Left front brake squeals off and on
#1
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Had new pads put on about a month ago. Now the front left squeals when braked hard, but not when braked softly. AND, it does not happen all the time!
Any suggestions other than taking it back to the dealer, who put them on? It's a real hassle to get there and they'll probably say it's something else.
2006 XK8 29000 miles
Any suggestions other than taking it back to the dealer, who put them on? It's a real hassle to get there and they'll probably say it's something else.
2006 XK8 29000 miles
Last edited by plums; 12-08-2012 at 09:06 PM. Reason: title
#2
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Had new pads put on about a month ago. Now the front left squeals when braked hard, but not when braked softly. AND, it does not happen all the time!
Any suggestions other than taking it back to the dealer, who put them on? It's a real hassle to get there and they'll probably say it's something else.
2006 XK8 29000 miles
Any suggestions other than taking it back to the dealer, who put them on? It's a real hassle to get there and they'll probably say it's something else.
2006 XK8 29000 miles
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mbates50 (12-09-2012)
#4
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CRC/Disc brake quiet (05017) | Brake Lube | AutoZone.com
If you want to avoid taking anything apart you may be able to get this spray where you need it to go. Ask the guys at the store and follow the directions on the can. If your issue is purely a function of lack of lubricant between the piston and the backside of the pad this will likely do it for you. It has for me. Buy some "Brakleen" as well and spray the rotor when you are done with the lube. If you are thorough it will clean any lube off of the rotor (you don't want that to be slippery!).
If lubing the back side of the pads (as mentioned in other posts or as I describe) doesn't do it the common issues might be: A) A metallic/semi-metallic pad that just needs a thousand more miles to wear flush to the rotor B) a pad that is seating a bit crooked that would merely need to be taken out and put back in squarely or C) possibly a caliper hanging up (not retracting fully when you press the brake hard). You would hear noise from this after you let off the brake typically. Hopefully the easiest path will get rid of the noise.
If you want to avoid taking anything apart you may be able to get this spray where you need it to go. Ask the guys at the store and follow the directions on the can. If your issue is purely a function of lack of lubricant between the piston and the backside of the pad this will likely do it for you. It has for me. Buy some "Brakleen" as well and spray the rotor when you are done with the lube. If you are thorough it will clean any lube off of the rotor (you don't want that to be slippery!).
If lubing the back side of the pads (as mentioned in other posts or as I describe) doesn't do it the common issues might be: A) A metallic/semi-metallic pad that just needs a thousand more miles to wear flush to the rotor B) a pad that is seating a bit crooked that would merely need to be taken out and put back in squarely or C) possibly a caliper hanging up (not retracting fully when you press the brake hard). You would hear noise from this after you let off the brake typically. Hopefully the easiest path will get rid of the noise.
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mbates50 (12-09-2012)
#5
#6
#7
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Jacsun ...
"2001 XK8. Titanium (LGL), Oatmeal interior (AGD), Black top, Aluminum thermostat housing, steel tensioners, NAV, 18" wheels, Winter package, Premium sound/6 CD, Lines for top replaced, Trans fluid & water pump changed at 30K, antenna bypass switch, hydraulic pressure reduction for convertible top. Purchased in MD on 9/6/12 with 34K."
I almost went to look at that car, I think. A gal near Annapolis, right?
"2001 XK8. Titanium (LGL), Oatmeal interior (AGD), Black top, Aluminum thermostat housing, steel tensioners, NAV, 18" wheels, Winter package, Premium sound/6 CD, Lines for top replaced, Trans fluid & water pump changed at 30K, antenna bypass switch, hydraulic pressure reduction for convertible top. Purchased in MD on 9/6/12 with 34K."
I almost went to look at that car, I think. A gal near Annapolis, right?
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#9
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Jacsun ...
"2001 XK8. Titanium (LGL), Oatmeal interior (AGD), Black top, Aluminum thermostat housing, steel tensioners, NAV, 18" wheels, Winter package, Premium sound/6 CD, Lines for top replaced, Trans fluid & water pump changed at 30K, antenna bypass switch, hydraulic pressure reduction for convertible top. Purchased in MD on 9/6/12 with 34K."
I almost went to look at that car, I think. A gal near Annapolis, right?
"2001 XK8. Titanium (LGL), Oatmeal interior (AGD), Black top, Aluminum thermostat housing, steel tensioners, NAV, 18" wheels, Winter package, Premium sound/6 CD, Lines for top replaced, Trans fluid & water pump changed at 30K, antenna bypass switch, hydraulic pressure reduction for convertible top. Purchased in MD on 9/6/12 with 34K."
I almost went to look at that car, I think. A gal near Annapolis, right?
#10
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I think you got the answer but on the back side of the pads. Its water-thin unlike the grease you would normally use. One would try to get it between the piston and the pad and between any shims and piston or pad. As you and Dennis hinted- you don't want to lube the rotor which is why you want to get something to clean off any overspray. Undoubtedly taking the wheel off and pulling off the pads is the most reliable way to assess and fix your issue. Just wanted to make you aware of a product designed to be used without having to do the disassembly.
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mbates50 (12-11-2012)
#11
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mbates50 (12-12-2012)
#13
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Prior to adjusting, greasing or lubing the brakes, has anyone confirmed that all the pad shims have been correctly installed and that the caliper bracket holding the pads next to the rotor has been cleaned of any foreign material before the replacement pads were installed?
From the initial description, it seems the pads are vibrating against the disc under heavy braking and the vibration is being amplified by the caliper pistons into what is described as a 'squeal'.
From the initial description, it seems the pads are vibrating against the disc under heavy braking and the vibration is being amplified by the caliper pistons into what is described as a 'squeal'.
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