Its really simple Stone... I'll post up a few pics tomarrow... but yeah basically you just use a socket wrench to remove the bolt holding the ignition coil on and then use a socket wrench with a spark plug socket to remove the plugs and simply replace them all...

hm... I haven't seen that spark plug pic with the gapper... I'm actually very confused on where I got .35 from now... I could have sworn it said .35... but I just checked and your right it does say .42...
... Oh Well... [sm=oopssign.gif]

 

I noticed in th manual extract above it shows NGK plugs. Is the gap different for each plug/plug manufacturer or should all plugs from all manufactures use the same gap? I used to use the NGK "hot U" plugs in my old KZ1000 and could really feel a difference from other plugs.

 

Again, the oem plug (NGK) calls for a gap of .040. The recommended gap for the colder Autolite 3923 is .035. This is what I set mine at andmy truck('05 3.7)runs great, much smoother idle.

 

All plugs should have the same gap as OEM specs IF they are the same heat range. When you change the heat range you will probably want to use a different gap.

 

Oaky... so its not my Bad... LOL...

 

Just to add a bit more to this, interestingly enough I spoke with Autolite on the phone today. For using the 3923 in the 4.7L V8 they recommend a gap of .040, same as Dodge recommends. However for the 3.7L V6 they recommend .035 as luvmydak said already. I'm not sure why their recommendation matches OEM for the 4.7 but not for the 3.7.

Another interesting thing is that according to autolite, the recommended plugs for the 4.7 are the 3924's so going to the 3923's gets a little cooler heat range. The interesting part is that the recommended plugs for the 4.7 HO are 3922's which are cooler than the 23's. I'm wondering if the 22's might work even better on a 4.7 with aftermarket cams since the only difference for the HO is a different camshaft right? (Here's hoping superdak chimes in on this, I'd love to hear your thoughts about it)

 

i would stick with the 3923's but thats just me i've had them in my truck for a while and i like them better than the stock ones...it doesn't idle so rough and runs smoother!!

 

The perfect heat range depends on your specific driving style as well as quality of gasoline.
Hotter plugs will resist fouling because deposits tent to burn off better.
A higher voltage spark allows wider gap. Modern electronic ingition is much more tolerant of wider gaps. .035 or .040 will probablt not make a noticable difference. In theory, a wider gap will allow better fuel ignition but it would be surprising if anyone could detect a difference of .005" in either performance of mileage.
I think somebody on this thread should do the research...

 

I agree about the Research... but....

NOT IT!!!

 

Yup, it's a great idea so I guess I'll.....






NOT IT!