rev up your engines, today I'm going to show you how you can make your car quieter
now when I was a young mechanic, first thing I wondered was, why are some cars
a lot noisier than others, and it turns out a lot has to do with the insulation
that they either put in the car or in the cheaper cars, didn't put hardly any at
all in, now here's an example, we're going to drive my wife's Lexus and see what
the decibel is driving around, I'm driving around I'm going to do a little
minimum and maximum to see what the average sound, is driving around a
neighborhood here, well the minimum was forty one point seven, and the maximum
was forty eight point zero, and now we'll check out this Toyota Matrix, it has very
little insulation in it, and here we go, and here you can see the minimum is
forty five point eight, and the maximum was sixty eight point nine, a lot louder
car, now a lot of that noise comes from a lack of insulation and the matrix, inside
the door panels, no real insulation, also tell from the outside, listen to this
you hear the echo, but on the Lexus, you can hear it's a much more solid sound
it's not as tinny, because there's insulation inside, but guess what
you can add insulation to your car, I found this company Dr. Artex of
Singapore, they've been doing sound deadening stuff for decades and they
really know their stuff, they have various layers of insulation and
soundproofing that you can add to your vehicle, now for things like the inside
of your trunk, they have this very good thick lace stuff that fits in it
compresses fine, and it'll really quiet noise down for when you're driving down
the road, especially at highway speeds will you get a lot of tire noise and
other car vibration noises, it is self-adhesive backing, so it sticks on
pretty good and of course realize this isn't a two-second job putting
insulation in, in this case, you got to take the whole plastic panel off, then
you get isopropyl alcohol, clean it all off all the metal, and then stick the
insulation on, and cut it to make sure it fits,
of course putting it up inside here is an easier job, because it's all in the open, and of
course the trunks are easy to do, this being a Lexus, it already has it in there
it was made that way, and to do all the doors of course you have to take the door
panel off, then you cut the insulation to fit inside, and put it on the skin on the
far side to keep noise down while you're driving, and true fanatics they'll
even take it off on the top of the car inside and take the liner out put
insulation in and then put the liner back on to make it even quieter and they'll also
remove the seats, and the carpeting, and then they'll stick the bottom insulation
on, now you can't have really thick insulation in the bottom, so that's this
metallic stuff, it's a lot thinner, you strip it down to the bare metal, then you
cut all these pieces, put them in all the nooks and crannies, then put the carpets
and the seats back on, yes it's labor-intensive, but if you want
a quiet car, hey this is the way to go, if you've ever seen those lowrider cars
with the giant mega bass in the trunk, the cheap ones, you hear them rattle like
mad, but the good ones, they use all this sound insulation in the trunk and all
over the car and it doesn't rattle it's got a crisp sound
yes it's loud, but this keeps it from rattling, now I just did the inside of the doors
and the trunk on this matrix, let's see what a difference that makes, we'll turn
on a decibel meter, and now the minimum is 36.3 and the maximum is fifty four
point one, so both readings are lower, so if you want a quieter car or if you're
an audiophile and you want your sound system to sound as crisp as possible
inside the car, you might want to try some of this Dr. Artex sound
insulation out, and since this is mechanic Monday, I'm giving away some of
this Dr. Artex sound insulation, just place a clean non offensive comment
on the YouTube comments below and the winner will be randomly chosen by a
computer, sadly cats are not allowed to apply,
so if you never want to miss another one of my new car repair videos, remember to
ring that Bell!