How to Change Your Spark Plugs Part 2 - Jeep 4.7L

The second video of a two part series: A quick tutorial on how to change your spark plugs in a 2005-2007 Jeep 4.7L V8. The principles apply to most gas engines, just access and location might be different.

Another few precautions when changing plugs on aluminum heads:

"When changing spark plugs, wait until the engine has cooled to remove the plugs. This is very important with aluminum cylinder heads because it reduces the risk of damaging the threads in the cylinder heads when the plugs come out (aluminum is a much softer metal than cast iron)."

"Most threads on spark plugs for engines with aluminum heads are either precoated to reduce the risk of thread damage, or the plug shell is made of a nickel alloy. If the plug shell is black or plain steel, however, you should put some antiseize to the threads, and reduce the applied torque by about 30 to 40%."

"Do not use antiseize if the plug shell is nickel or has been precoated. Antiseize acts like a lubricant and may allow too much torque to be applied to the plugs, damaging the treads in the cylinder head."
http://www.aa1car.com/library/sprkplg2.htm

Warning: I am not a professional and not held liable on any damages to any vehicle that you work on or have someone work on. This is only for demonstration purposes on how I have done work on my own vehicle and may have left out some critical information. Please refer to your dealer before performing any maintenance or work on your own.

Category:

Autos & Vehicles

Tags:

• Jeep
• 4.7L
• V8
• How
• to
• change
• spark
• plugs
• 2005
• 2006
• 2007
• WK
• Grand
• Cherokee
• Commander

[Radhyfication]

I want to ask a question.. Is it important to change the spark plugs??? Or not??

[jbrunsonjr]

@Radhyfication Just imagine wearing the same pair of shoes for 10 years every day. That's about the best comparison I can think of. It definitely will help your fuel economy and keep that engine running smooth...

[SouthBay4D]

@dmera420 what sound clued you toward the exhaust manifold leak?

[jbrunsonjr]

@SouthBay4D - It's not too pronounced in the video, but there is a definite sound of exhaust leaking from one or two cylinders in person, especially from the driver's seat. At some point I'll fix it and show it on ye ol youtube...

[Ar15snhappy]

wish you showed us how you got to the back ones

[jbrunsonjr]

@Ar15snhappy Sorry about that - it ended up taking a mix of extensions and u joints to get them out, especially the passenger side rear. What a pain!

[dolata000]

I wanted to see you get out #8... the one buried under the firewall on the passenger side. #7 is bad, but as far as I can tell, #8 requires a trained double jointed pygmy monkey with special tools...

[Dragnet000]

@wafrederick You're right! Bosch sucks (my poor chrysler 300M could say it) : (

[wafrederick]

Take them autolites back and get champions.Champions are the best for Chrysler products.Don't ever install Bosch in a Chrysler product call run like crap and a missfire code will appear.I see more problems with Bosch plugs

[MrJustin5687]

Do you have to torgue down the plugs or just make them snug..?

[wiley0714]

I kept my old plugs for next Halloween......Happy Halloween kids....hahah used plugs....fun fun....

[wiley0714]

Wondering if the "die electric grease" goes on top of the plug, where it goes to that coil pack?

Also do you know what torque the plugs should be in at? foot lbs?

[kd4dlu]

Nice video. I had a manifold leak, on my 05 4.7,as well. It was the driver side. I went ahead and got the hardware for the whole side. There are a couple different types of bolts for this. Once I got manifold off, I found that the back two bolts were sheared off. Fortunately I was able to get a pair of vice grips around the heads, and didn't need a back out kit to get them off. It took the better part of a day to get everything off, and back on again. The worse part was getting to the manifold!

[Radhyfication]

@jbrunsonjr

You're right..But can you tell me when I have to change the spark plugs??

Aftet two years or three years??

And thank you for helping me ..My appreciate...