two problems need help with ones with the brakes and another i cant figure out

[Rcflyer330]

Here are my two problems. lets start with the brakes. last year I changed my brakes and rotors now when I am braking lightly about to stop the brakes will make a metal on metal ting. what I think is happening is the pad is shifting up and down in the caliper. the only way I can stop the noise is to put a thin layer of brake grease on the back sides of the pad and the noise will go away until I take to the car wash and it gets washed away then the noise comes back. what I have tried to do to fix this problem is replace all the hardware again and the caliper slide pins. any suggestions for what I can try next? also this is only on the front brakes and the pads are Wagner thermoquiets.

next problem which is more recent is when I accelerate from a stop I will get a tire squealing noise it only happens when accelerating or turning left or right from a stop. I have already ruled out suspension noise because it does not happen at a steady speed going over bumps. tires are new as of April this year. any suggestions there on what it might be?

 

[Flag Gibby]

If the brake pads don't have shims on the back of them then I would add shims and that should help get rid of the noise.
I also wonder if your squealing noise is also coming from the brake pads.

 

[Rcflyer330]

If the brake pads don't have shims on the back of them then I would add shims and that should help get rid of the noise.
I also wonder if your squealing noise is also coming from the brake pads.

With the thermoquiet pads they have what they call a Integrally Molded Insulator which does not need a shim. with the way they are designed I don't think I could even put a shim on there. but i did find a installation document that says not to put any compounds on the back of the pad so this weekend I will remove the thin layer of brake grease I put on there and see if that helps or not.

on the squealing noise I don't think it is a brake noise but I have been wrong before so lets try and fix the brake problem first and see if the other problem goes away. I will be back with my results of removing the grease in a week or so.

 

[pzy3339]

squealing sounds like the serpentine belt to me. Turning the steering wheel while not moving requires a lot of torque to the power steering pump. Pretty typical symptom.

brake pads often come with clips or shims, if they were not used that may be your issue. Could be the pads leave too great a tolerance and the fit is not very tight leading to sloppiness.

 

[Rcflyer330]

squealing sounds like the serpentine belt to me. Turning the steering wheel while not moving requires a lot of torque to the power steering pump. Pretty typical.

If it was the serpentine why do I get a squealing when I am accelerating in a strait line?
I will try later tonight turning the steering wheel while parked to see if the belt or the power steering pump is making noise.

Since you mentioned power steering could it just be the power steering pump itself making the noise?

Also with accelerating in a strait line I only get the squealing when going over a bump in the road.

The pads did not come with any shims or clips. The tolerance is what I thought was causing the noise and that is why I replaced the hardware a second time. The first hardware I put on had a lot of up and down play for the pad to move so I replaced the hardware and there is now very little to no up down play for the pads to move. As of right now the breaks are not making that noise every time I apply the brakes (like before) but I have heard it a couple of times.

So far I am not so impressed with the Wagner thermoquiet brake pads. I didn't know this at the time I put them on my car but my dad's 2006 Hyundai Sonata had the same pads and had constant clicking noises coming from the brakes that could never be stopped for more than a few months. When the brakes need replacing again I will not be putting thermoquite pads on again.

 

[pzy3339]

there are very few things that can make that noise, and the belt speed and the amount of torque it is under are directly related to engine output as it is driven by a pullly on the end of the crankshaft. When you accelerate it accelerates as well and has to "spool up" all the stuff that runs off it(your power steering for example). Good chance this is the issue.

Bearings going bad can also produce a squealing sound and are more likely to do so under load so if that were the culprit you would again start looking in and around the power steering since that seems to be a catalyst for the symptoms.

I suspect you just need a belt? They don't last forever and if you have not already guessed at that I suspect you have never had one go bad before and thus have never replaced it. They cost about $13 and can be changed with a regular ratchet if you have a pipe to put on the end of it or are strong enough. The routing should be under the hood on the fan shroud or you can find it online if you forget how it goes. 5 minute job for someone who has done it before, 30 minute job if you have to figure it out for the first time.

 

[swshawaii]

Did you torque the caliper anchor plates to spec when the rotors were replaced? Torque spec is 122 ft/lbs. Hundreds here have installed Wagner TQ pads without issues, this is the first complaint I've heard. Regarding the belt, remove it with a 3/8" ratchet,
and inspect ALL pulleys for binding. If OK, run the engine without the belt for less than 1 minute and try to isolate the noise. GL

 

[swshawaii]

Also check the sway bar end links, especially if original.

http://www.moogproblemsolver.com/_pdf_en1/MOOG_PS_Bulletin_213006_Sway_Bar_Link_Eng.pdf

 

[Rcflyer330]

The belt actually was just replaced. I will check every thing suggested. And if I don't find anything then I will take it in to be looked at.


Thanks to everyone for the replies and suggestions.

 

[Rcflyer330]

Well I haven't posted my results yet but so far the brakes are not making the click noise on every stop they will do it once in a while though when cold, I can deal with that. The squeaking while going over bumps has not disappeared and it was not the sway bar links, they look almost like new. So since the weather has turned to crud here I will look into the squeaking in the spring. I have a guess it is suspension related now that I have driven it more and payed more attention when it occurs.

Thanks everybody for the suggestions.

 

[mvallyman]

The squeak over bumps could be the sway bar bushings needing grease. I had a 97 Ex that did the same thing and had to remove the brackets and bushings, clean and coat with grease every few years, takes about half hour, spraying them with oil wont help.
If the squealing when turning noise started after the belt was replaced it could be a low quality belt, belt slightly too long, belt tensioner is weak, water or oil getting on the belt.
Hope this helps

 

[Flag Gibby]

The squeaking when going over bumps sounds like the issue that some of the ford fusions had with the bump stop on the front shock needing some grease. It was such a prevalent issue that ford even put out a TSB for it.