Lug nut torque & warped rotors
 

My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
completing the repairs, I'm surmising that her driving style didn't cause
the problem. While removing the lug nuts with a breaker bar, I felt a
disparity in the effort required to loosen them. Hmmm. That can't be good.
I wondered what the torque was on the other wheel, so I used a torque wrench
to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F wheel!
Just for safety's sake, I checked the rear wheels. Same sad shape. Torque
was all over the map. Moral of the story - when the dealer is doing
warranty work (power window) and asks if you want your tires rotated - tell
'em "No, thanks" - unless you can oversee the job. Incidentally, the old
rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
spots. The pads have 5/16 of friction material left. My money says that
the dealer's tire-jockey has caused me (and likely many others) to suffer
from warped rotors. Intentionally, perhaps? Hard to prove. Word to the
wise - the 2003 WJ has rotors made of soft cast iron. Inattention to wheel
torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

It is well known enough that it had to be done on purpose by the
$tealer.

I most certainly would bring the invoice with the mileage on it back to
the $tealer and be wanting free rotors, if not the install too.

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)

klutz wrote:
>
> My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> completing the repairs, I'm surmising that her driving style didn't cause
> the problem. While removing the lug nuts with a breaker bar, I felt a
> disparity in the effort required to loosen them. Hmmm. That can't be good.
> I wondered what the torque was on the other wheel, so I used a torque wrench
> to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F wheel!
> Just for safety's sake, I checked the rear wheels. Same sad shape. Torque
> was all over the map. Moral of the story - when the dealer is doing
> warranty work (power window) and asks if you want your tires rotated - tell
> 'em "No, thanks" - unless you can oversee the job. Incidentally, the old
> rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> spots. The pads have 5/16 of friction material left. My money says that
> the dealer's tire-jockey has caused me (and likely many others) to suffer
> from warped rotors. Intentionally, perhaps? Hard to prove. Word to the
> wise - the 2003 WJ has rotors made of soft cast iron. Inattention to wheel
> torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

It is well known enough that it had to be done on purpose by the
$tealer.

I most certainly would bring the invoice with the mileage on it back to
the $tealer and be wanting free rotors, if not the install too.

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)

klutz wrote:
>
> My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> completing the repairs, I'm surmising that her driving style didn't cause
> the problem. While removing the lug nuts with a breaker bar, I felt a
> disparity in the effort required to loosen them. Hmmm. That can't be good.
> I wondered what the torque was on the other wheel, so I used a torque wrench
> to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F wheel!
> Just for safety's sake, I checked the rear wheels. Same sad shape. Torque
> was all over the map. Moral of the story - when the dealer is doing
> warranty work (power window) and asks if you want your tires rotated - tell
> 'em "No, thanks" - unless you can oversee the job. Incidentally, the old
> rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> spots. The pads have 5/16 of friction material left. My money says that
> the dealer's tire-jockey has caused me (and likely many others) to suffer
> from warped rotors. Intentionally, perhaps? Hard to prove. Word to the
> wise - the 2003 WJ has rotors made of soft cast iron. Inattention to wheel
> torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

It is well known enough that it had to be done on purpose by the
$tealer.

I most certainly would bring the invoice with the mileage on it back to
the $tealer and be wanting free rotors, if not the install too.

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)

klutz wrote:
>
> My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> completing the repairs, I'm surmising that her driving style didn't cause
> the problem. While removing the lug nuts with a breaker bar, I felt a
> disparity in the effort required to loosen them. Hmmm. That can't be good.
> I wondered what the torque was on the other wheel, so I used a torque wrench
> to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F wheel!
> Just for safety's sake, I checked the rear wheels. Same sad shape. Torque
> was all over the map. Moral of the story - when the dealer is doing
> warranty work (power window) and asks if you want your tires rotated - tell
> 'em "No, thanks" - unless you can oversee the job. Incidentally, the old
> rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> spots. The pads have 5/16 of friction material left. My money says that
> the dealer's tire-jockey has caused me (and likely many others) to suffer
> from warped rotors. Intentionally, perhaps? Hard to prove. Word to the
> wise - the 2003 WJ has rotors made of soft cast iron. Inattention to wheel
> torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

125 ft-lb seems like a lot, too. What is the recommended value?

