If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Front Rotor Concern, 02 WJ
Hi All,
I went down under to do my first oil change on my '02 Grand Cherokee and to get acquainted with the underside. I noticed the inboard side of both front brake rotors appear as if the disc pad is not contacting them completely. There is some shine/wear around the outside, oh, 3/4 inch or so and it diminishes to about no wear toward the hub. I sense no braking problem in the car at all. The outboard side of both rotors is shiny/worn equally as you'd expect. I thought I'd ask the group what your opinion of the malady is. I will of course be pulling the calipers in a couple days to lube the pins and such, but it seems odd that both sides would develop a problem at the same time. Do I have a couple bum calipers all at once? The car has 40K miles on it now. Was about 37,500 when I got her. As an observation, they, DC, sure placed that oil filter in a bad spot. The filter on my 93, 4.0 liter was on the passenger side and easily changed from above. This one is underneath and is sure easy to get a faceful of hot oil if you're not careful. Thanks, D |
Ads |
#2
|
|||
|
|||
Front Rotor Concern, 02 WJ
I believe you are looking at the steel plate that's bonded to the
brake pad, the open distance is how thick it is: http://www.billhughes.com/WJCaliber.jpg Probably the easiest way to see the actual thickness is to take the wheel off and look through the caliper: http://www.billhughes.com/dana25knuckle.jpg God Bless America, Bill O|||||||O D wrote: > > Hi All, > I went down under to do my first oil change on my '02 Grand Cherokee and to > get acquainted with the underside. I noticed the inboard side of both front > brake rotors appear as if the disc pad is not contacting them completely. > There is some shine/wear around the outside, oh, 3/4 inch or so and it > diminishes to about no wear toward the hub. I sense no braking problem in > the car at all. The outboard side of both rotors is shiny/worn equally as > you'd expect. > I thought I'd ask the group what your opinion of the malady is. I will of > course be pulling the calipers in a couple days to lube the pins and such, > but it seems odd that both sides would develop a problem at the same time. > Do I have a couple bum calipers all at once? > The car has 40K miles on it now. Was about 37,500 when I got her. > As an observation, they, DC, sure placed that oil filter in a bad spot. The > filter on my 93, 4.0 liter was on the passenger side and easily changed from > above. This one is underneath and is sure easy to get a faceful of hot oil > if you're not careful. > Thanks, > D |
#3
|
|||
|
|||
Front Rotor Concern, 02 WJ
Hi Bill,
No, no the actual brake rotor/disc itself is what I'm talking about. It shows little or no wear. Mine is not evenly shiny where the pad contacts it as the one is in the picture you sent. Thanks. Denny "L.W.(Bill) Hughes III" > wrote in message ... > I believe you are looking at the steel plate that's bonded to the > brake pad, the open distance is how thick it is: > http://www.billhughes.com/WJCaliber.jpg Probably the easiest way to see > the actual thickness is to take the wheel off and look through the > caliper: http://www.billhughes.com/dana25knuckle.jpg > God Bless America, Bill O|||||||O > > > D wrote: > > > > Hi All, > > I went down under to do my first oil change on my '02 Grand Cherokee and to > > get acquainted with the underside. I noticed the inboard side of both front > > brake rotors appear as if the disc pad is not contacting them completely. > > There is some shine/wear around the outside, oh, 3/4 inch or so and it > > diminishes to about no wear toward the hub. I sense no braking problem in > > the car at all. The outboard side of both rotors is shiny/worn equally as > > you'd expect. > > I thought I'd ask the group what your opinion of the malady is. I will of > > course be pulling the calipers in a couple days to lube the pins and such, > > but it seems odd that both sides would develop a problem at the same time. > > Do I have a couple bum calipers all at once? > > The car has 40K miles on it now. Was about 37,500 when I got her. > > As an observation, they, DC, sure placed that oil filter in a bad spot. The > > filter on my 93, 4.0 liter was on the passenger side and easily changed from > > above. This one is underneath and is sure easy to get a faceful of hot oil > > if you're not careful. > > Thanks, > > D |
#4
|
|||
|
|||
Front Rotor Concern, 02 WJ
Sure sounds like the caliper is sticking. It may have caused the other side
