I want to replace my spark plugs in my 04 hemi. I'm hoping to get some power back and possibly better fuel mileage. My truck has the original plugs with 253,000 miles on them. How can I prevent them from getting stuck and breaking off? All help is appreciated
As a precaution, I would drop some penetrating oil down each spark plug hole before you break them loose and then I would put a little more down each hole.
If you damage the threads on a head, there are a few taps available at the local auto parts stores and even spark plug thread heli-coils if they get that bad.
Take your time and you will be fine. I just went through a 2006 Ram 1500 5.7 HEMI that was traded in that never had any maintenance performed.
The truck still had the original plugs at 197,000 miles and I was able to get them out without damaging the threads. After I removed all of the original plugs I did chase the threads with a tap just to make sure.
I recommend sticking with a copper spark plug on your 5.7 HEMI. Platinum plugs have been known to cause some issues.
The stock original spark plugs are Champion RE14MCC4 and the auto parts stores have them under Champion #570's. If you look at the numbers on the porcelain you will see the RE14MCC4.
