Towing and vehicle brakes. Glad I checked the brakes!

Mark42

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Messages
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A month or so ago the brake light went on in our '07 AWD Sienna. This is our primary tow vehicle for our boats. When I checked, the light was on because the brake fluid level was too low. So I topped it off, and made the ever so forgetful "mental note" that the pads are probably wearing low.

Two days ago I drive the Sienna fully loaded with 7 adult passengers all over central NJ in stop/go traffic, highway, and side streets. Brakes make no noise, and perform fine.

Yesterday Cinthia comes home and says that the brakes are making noise and insists I take a test drive. Sure enough, the car doesn't leave the driveway and I can hear a faint "metal on metal" sound.

I run off to the auto parts store and get the top grade OE replacement pads for the front axle, and install the pads. About $78 for the pads out the door.

While the calipers were off, I could see that the top 3/8" or so of the inside of the drivers side rotor was scored from metal on metal contact. The pads proved it. Apparently as the pad wore thin, a 1x2" piece broke off (Toyota parts) and let the backing plate touch the rotor. It was a superficial scrape, and not deep. So I installed new pads, and removed excess fluid from the brake reservoir. I was especially annoyed that the Toyota brake pads had no "wear sensor" that makes noise on the front brakes. But they put them on the rear brakes. Go figure. I like Toyota, but some times the designers are a bunch of dumb asses. And BTW, their idea of "tilt wheel" sucks big time. (rant done). :D

Tomorrow we leave for vacation, and will be towing the Bayliner. Nice to know the front pads are fine. Visual inspection of the rear pads show about 15K miles to go. Will change when we come back home.

Just wanted to share this experience. If I let the brakes go, they would have made a mess of the rotors, and then I would be in for a big job. Glad my wife heard the noise and insisted I take a test drive. As things turned out, we can leave for vacation tomorrow as planned.
 

moonshn

Cadet
Joined
Jul 9, 2009
Messages
27
Re: Towing and vehicle brakes. Glad I checked the brakes!

I would take the rotors to a shop and have them turned to take that scoring off. If not you are going to tear up your new pads real quick like.
 

H20Rat

Vice Admiral
Joined
Mar 8, 2009
Messages
5,204
Re: Towing and vehicle brakes. Glad I checked the brakes!

needing brakes on an '07 already? wow!

I had a brake pad completely come off the backing once, heard a loud crunch while backing up and then saw the remains of it laying in the driveway. I'm REALLY glad that happened when it did, I had almost no braking left because of all the extra space left by the now departed pad.
 

642mx

Lieutenant Commander
Joined
Apr 19, 2008
Messages
1,588
Re: Towing and vehicle brakes. Glad I checked the brakes!

A simple visual inspection while you rotate your tires would've prevented that.
 

Mark42

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Joined
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Messages
9,334
Re: Towing and vehicle brakes. Glad I checked the brakes!

A simple visual inspection while you rotate your tires would've prevented that.

That would assume that we rotate the tires ourselves. Aint gonna happen. :D
 

Mark42

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Joined
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Messages
9,334
Re: Towing and vehicle brakes. Glad I checked the brakes!

I would take the rotors to a shop and have them turned to take that scoring off. If not you are going to tear up your new pads real quick like.

Not for the very edge of one side of a rotor. They were not torn up, just scraped. It will wear smooth in no time.
 

642mx

Lieutenant Commander
Joined
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Messages
1,588
Re: Towing and vehicle brakes. Glad I checked the brakes!

That would assume that we rotate the tires ourselves. Aint gonna happen. :D

Then I'd kick the arse of whoever rotates your tires :)
 

badbird

Petty Officer 2nd Class
Joined
Sep 26, 2009
Messages
109
Re: Towing and vehicle brakes. Glad I checked the brakes!

A month or so ago the brake light went on in our '07 AWD Sienna. This is our primary tow vehicle for our boats. When I checked, the light was on because the brake fluid level was too low. So I topped it off, and made the ever so forgetful "mental note" that the pads are probably wearing low.

Two days ago I drive the Sienna fully loaded with 7 adult passengers all over central NJ in stop/go traffic, highway, and side streets. Brakes make no noise, and perform fine.

Yesterday Cinthia comes home and says that the brakes are making noise and insists I take a test drive. Sure enough, the car doesn't leave the driveway and I can hear a faint "metal on metal" sound.

I run off to the auto parts store and get the top grade OE replacement pads for the front axle, and install the pads. About $78 for the pads out the door.

While the calipers were off, I could see that the top 3/8" or so of the inside of the drivers side rotor was scored from metal on metal contact. The pads proved it. Apparently as the pad wore thin, a 1x2" piece broke off (Toyota parts) and let the backing plate touch the rotor. It was a superficial scrape, and not deep. So I installed new pads, and removed excess fluid from the brake reservoir. I was especially annoyed that the Toyota brake pads had no "wear sensor" that makes noise on the front brakes. But they put them on the rear brakes. Go figure. I like Toyota, but some times the designers are a bunch of dumb asses. And BTW, their idea of "tilt wheel" sucks big time. (rant done). :D

Tomorrow we leave for vacation, and will be towing the Bayliner. Nice to know the front pads are fine. Visual inspection of the rear pads show about 15K miles to go. Will change when we come back home.

Just wanted to share this experience. If I let the brakes go, they would have made a mess of the rotors, and then I would be in for a big job. Glad my wife heard the noise and insisted I take a test drive. As things turned out, we can leave for vacation tomorrow as planned.

actually there is NO need for a brake "wear sensor" on the brake pads as you say... think back a couple days "BRAKE WARNING LIGHT" was on,this light came on and you checked the fluid in the master cylinder "which was low" DING DING DING indicating brakes were worn out... a brake system is a sealed system and the fluid can only go low if there is wear in the brakes or leaking brake fluid.. so essentially Toyota installed a "brake wear sensor" and you ignored it

sorry for the rant but i hear these stories all day long at work

BTW I hope you have a great vacation
Ron
 

Mark42

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Joined
Oct 8, 2003
Messages
9,334
Re: Towing and vehicle brakes. Glad I checked the brakes!

actually there is NO need for a brake "wear sensor" on the brake pads as you say... think back a couple days "BRAKE WARNING LIGHT" was on,this light came on and you checked the fluid in the master cylinder "which was low" DING DING DING indicating brakes were worn out... a brake system is a sealed system and the fluid can only go low if there is wear in the brakes or leaking brake fluid.. so essentially Toyota installed a "brake wear sensor" and you ignored it

sorry for the rant but i hear these stories all day long at work

BTW I hope you have a great vacation
Ron

Toyota is a contradiction. They put wear sensors on the back disk brakes, but not the front. So they feel you need a constant reminder when the rear disks are going, but not the front. I don't get it.

Just one of the many stupid things I don't like about our Sienna. Its a good vehicle, but Toyota can not design Tilt Wheel, Power Seats, and switch/control placement to save their life. Otherwise it's fine.
 
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