Brought to you by 1AAuto.com, your source
for quality replacement parts and the best service on the Internet. Hi, I’m Mike from 1A Auto. In this video, we’re going to really tackle
a very basic car care item. This video is going to be geared more towards really the
new driver, or somebody that doesn’t know really about their car but is curious to learn.
As you may have guessed from the title, we’re going to talk about tires, in particular,
checking and adjusting tire pressure. All tires have a valve stem. It’s usually
black rubber, but sometimes silver. If you examine the valve closely, you’ll see that
there is a black or silver cap on some vehicles. You want to remove that cap. That cap is important,
it keeps dust and dirt out of the valve. Now, we’re going to check the tire pressure.
We’re going to use a stick gauge, and we press it onto the tire. The gauge pushes out to
show you the pressure, as you can see there. It’s good to know how to use one of these
correctly. You’re going to see the stem is made of rubber. All that hissing there that
you hear, that’s me doing it on purpose. You want to make sure you push that gauge on there
so you don’t hear any hissing at all. It takes a firm push, and you kind of have to make
sure you push straight against the valve stem. You can move it around a little bit until
it stops. Once you get a good solid connection, then you’ll get a good reading on the gauge. Now, we’re going to talk about removing air.
We’re going to close up, really close up on the valve, and you can see there’s a little
peg on the center on the gauge. There’s a couple of different things that you can use.
Push in the center and hear the air come to. That’s how you would release air if you had
too high a pressure in your tire. Here, we’re going to check the pressure. It’s about 40
there. Then we want it down near 33. We’re going to press again and release air. If you watch the tire close, you can actually
see the tire change form a little bit. Recheck. It’s come down some. What I like to do is
count while I’m releasing it. Then on that count, I know how much comes out each time.
We just let it out, check it and let it out again We’re going to try and get it down to
right around 32 to 33 PSI. Now, let’s talk about adding air or what to
do if our pressure is low. I’ll actually remove some air and you can see that our pressure
is down below 30. We want to get it back up to the 32 to 33 range. You’ll need an air
compressor. The one I have is somewhat representative of what you might at a gas station/filling
station, the one we have to add quarters or something. You press firmly. You hear there,
I pressed lightly and you heard air come out of the tire. You want to press firmly. When
you press firmly on this style, you’ll get a gauge that pops out similar to the stick
gauge. You press firmly on. Again, if I don’t press firmly, I can hear a loud air escaping
the tire. Press firmly on. That loud sound that you heard before was not correct. You
want to hear this sound. Press firmly on. Press the fill button and you hear the go
into the tire.I always double check with my stick gauge. I can see I actually have kind
of overfilled it. I’m going to let some air out again to get it to the right pressure.
Check again. I’m at that 32 to 33 mark. Then always replace your valve stem cap. Again,
it keeps the dirt and dust out of there, making sure that your tire doesn’t deflate prematurely.
We’ve shown you how to increase or inflate or deflate your tire and increase pressure. Now, you may ask, how do I know what pressure
my tire should be? All tires will have a max pressure on their side wall. You’ll see I’m
using a little chalk to bring out the letters there. You can see right there it says 51
PSI. That’s the maximum recommended pressure for this tire by the manufacturer. I’m just
going to zoom in a little better so you’ll see that 51 PSI. There’s a lot of other information
but the 51 PSI is the most important for this video. On this other tire, you can see it’s
a little different. It’s a 44 PSI maximum pressure. Those were the tire manufacturer.
Now, your vehicle manufacturer will put a sticker either on the door pillar, or maybe
it’s on actually the door, the driver’s door. You can see here, this is manufacturer’s recommended
pressure for the tires. The manufacturers have done all kinds of testing with the car
and the 33 PSI you see here is what Volkswagen in this particular case feels is the best
tire pressure. That has to do with comfort of the vehicle as well. This may cause you to say, which one should
I use? For the most part, you’re going to want to use the vehicle manufacturer one.
That’s going to get you the best or most comfortable right. I have used the higher pressure in
cases where I know I’m going to go on a long trip on fairly smooth highways. If you inflate
to a higher pressure, you will get slightly better gas mileage because your tire will
be slightly harder but you’ll be sacrificing a little bit of ride comfort. In this case
where we had a 44 PSI and a 51 PSI, I would only inflate the tires to the 44 PSI. You
don’t ever want to inflate the tire over the tire manufacturer’s recommended pressure. Thanks for tuning in. We hope this video helped
you out. Next time you need parts for your car, please visit 1AAuto.com. Also check out
our other helpful how-to as well as diagnosis videos.