Earle
still top-posting

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43C167A1.9609B3E4@sympatico.ca...
> It is well known enough that it had to be done on purpose by the
> $tealer.
>
> I most certainly would bring the invoice with the mileage on it back to
> the $tealer and be wanting free rotors, if not the install too.
>
> 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)
>
> klutz wrote:
> >
> > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > completing the repairs, I'm surmising that her driving style didn't
cause
> > the problem. While removing the lug nuts with a breaker bar, I felt a
> > disparity in the effort required to loosen them. Hmmm. That can't be
good.
> > I wondered what the torque was on the other wheel, so I used a torque
wrench
> > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
wheel!
> > Just for safety's sake, I checked the rear wheels. Same sad shape.
Torque
> > was all over the map. Moral of the story - when the dealer is doing
> > warranty work (power window) and asks if you want your tires rotated -
tell
> > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
old
> > rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> > spots. The pads have 5/16 of friction material left. My money says
that
> > the dealer's tire-jockey has caused me (and likely many others) to
suffer
> > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
the
> > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
wheel
> > torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

125 ft-lb seems like a lot, too. What is the recommended value?

Earle
still top-posting

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43C167A1.9609B3E4@sympatico.ca...
> It is well known enough that it had to be done on purpose by the
> $tealer.
>
> I most certainly would bring the invoice with the mileage on it back to
> the $tealer and be wanting free rotors, if not the install too.
>
> 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)
>
> klutz wrote:
> >
> > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > completing the repairs, I'm surmising that her driving style didn't
cause
> > the problem. While removing the lug nuts with a breaker bar, I felt a
> > disparity in the effort required to loosen them. Hmmm. That can't be
good.
> > I wondered what the torque was on the other wheel, so I used a torque
wrench
> > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
wheel!
> > Just for safety's sake, I checked the rear wheels. Same sad shape.
Torque
> > was all over the map. Moral of the story - when the dealer is doing
> > warranty work (power window) and asks if you want your tires rotated -
tell
> > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
old
> > rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> > spots. The pads have 5/16 of friction material left. My money says
that
> > the dealer's tire-jockey has caused me (and likely many others) to
suffer
> > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
the
> > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
wheel
> > torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

125 ft-lb seems like a lot, too. What is the recommended value?

Earle
still top-posting

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43C167A1.9609B3E4@sympatico.ca...
> It is well known enough that it had to be done on purpose by the
> $tealer.
>
> I most certainly would bring the invoice with the mileage on it back to
> the $tealer and be wanting free rotors, if not the install too.
>
> 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)
>
> klutz wrote:
> >
> > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > completing the repairs, I'm surmising that her driving style didn't
cause
> > the problem. While removing the lug nuts with a breaker bar, I felt a
> > disparity in the effort required to loosen them. Hmmm. That can't be
good.
> > I wondered what the torque was on the other wheel, so I used a torque
wrench
> > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
wheel!
> > Just for safety's sake, I checked the rear wheels. Same sad shape.
Torque
> > was all over the map. Moral of the story - when the dealer is doing
> > warranty work (power window) and asks if you want your tires rotated -
tell
> > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
old
> > rotors and pads had 29,000 miles and wore evenly, with no glazing or hot
> > spots. The pads have 5/16 of friction material left. My money says
that
> > the dealer's tire-jockey has caused me (and likely many others) to
suffer
> > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
the
> > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
wheel
> > torque can destroy them in a heartbeat.

Re: Lug nut torque & warped rotors
 

95-110 off the top of my head.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Earle Horton" <NurseBustersNoSpam@msn.com> wrote in message
news:43c16c2c$0$10319$a82e2bb9@reader.athenanews.c om...
> 125 ft-lb seems like a lot, too. What is the recommended value?
>
> Earle
> still top-posting
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43C167A1.9609B3E4@sympatico.ca...
> > It is well known enough that it had to be done on purpose by the
> > $tealer.
> >
> > I most certainly would bring the invoice with the mileage on it back to
> > the $tealer and be wanting free rotors, if not the install too.
> >
> > 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)
> >
> > klutz wrote:
> > >
> > > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > > completing the repairs, I'm surmising that her driving style didn't
> cause
> > > the problem. While removing the lug nuts with a breaker bar, I felt a
> > > disparity in the effort required to loosen them. Hmmm. That can't be
> good.
> > > I wondered what the torque was on the other wheel, so I used a torque
> wrench
> > > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
> wheel!
> > > Just for safety's sake, I checked the rear wheels. Same sad shape.
> Torque
> > > was all over the map. Moral of the story - when the dealer is doing
> > > warranty work (power window) and asks if you want your tires rotated -
> tell
> > > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
> old
> > > rotors and pads had 29,000 miles and wore evenly, with no glazing or
hot
> > > spots. The pads have 5/16 of friction material left. My money says
> that
> > > the dealer's tire-jockey has caused me (and likely many others) to
> suffer
> > > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
> the
> > > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
> wheel
> > > torque can destroy them in a heartbeat.
>
>

