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Unread 10-26-2014, 04:00 PM   #1
rvjon
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Join Date: Sep 2013
Location: bremerton, wa
Posts: 26
worn brakes

After having to replace my spark plugs,coils and wires at 49K miles to try to take care of an intermittent stumble and it not working,I was wondering why I had to replace the plugs that soon. Yes,they were worn. Now at 58K I had to replace the brakes as there was 8mm on the front and 2mm on the back.Yes,I did have them checked at several different shops. It really seems to me that this isn't right. I know that this rig has an automatic braking system like a an engine brake and a tech says that it works on both the engine and the brakes,so I'm wondering if this caused the rear brakes to wear out to fast or are they just cheap brakes.
I also seem to be needing a new muffler and have an oil leak somewhere. After driving my '94 Cherokee Sport with NO problems for four years and 125K miles commuting 90 miles a day and a lot of 4X4 off road with NO trouble,I was expecting a really trouble free rig with this Liberty. Nawp....

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Unread 10-26-2014, 06:19 PM   #2
RENE65
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2008 KK Liberty 
 
Join Date: Dec 2011
Location: LAVAL, QUEBEC
Posts: 218
Rear brakes do wear faster in the rear,rear brakes is not uncommon at 60k or even less.
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Unread 10-26-2014, 08:07 PM   #3
Bmxer524
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2011 KK Liberty 
 
Join Date: Aug 2011
Location: Lindenhurst, NY
Posts: 1,205
Rear brakes normally go first because we're rwd(unless in 4wd). Tcs uses the brakes to control tire spin, so naturally the rear spins more.

Plugs are supposed to get changed every 30k miles.

What makes you think you need a new muffler?

Also it might be the crank seals. They're fairly common for the 3.7. I just had my front crank seal replaced on my 2011 with 41k miles.
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Unread 10-27-2014, 08:49 AM   #4
tommudd
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2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Moshi Tanzania, Ohio/Tanzania
Posts: 4,464
Quote:
Originally Posted by rvjon View Post
After having to replace my spark plugs,coils and wires at 49K miles to try to take care of an intermittent stumble and it not working,I was wondering why I had to replace the plugs that soon. Yes,they were worn. Now at 58K I had to replace the brakes as there was 8mm on the front and 2mm on the back.Yes,I did have them checked at several different shops. It really seems to me that this isn't right. I know that this rig has an automatic braking system like a an engine brake and a tech says that it works on both the engine and the brakes,so I'm wondering if this caused the rear brakes to wear out to fast or are they just cheap brakes.
I also seem to be needing a new muffler and have an oil leak somewhere. After driving my '94 Cherokee Sport with NO problems for four years and 125K miles commuting 90 miles a day and a lot of 4X4 off road with NO trouble,I was expecting a really trouble free rig with this Liberty. Nawp....
Traction control is the main reason for early brake wear. Anytime the rear starts to spin, it gently applies brakes to that wheel to gain traction with the others ( in a very simple way of explaining ) So more wear. For example on my KJ ( without any of that electronic crap) I have done one brake job in 209,000 miles.
As far as plugs they need to be changed every 30,000 miles or so with a good copper core plug, nothing else cheap and easy to do .
Not sure on muffler but should not be needing to be replaced, I know of several that are double/ triple that mileage and stock exhaust yet
Do you ever wash up under it ?
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Unread 10-27-2014, 10:11 PM   #5
rvjon
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Join Date: Sep 2013
Location: bremerton, wa
Posts: 26
I checked the underside while it was up in the air getting the brakes done and everything looked good,excpt that I found evidence of the oil leak,but since it had been raining pretty hard on the way to the brake shop it was hard to determine the exact location. Yes, I do wash it underneath on occasion and no,they don't saly our roads here in the beautiful PNW.
The muffler is starting to sound very raspy,not throaty but raspy.
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