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Unread 07-29-2013, 07:35 PM   #1
cargo33
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two Qs on sparks plugs wires and motor mounts

Well I know plenty on jeepimg an mechanics but by no means am I an expert so this these questions might sound stupid but ive just never herd an answer. How often should u change yor spark plug wires an plugs and what is the purpose of adding a one inch motor mount lift?

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Unread 07-30-2013, 12:44 AM   #2
jnicewan
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Spark plugs depend on type, it would help to know what Jeep you have and engine size. Most of the OEM plugs are copper so those would be changed every 30K miles. Plug wires dont really have an interval, they are usually replaced as needed or desired. Unless you want to replace them or have a problem I would say they should last 100-150k miles. Most people replace them for general maintenance reasons or doing a full tune-up (plugs, wires, and if applicable a cap & rotor)

Motor mount lifts are usually used to correct driveline angles after a susp lift was installed or just to try to help a driveline vibration. They can also be used to help position the cooling fan in the shroud after a body lift but thats not typical.
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Unread 07-30-2013, 06:55 AM   #3
cargo33
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Very helpful. I feel like I just learned something. Thankyou
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Unread 07-30-2013, 07:09 AM   #4
cruiser54
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At the dealerhsip, we changed plugs, wires, cap, and rotor every 30,000. Wires weren't required until 60,000 but sure as shooting they would fail just shy of that so we shortened up the interval to 30,000.
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Unread 07-30-2013, 07:17 AM   #5
cargo33
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Does the cap an rotor fail often cuz ive never had em fail on my stuff b4. Ive replaced em on a chevy an a dodge but I hvnt on my jeep. The reason im asking about that is my jeep is at a lil over 100000 miles an its a tj. An I typicaly maintain most of my stuff. Bjt ive never really herd a rule on this sort of thing
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Unread 07-30-2013, 07:33 AM   #6
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Does the cap an rotor fail often cuz ive never had em fail on my stuff b4. Ive replaced em on a chevy an a dodge but I hvnt on my jeep. The reason im asking about that is my jeep is at a lil over 100000 miles an its a tj. An I typicaly maintain most of my stuff. Bjt ive never really herd a rule on this sort of thing
Yep. Use a good replacement with brass, not aluminum contacts.
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An index to over 25 write-ups can be found in Post #1.

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Unread 07-30-2013, 07:54 AM   #7
vadslram
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Cap and rotor fail before the wires.
Think of an arc welder. Since the rotor never actually touches the contacts in the cap the spark has to jump a gap. Every time it does it takes molecules of the rotor and sends them into the air and on to the cap post.
It isn't 100% efficient because some molecules stay in the air and bit by bit you are metal coating the interior of the cap and widening the gap between contacts. Eventually there will be enough conductive dust on the cap and a wide enough gap to make it easier for the spark to run everywhere but the plug you intended.
I check the cap/rotor every year and change it regardless at 2 yrs. It is a cheap way to keep perfomance and economy up.
Wires will wear out too but they usually go because of abuse. Pulling them off the plugs will stress the inner conductor and create more resistance.
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Unread 07-30-2013, 07:58 AM   #8
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Quote:
Originally Posted by vadslram View Post
Cap and rotor fail before the wires.
Think of an arc welder. Since the rotor never actually touches the contacts in the cap the spark has to jump a gap. Every time it does it takes molecules of the rotor and sends them into the air and on to the cap post.
It isn't 100% efficient because some molecules stay in the air and bit by bit you are metal coating the interior of the cap and widening the gap between contacts. Eventually there will be enough conductive dust on the cap and a wide enough gap to make it easier for the spark to run everywhere but the plug you intended.
I check the cap/rotor every year and change it regardless at 2 yrs. It is a cheap way to keep perfomance and economy up.
Wires will wear out too but they usually go because of abuse. Pulling them off the plugs will stress the inner conductor and create more resistance.
Well stated, and true. Replace it all every 30,000 miles and keep things in tip-top shape.

We've had threads started on JF lately dealing with driveability issues and after exhaustive efforts the OP found a dizzy cap had issues.
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Unread 07-30-2013, 08:05 AM   #9
cargo33
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Well I prolly ot to do all that then. Like I said I done it on sum other stuff. Is it very tuff on my tj. It the 6cyl
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Unread 07-30-2013, 06:11 PM   #10
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Well I prolly ot to do all that then. Like I said I done it on sum other stuff. Is it very tuff on my tj. It the 6cyl
So easy I can do it.
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If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

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Unread 07-30-2013, 06:19 PM   #11
cargo33
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Lol that easy huh
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Unread 07-30-2013, 06:26 PM   #12
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Lol that easy huh


Yep. Did I mention with one hand and blindfolded? LOL.
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Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

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Unread 07-30-2013, 06:37 PM   #13
cargo33
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Well I suppose il have to try it that way then an since I make everything harder than it needs to b il also do it hopping on one foot
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Unread 07-30-2013, 06:46 PM   #14
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Well I suppose il have to try it that way then an since I make everything harder than it needs to b il also do it hopping on one foot
You're catching on. Do one at a time and take your time.
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If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

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Unread 07-30-2013, 07:18 PM   #15
cargo33
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Even tho I know this thread has nothin to do with lights I just bot 4 new ones off craigslist for $50. I just put on my light bar an am about ready to go throw it on. Just excited an had to tell someone lol
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