Reddit mentions of GEARWRENCH 3 Pc. 3/8" Drive 6 Pt. Magnetic Swivel Spark Plug Set - 41740D

I just got an 08 WK Limited 5.7 with 51k on it. Here is what I did immediately, I have the previous service records and it seems as though some of the work may have been done, it wasn't 100% clear and I just wanted to know a baseline.

Replace PCV Valve (cheap part, just unscrews by hand to replace, super easy), Clean Throttle Body (remove air box, remove throttle body, clean with ONLY isopropol alcohol and a clean rag) and install Billet Technology (or equivalent) Catch Can. This is all done because the PCV system on the Hemi basically sucks, you'll see when you remove the throttle body that it will most likely be gunked up, the PCV lets too much oil through. This is cured with the catch can. Immediately helps throttle response and minor hep to fuel economy.

Replace MAP Sensor. Honestly not really sure why, all the forums say do it, it's a $20 part and basically pop-out, pop-in replacement. A little tricky to get your hand in behind the manifold the get it, takes some maneuvering but be patient, you'll get it. Said to have positive effect on fuel economy.

Replace EGR Valve. This can be tricky as the alternator blocks one of the bolts. Many people will tell you to cut the bolt and install a new shorter one. This seems like a lot of extra work to me. I just removed the belt (easy to do) and unbolted the alternator (2 bolts). This took me all of about 6 minutes to do, then the new EGR (and new gaskets) just bolt back on.

While I had that off I replaced the serpentine belt. Cheap enough, and why the hell not, now I know exactly ow old it is. While you're in there check all your pulleys, tensioner, etc. Make sure they move smoothly and quietly. I forgot this step and I DID have a squeak I wanted to address. I still have said squeak. Next nice day I'm gonna get back in there and check.

Spark plugs. I have an 08, so it wasn't hard. Unbolt each coil, gently crack the plugs with a ratchet (I have a great plug ratchet set I'll link below, get it, it will help with all your plug changes on any deep well hemi). Change your plugs. I got the Champion 57- Copper core generally the recommended plug), dab of dielectric on the end (no anti-size, I don't like it, I change plugs every 30k so I shouldn't need it, some say anti seize leads to accidental over-torque, personal preference I guess). Gap plugs to .44 and torque to 13ft.lbs.

Next I did K&N drop in air filter, swapped my air resonator for a SRT Inlet tube (take off, bought online for $20 shipped, search the STR forums for the for sale items) and extended the drain hole for more air inlet. Sounds great, that throaty cold air intake everyone loves without the risk of slurping up some water and hydro locking. Be sure to perform regular main on the filter, clean and il it as required by the spec.

Oil change. Mobil 1 Synthetic, 5w-20 & Mopar filter. Because oil change....

I also installed the fumoto quick valve to change my oil easier. It scares some people, I looked it over and feel confident that it will not open accidentally, it has a decent spring type safety.

I plan to soon flush and fill tranny, radiator, transfer case & differentials. After that is all done I may swap out a few more sensors. IAT, O2, Crank Position, etc. With all that complete I will feel as confident as I possibly can in the maintenance of my Hemi.

I may point out that i'm not really mechanically inclined. I have just been doing a lot of research on forums (jeepgarage, cherokeesrt8, jeepsunlimited, etc) I founds lots of good write ups, reviews and information. Take you time, do your research and everything will be there.

Generally my truck runs smoother, quieter, more powerful and a little better MPG. It's only been about 100 miles since I did all this, but for the overall $$ I spend (under $400) it was totally worth it. At a dealer my guess is this is like 1500 worth of work. Below are some links. Have fun.



Tune up kit
http://www.amazon.com/GRAND-CHEROKEE-COMMANDER-5-7L-HEMI/dp/B003ZW9EUM

Spark Plug Tool
http://www.amazon.com/KD-Tools-3-Piece-Magnetic-Universal/dp/B000NIEECO

Fumoto Oil valve
http://www.fumotousa.com/parts.php?partname=F106N&partnumber=33

Spark Plug Change Tutorial
http://www.jeepgarage.org/f156/diy-hemi-5-7l-spark-plug-change-50750.html

EGR (I didnt follow exaclt, i just removed alternator, this shows all steps including cutting botl. You choose your own adventure here...)
http://www.jeepsunlimited.com/forums/showthread.php?516169-DIY-how-to-install-a-new-EGR-w-pics&highlight=egr%20valve

PCV Valve
http://www.jeepforum.com/forum/f67/changing-pcv-valve-1336134/

Throttle body cleaning
http://www.jeepforum.com/forum/f67/throttle-body-cleaning-tips-1342502/index2.html

MAP Sensor (start at post #8 in this thread, thats where the good info starts, but feel free to read from beginning if you want)
http://www.jeepforum.com/forum/f67/5-7l-map-sensor-location-1340713/

And for ALL the info on your WK, use this site as your bible.
http://wkjeeps.com/

Hope this helps a bit!!!