Having problems with your Jeep Grand Cherokee ?

2007 Jeep Grand Cherokee Overland

\015 Changed the spark plugs for the first time yesterday and found something very interesting. I purchased this vehicle used from a reputable jeep dealer in my area about one year ago. Certified used. A few weeks ago the check engine light came on. When I fished out the code it was for a misfire. I thought it might have been a fuel quality issue, so I started using premium fuel. That corrected the problem, I thought. I asked the dealer what they would charge to change the plugs. They said about three hours labor (at $105.00/hr) plus the cost of the spark plugs. No way am I going for that, so I start changing the plugs yesterday, passenger side first, on the 5.7 hemi. Not a bad job provided you have a fair array of tools and extensions. No problems noted on the passenger side, although I must say that I have absolutely no love for Champion spark plugs, and haven't since I started fixing cars back in the 60's. I purchased motorcraft platinum plugs, against the advice of many who say to stick to the stock copper core plug. Well, when I reached the left vehicle side, the first and second cylinders had spark plugs that were so loose that I removed them by hand. No ratched needed. Just twisted the extension out by hand. I really wasnt too surprised considering that these two cylinders were the toughest to get to. You need a magnetic spark plug socket, a double 3/8" drive universal, and a 12" extension to get those bad boys out and put them back in, and tighten correctly. I might mention that a good shot of dielectric grease inside the plug boot was strongly recommended by all of the procedures that I've read prior to doing this job. Also what was recommended was to put some antiseize compound on the threads, which I also did. My jeep runs beautifully. The engine sounds like a different engine. Much quieter than before, it also seems to have a bit more power, probably because of no compression loss due to loose plugs. The moral of the story? Be careful who you let work on your car. It seems you can't trust anyone anymore, even when you're willing to pay good money to have work done. Corner cutting seems to be the norm today in every walk of life. No one is concerned with doing a quality job today. Thank goodness I can still fix my own cars, and can still justify the cost of a garage full of tools to my wife. Hope this helps all who read it. Good luck\015 Posted / edited by AnonymousUser on : 18-06-2018

Answers :

Sounds like some good advice
Repair Help & Product Troubleshooting for Jeep Grand Cherokee

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