Re: Lug nut torque & warped rotors
 

95-110 off the top of my head.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Earle Horton" <NurseBustersNoSpam@msn.com> wrote in message
news:43c16c2c$0$10319$a82e2bb9@reader.athenanews.c om...
> 125 ft-lb seems like a lot, too. What is the recommended value?
>
> Earle
> still top-posting
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43C167A1.9609B3E4@sympatico.ca...
> > It is well known enough that it had to be done on purpose by the
> > $tealer.
> >
> > I most certainly would bring the invoice with the mileage on it back to
> > the $tealer and be wanting free rotors, if not the install too.
> >
> > 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)
> >
> > klutz wrote:
> > >
> > > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > > completing the repairs, I'm surmising that her driving style didn't
> cause
> > > the problem. While removing the lug nuts with a breaker bar, I felt a
> > > disparity in the effort required to loosen them. Hmmm. That can't be
> good.
> > > I wondered what the torque was on the other wheel, so I used a torque
> wrench
> > > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
> wheel!
> > > Just for safety's sake, I checked the rear wheels. Same sad shape.
> Torque
> > > was all over the map. Moral of the story - when the dealer is doing
> > > warranty work (power window) and asks if you want your tires rotated -
> tell
> > > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
> old
> > > rotors and pads had 29,000 miles and wore evenly, with no glazing or
hot
> > > spots. The pads have 5/16 of friction material left. My money says
> that
> > > the dealer's tire-jockey has caused me (and likely many others) to
> suffer
> > > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
> the
> > > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
> wheel
> > > torque can destroy them in a heartbeat.
>
>

Re: Lug nut torque & warped rotors
 

95-110 off the top of my head.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Earle Horton" <NurseBustersNoSpam@msn.com> wrote in message
news:43c16c2c$0$10319$a82e2bb9@reader.athenanews.c om...
> 125 ft-lb seems like a lot, too. What is the recommended value?
>
> Earle
> still top-posting
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43C167A1.9609B3E4@sympatico.ca...
> > It is well known enough that it had to be done on purpose by the
> > $tealer.
> >
> > I most certainly would bring the invoice with the mileage on it back to
> > the $tealer and be wanting free rotors, if not the install too.
> >
> > 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)
> >
> > klutz wrote:
> > >
> > > My wife's 2003 Grand Cherokee fell victim to warped rotors, but after
> > > completing the repairs, I'm surmising that her driving style didn't
> cause
> > > the problem. While removing the lug nuts with a breaker bar, I felt a
> > > disparity in the effort required to loosen them. Hmmm. That can't be
> good.
> > > I wondered what the torque was on the other wheel, so I used a torque
> wrench
> > > to loosen the lugs. Torque varied from 80 to 125 lb/ft on the R/F
> wheel!
> > > Just for safety's sake, I checked the rear wheels. Same sad shape.
> Torque
> > > was all over the map. Moral of the story - when the dealer is doing
> > > warranty work (power window) and asks if you want your tires rotated -
> tell
> > > 'em "No, thanks" - unless you can oversee the job. Incidentally, the
> old
> > > rotors and pads had 29,000 miles and wore evenly, with no glazing or
hot
> > > spots. The pads have 5/16 of friction material left. My money says
> that
> > > the dealer's tire-jockey has caused me (and likely many others) to
> suffer
> > > from warped rotors. Intentionally, perhaps? Hard to prove. Word to
> the
> > > wise - the 2003 WJ has rotors made of soft cast iron. Inattention to
> wheel
> > > torque can destroy them in a heartbeat.
>
>