Jeep Garage  - Jeep Forum

Jeep Garage - Jeep Forum (
-   Grand Cherokee - WK (
-   -   new plugs in and... (

jeep5.7 07-24-2011 07:37 PM

new plugs in and...
:thumbsup:well i finally got up enough courage and changed the plugs today and all i can say is holy s**t what a difference,wow,i drove for about 30 miles and instantly got 2 mpg now im at 14,and a huge power gain,also the mds is so much smoother,i believe they were original at 54,000 mi,

THANK YOU JG AND EVERYONE FOR ALL THE INFO,without all your guys help i wouldnt of been able to do it,saved me 470.00$,more money for mods

Chaoul1 07-24-2011 07:45 PM

Re: new plugs in and...
Nice Job man! What type of plugs did you use? 570 Champions?

jeep5.7 07-24-2011 07:48 PM

Re: new plugs in and...
yes the 570s with a .45 gap

remmy 07-24-2011 07:52 PM

Re: new plugs in and...
Hmmm... whats the process? I might do it while changing the pump

jeep5.7 07-24-2011 08:02 PM

Re: new plugs in and...
just take your time,undo the sensor clips by squeezing and pulling up,then use a 10mm socket for the coils,dont take the screws all the way out,pull up gently and the two boots will come off the plugs,take the socket and you will need a 9,6,and three inch extension depending on which plug your taking off,i used a piece of 3/8 fuel line to take the plugs out and to put back in to avoid cross threading,put a dab of antiseize on,dont overtorque,12-14 lbs,reinstall coil and sensor,do one at a time,the driver front and right rear are the hasrdest but do able,gap to .045,do it on a cold motor only

08pretaco 07-24-2011 09:44 PM

Re: new plugs in and...
got pics of the old plugs?

jeepgcoman 07-24-2011 11:21 PM

Re: new plugs in and...

Be sure to read the "Installation Tips" about half way down the page. DO NOT use anti-seize on NEW plugs. If you take them out and reinstall the same ones.....then yes, a little dab will do ya.

If you're using NGK's like me, here's their reference and reasoning:

jeep5.7 07-25-2011 11:42 AM

Re: new plugs in and...
ya ill take a few today,and i did use a little antiseize on mine because there was nothing on the new ones,just a tiny dab

jeep5.7 07-25-2011 01:01 PM

Re: new plugs in and...
sorry for the crappy pics it was raining

dmsfun 07-26-2011 03:26 PM

Re: new plugs in and...
One more thing that makes a big difference with the Hemi is remove and clean the TB, then put in a CC to keep things clean. This really wakes up the 5.7 as the TB gets covered in baked on gunk, and throttle response suffers.

All times are GMT -5. The time now is 06:17 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community