to overheat, glaze and/or perhaps warped the rotor. Do you know if you have the Teves (early '02 black) or Akebono (late '02 Silver) calipers? Do you get pulsations or shaking during braking? Any pulling to one side or the other? Noisy? You will have to pull the wheel to get a look at it, preferably pull the caliper too to get a good look "D" > wrote in message ... > Hi Bill, > No, no the actual brake rotor/disc itself is what I'm talking about. It > shows little or no wear. Mine is not evenly shiny where the pad contacts > it > as the one is in the picture you sent. > Thanks. > Denny > > "L.W.(Bill) Hughes III" > wrote in message > ... >> I believe you are looking at the steel plate that's bonded to the >> brake pad, the open distance is how thick it is: >> http://www.billhughes.com/WJCaliber.jpg Probably the easiest way to see >> the actual thickness is to take the wheel off and look through the >> caliper: http://www.billhughes.com/dana25knuckle.jpg >> God Bless America, Bill O|||||||O >> >> >> D wrote: >> > >> > Hi All, >> > I went down under to do my first oil change on my '02 Grand Cherokee >> > and > to >> > get acquainted with the underside. I noticed the inboard side of both > front >> > brake rotors appear as if the disc pad is not contacting them > completely. >> > There is some shine/wear around the outside, oh, 3/4 inch or so and it >> > diminishes to about no wear toward the hub. I sense no braking problem > in >> > the car at all. The outboard side of both rotors is shiny/worn equally > as >> > you'd expect. >> > I thought I'd ask the group what your opinion of the malady is. I will > of >> > course be pulling the calipers in a couple days to lube the pins and > such, >> > but it seems odd that both sides would develop a problem at the same > time. >> > Do I have a couple bum calipers all at once? >> > The car has 40K miles on it now. Was about 37,500 when I got her. >> > As an observation, they, DC, sure placed that oil filter in a bad spot. > The >> > filter on my 93, 4.0 liter was on the passenger side and easily changed > from >> > above. This one is underneath and is sure easy to get a faceful of hot > oil >> > if you're not careful. >> > Thanks, >> > D > > |
#5
|
|||
|
|||
Front Rotor Concern, 02 WJ
Hi Denny,
That's nearly impossible to freeze a piston and not have it drag and burn: http://www.billhughes.com/WJCaliber.jpg Take her in as see what a mechanic says. God Bless America, Bill O|||||||O http://www.billhughes.com/ D wrote: > > Hi Bill, > No, no the actual brake rotor/disc itself is what I'm talking about. It > shows little or no wear. Mine is not evenly shiny where the pad contacts it > as the one is in the picture you sent. > Thanks. > Denny |
#6
|
|||
|
|||
Front Rotor Concern, 02 WJ
To get that wear pattern, there must be some combination of warped rotor
(dished in), bad or misseated pad, or caliper piston cocked over. I'd tear it down, see what the inboard pads look like. At 40 k miles, youshould have something like 1/2 wear on the pads, should be very noticeable. On the other hand, you may find very little wear, that would point to frozen mounitng pins. D wrote: > Hi All, > I went down under to do my first oil change on my '02 Grand Cherokee and to > get acquainted with the underside. I noticed the inboard side of both front > brake rotors appear as if the disc pad is not contacting them completely. > There is some shine/wear around the outside, oh, 3/4 inch or so and it > diminishes to about no wear toward the hub. I sense no braking problem in > the car at all. The outboard side of both rotors is shiny/worn equally as > you'd expect. > I thought I'd ask the group what your opinion of the malady is. I will of > course be pulling the calipers in a couple days to lube the pins and such, > but it seems odd that both sides would develop a problem at the same time. > Do I have a couple bum calipers all at once? > The car has 40K miles on it now. Was about 37,500 when I got her. > As an observation, they, DC, sure placed that oil filter in a bad spot. The > filter on my 93, 4.0 liter was on the passenger side and easily changed from > above. This one is underneath and is sure easy to get a faceful of hot oil > if you're not careful. > Thanks, > D > > |
#7
|
|||
|
|||
Front Rotor Concern, 02 WJ
You can't predict wear according to mileage, unless you know driving style
and where driven. It could be that the calipers are mounted on a slight slant, to prevent squealing and grabbing, and that the pads just haven't worn in that far yet. I would take it to a Jeep dealer and ask them if they have seen it before. Of course, if the performance is good I would resist buying new calipers, new rotors, new spindles, etc. unless they showed me some kind of TSB or service manager's bulletin from the manufacturer. Maybe there is a shim that can be installed. For the faceful of hot oil buy some metal ramps or build a set out of stacked two-by-sixes like I have. If you are older like Bill maybe two-by-tens would be easier to see. Earle "RoyJ" > wrote in message nk.net... > To get that wear pattern, there must be some combination of warped rotor > (dished in), bad or misseated pad, or caliper piston cocked over. I'd > tear it down, see what the inboard pads look like. At 40 k miles, > youshould have something like 1/2 wear on the pads, should be very > noticeable. > > On the other hand, you may find very little wear, that would point to > frozen mounitng pins. > > D wrote: > > > Hi All, > > I went down under to do my first oil change on my '02 Grand Cherokee and to > > get acquainted with the underside. I noticed the inboard side of both front > > brake rotors appear as if the disc pad is not contacting them completely. > > There is some shine/wear around the outside, oh, 3/4 inch or so and it > > diminishes to about no wear toward the hub. I sense no braking problem in > > the car at all. The outboard side of both rotors is shiny/worn equally as > > you'd expect. > > I thought I'd ask the group what your opinion of the malady is. I will of > > course be pulling the calipers in a couple days to lube the pins and such, > > but it seems odd that both sides would develop a problem at the same time. > > Do I have a couple bum calipers all at once? > > The car has 40K miles on it now. Was about 37,500 when I got her. > > As an observation, they, DC, sure placed that oil filter in a bad spot. The > > filter on my 93, 4.0 liter was on the passenger side and easily changed from > > above. This one is underneath and is sure easy to get a faceful of hot oil > > if you're not careful. > > Thanks, > > D > > > > |
