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post #826 of 2220 Old 02-14-2011, 01:38 PM
1stblack97ZJ
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Quote:
Originally Posted by SplitNail View Post
Okay sweet deal. Thanks for all the info. What is a good compression reading on the 4.7l?
No problem man.

Someone else will have to answer that one, I've never owned anything with the 4.7L, but I can check my haynes manual later and find out if no one answers.


1997 ZJ Laredo
4" Lift
32s
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post #827 of 2220 Old 02-14-2011, 01:50 PM Thread Starter
SplitNail
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Okay no worries. I I'll look around.

Here is the spark plug. Any comments??


1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #828 of 2220 Old 02-14-2011, 01:53 PM
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that plug looks pretty decent.

Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

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post #829 of 2220 Old 02-14-2011, 01:56 PM Thread Starter
SplitNail
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Should i replace them?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #830 of 2220 Old 02-14-2011, 01:58 PM
tsconver
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4.7 should be using the platinum tip plugs is that a platinum plug, does not look like it, never hurts to replace them.

Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo


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2001 Kawasaki 1200 ZRX
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2006 Red Liberty
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post #831 of 2220 Old 02-14-2011, 01:59 PM Thread Starter
SplitNail
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Quote:
Originally Posted by tsconver
4.7 should be using the platinum tip plugs is that a platinum plug, does not look like it, never hurts to replace them.
I have always heard use the champion copper cores...

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #832 of 2220 Old 02-14-2011, 02:02 PM
1stblack97ZJ
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No oil deposits on the plug, thats good. Looks just like normal wear. Do you know how many miles are on them?

1997 ZJ Laredo
4" Lift
32s
Plenty of lights
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post #833 of 2220 Old 02-14-2011, 02:03 PM Thread Starter
SplitNail
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Quote:
Originally Posted by 1stblack97ZJ
No oil deposits on the plug, thats good. Looks just like normal wear. Do you know how many miles are on them?
20k. I'm gunna go ahead and replace them. Just cause. Where could the oil be going then?

That's also just on cylinder. We will see what happens.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #834 of 2220 Old 02-14-2011, 02:08 PM
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Yep, check all the cylinders and see if there is oil on any of them, and yeah, I would replace them just cause too lol

1997 ZJ Laredo
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32s
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post #835 of 2220 Old 02-14-2011, 02:21 PM Thread Starter
SplitNail
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Quote:
Originally Posted by 1stblack97ZJ
Yep, check all the cylinders and see if there is oil on any of them, and yeah, I would replace them just cause too lol
Okay, I got new plugs. About to see what the compression is. In scared.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #836 of 2220 Old 02-14-2011, 03:59 PM Thread Starter
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Compression isn't looking good.

1-100
2-125
3-80
4-125
5-115
6-125
7-125
8-87

This is starting on the passenger front and going clock wise and ending front driver side.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #837 of 2220 Old 02-14-2011, 04:43 PM
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Ah man that sucks...

~ 04 WJ Overland 4.7 HO | Graphite Metallic | Quadra-Drive | Vari-Locks | Bilstein 4600s | ADDCO Sway Bar | Powerstick Exhaust | RB1 | SuperChips Tuned | Much More to Come ~

~ 04 WJ Laredo 4.0 | Selec-Trac | MBP | OME HD 3" Lift | JKS TB | IRO Front LCA's and UCA's| Bilstein 5100's | Silent Armor 245/70/17's | Custom Front D.S. | Stillen Rotors/Pads | Tow Package w/ 3.73's | Moog HD Steering | Kenwood eXcelon HU | Alpine Speakers, Amps, and Subs | Bilstein SS | Auxiliary Transmission Cooler | Rock Lights | Light Bars | Lots of Cool Stuff ~

~ 05 Rubicon Unlimited 4.0 | 6-Speed | Dana 44's | Air Lockers | 4.11 Gears | Rock-Trac 241OR T-Case with 4:1 4-Low | OME HD Springs | Bilstein 5100s | 245/75/16 Kevlar MT/R's on Moabs | Hansen Offroad Steel F/R Bumpers | Warn 9000xi Winch | Edge Performance Chip | Custom CAI | Hella Off-road Lights | Cobra 29 CB | Flash Lights | Recovery Gear | Fire Extinguisher ~

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-Michael-
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post #838 of 2220 Old 02-14-2011, 04:46 PM Thread Starter
SplitNail
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Quote:
Originally Posted by snobrdrkid07
Ah man that sucks...
Yea, I'm gunna go grab a can of restore and see if that helps.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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post #839 of 2220 Old 02-14-2011, 06:09 PM
1stblack97ZJ
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Did you find out what the compression is supposed to be?

1997 ZJ Laredo
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post #840 of 2220 Old 02-14-2011, 06:40 PM Thread Starter
SplitNail
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140-180.... I'm way off.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids


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