1st Gen SRT8-Specific Performance & Engine/Intake/Exhaust ModsThis section is for topics related to SRT8 performance & performance mods. For non SRT8-specific topics, please post in the All Models Forums.
I have never changed the spark plugs on my previously owned 06 SRT-8 since I bought it. I have put 85,000 miles on it. I can't find video on a step by step process or online manual for step by step process. Does anyone have anything I can use or I'm I getting over my head and should take to a mechanic. I know I have 16 spark plugs and OEM calls for NGK spark plugs. Any help would be appreciated. thank you
Daniel Reyes Jr.
Black 2006 Chrysler 300C SRT-8
with new Mopar one peice front bumper
So Steve could some look more worn than others? Or will the first one I take out and look at look like the last one I take out. I was thinking if I take out one and it looks good, the other should be simular and I can leave alone. I'm not having any problems but I know it well past due.
A good indicator is your gas millage. If you notice your mileage really getting bad a plug change may help you. 15K miles isn't far off the spec. I've had 100k mile plugs before & they seldom do last 100K miles before needing replacement.
However if you not having problems I'd leave them. Maybe buy now so you have them later.
You can't tell if the imbedded conductor is cracked, you can't tell if the insulator is cracked and it's hard to tell if the side electrode is in good condition (dielectric cracks or crazing) and at 85K, I'd seriously consider replacing them even though they are touted as 100K mile plugs. Fuel quality, intake contaminants and other factors are the real determining factor, not some engineer's expectation on life.
When the spark plugs use a single or double platinum tips and they have a recommended service life of 100,000 miles for normal driving conditions per schedule A in this manual. The spark plugs have a recommended service life of 75,000 miles for severe driving conditions per schedule B in this manual. A thin platinum pad is welded to both or just the center electrode end(s) . Extreme care must be used to prevent spark plug cross threading, mis-gapping and ceramic insulator damage during plug removal and installation.
Spark Plug Removal:
1. Remove necessary air filter tubing at throttle body.
2. Prior to removing ignition coil, spray compressed air around coil base at cylinder head.
3. Prior to removing spark plug, spray compressed air into cylinder head opening. This will help prevent foreign material from entering combustion chamber.
4. Remove spark plug from cylinder head using a quality socket with a rubber or foam insert. Also check condition of ignition coil o-ring and replace as necessary.
5. Inspect spark plug condition.
Spark Plug Install:
Special care should be taken when installing spark plugs into the cylinder head spark plug wells. Be sure the plugs do not drop into the plug wells as electrodes can be damaged.
Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap or a cracked porcelain insulator.
1. Start the spark plug into the cylinder head by hand to avoid cross threading.
2. Tighten 5.7L spark plugs to 18 N∑m (13 ft. lbs.) torque. Tighten 6.1L spark plugs to 15-20 N∑m (11-15 ft. lbs.) torque.
3. Before installing ignition coil(s), check condition of coil o-ring and replace as necessary. To aid in coil installation, apply silicone to coil o-ring.
4. Install ignition coil(s).
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