 (permalink)
bangmonsta Senior Member Join Date: Jul 2007 Location: Fort Worth, TX Age: 23 Posts: 348 iTrader: 0 / 0%	From my understanding, higher pressure = better response (bumper ride) and higher MPG because of less resistance between tires & road. However, it will add strain to your tires. I guess the recommended 32 is a good compromise between both. I think for Si it's 32psi for the front and 30 for the rear if I remember correctly from my Owner's guide.