K & N Air Intake Kit
#21
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ok let me start off with the basics. the 4.7L has aluminum heads so youll have to buy anti seze and apply it very lightly to the plug being careful not to get it on the electrod this could cause a missfire. then i would get champion plat or iridum plugs. then buy new boots for your coils and make sure to put dialectiric greese inside of the new boots just enough to coat the inside of them. if you still have mpg problems i would start looking at replacing the cat and o2 senors since a bad cat can ruin them and could even come apart clogging your muffler. just a few ideas. dont go cheap 100 to 500 is still cheaper than an engine, espcially a 4.7L
#22
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yes you can reach them from the top, and of course you need to torque them down, i just dont have the specs on hand, i have never used anti-sieze on spark plugs but if you want to go ahead, the boots of the coils dont need to be replaced unless you want to, or they are cracking/dry rotting (i have never replaced mine)
#23
#24
#26
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The 4.7L have aluminum.
Here is your torque: 41 N·m (30 ft. lbs.) for iron heads.
I see what your saying but if you use a anti-seize you need to use one that is for electrical (spark plug anti-seize). For me I never use it because I don't over torque them down and I replace them once a year anyway so they never have any time to rust not to mention....IMHO.... I don't think you get a very good connection with a anti-seize in between the connections, but again that's my opinion. Now on a spark plug that lasts a long time I might think about it however I would assume that after 60k-100k miles it would be burned off anyway!
Last edited by hydrashocker; 08-27-2010 at 04:50 PM.
#27
#28
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#30
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N·m (20 ft. lbs.) torque.
As for restrictive, Cam's are not restrictive as they only operate the valves which in turn are the heads. The most restrictive part would be the heads......IMHO