#8
|
|||
|
|||
Front Rotor Concern, 02 WJ
It's really common up here in the rust belt Bill. The sliders and pins
get corroded and sticky easy. The ends of the pads even wear notches in the slider jamming them up big time. Then the slider face has to be rebuilt or replaced. They need a good lube job, better than the factory does, that's for sure. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) "L.W.(Bill) Hughes III" wrote: > > Hi Denny, > That's nearly impossible to freeze a piston and not have it drag > and burn: http://www.billhughes.com/WJCaliber.jpg Take her in as see > what a mechanic says. > God Bless America, Bill O|||||||O > http://www.billhughes.com/ > > D wrote: > > > > Hi Bill, > > No, no the actual brake rotor/disc itself is what I'm talking about. It > > shows little or no wear. Mine is not evenly shiny where the pad contacts it > > as the one is in the picture you sent. > > Thanks. > > Denny |
#9
|
|||
|
|||
Front Rotor Concern, 02 WJ
Since you mention that Mike, it brings to mind something else I noticed on
this WJ. I wash it in the driveway and notice that in 30 minutes the brake rotors have patches of rust on the face. It disappears as soon as I drive any distance, but if the setup is prove to corrosion, then that might be the problem. I just went out to look and the calipers are the black ones. Looks like I might have a $300+ afternoon in the driveway coming up in the near future. Dangit. Thanks for all of you guyz input. Denny "Mike Romain" > wrote in message ... > It's really common up here in the rust belt Bill. The sliders and pins > get corroded and sticky easy. The ends of the pads even wear notches in > the slider jamming them up big time. Then the slider face has to be > rebuilt or replaced. They need a good lube job, better than the factory > does, that's for sure. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > "L.W.(Bill) Hughes III" wrote: > > > > Hi Denny, > > That's nearly impossible to freeze a piston and not have it drag > > and burn: http://www.billhughes.com/WJCaliber.jpg Take her in as see > > what a mechanic says. > > God Bless America, Bill O|||||||O > > http://www.billhughes.com/ > > > > D wrote: > > > > > > Hi Bill, > > > No, no the actual brake rotor/disc itself is what I'm talking about. It > > > shows little or no wear. Mine is not evenly shiny where the pad contacts it > > > as the one is in the picture you sent. > > > Thanks. > > > Denny |
#10
|
|||
|
|||
Front Rotor Concern, 02 WJ
That is flash rust, it means nothing...
(every vehicle gets it) "D" > wrote in message ... > Since you mention that Mike, it brings to mind something else I noticed on > this WJ. I wash it in the driveway and notice that in 30 minutes the brake > rotors have patches of rust on the face. It disappears as soon as I drive > any distance, but if the setup is prove to corrosion, then that might be > the > problem. > I just went out to look and the calipers are the black ones. Looks like I > might have a $300+ afternoon in the driveway coming up in the near future. > Dangit. > Thanks for all of you guyz input. > Denny > > "Mike Romain" > wrote in message > ... >> It's really common up here in the rust belt Bill. The sliders and pins >> get corroded and sticky easy. The ends of the pads even wear notches in >> the slider jamming them up big time. Then the slider face has to be >> rebuilt or replaced. They need a good lube job, better than the factory >> does, that's for sure. >> >> Mike >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >> 88 Cherokee 235 BFG AT's >> Canadian Off Road Trips Photos: Non members can still view! >> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 >> (More Off Road album links at bottom of the view page) >> >> "L.W.(Bill) Hughes III" wrote: >> > >> > Hi Denny, >> > That's nearly impossible to freeze a piston and not have it drag >> > and burn: http://www.billhughes.com/WJCaliber.jpg Take her in as see >> > what a mechanic says. >> > God Bless America, Bill O|||||||O >> > http://www.billhughes.com/ >> > >> > D wrote: >> > > >> > > Hi Bill, >> > > No, no the actual brake rotor/disc itself is what I'm talking about. > It >> > > shows little or no wear. Mine is not evenly shiny where the pad > contacts it >> > > as the one is in the picture you sent. >> > > Thanks. >> > > Denny > > |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
156 Front Bumper Removal | Zathras | Alfa Romeo | 6 | April 26th 06 11:49 PM |
what causes shaking? | [email protected] | VW water cooled | 24 | April 22nd 06 03:43 PM |
92 Explorer Front End noise | E | Ford Explorer | 3 | March 1st 06 08:58 PM |
91 Ford Explorer front end noise | [email protected] | 4x4 | 0 | February 23rd 06 04:23 PM |