what are the best spark plugs for the 5.4 3v?
#50
#54
Yes. I'm not going to use a spark plug socket either. They're are sp515s, they will come out easier than these original 102k mile plugs. I have regular anti-seize and copper, I'm not buying anything more. love you buddy. no homo.
#55
The real reason you should NEVER use copper on the sleeves is the stuff is Death to the O2 sensors - it WILL migrate from the chamber and Kill yer O2's in very short order.
Once you destroy the front pair, you can kiss yer closed loop A/F control goodbye - along with yer power, mileage and possibly yer cats.
Save $20 now - spend $200+ shortly thereafter, on new O2's ( there are 4 ) - plus labour if you don't change them yerself. And no - despite my reputation, I am not chittin' you.
MGD
#56
I can't find anything via google saying that. Why would copper kill them, and not regular anti seize or nickel?
#58
I've never heard that copper anti-sieze was death to O2 sensors either. In fact, I installed a set of Bosch sensors a few years back that had a packet of copper anti-sieze for the threads. I did a quick google search too and didn't see anything about copper vs O2 either, but am willing and desirous to learn and save myself a mistake later. Silicone is the one quick O2 sensor killer I know of... but copper?
That said, and possible O2 problems aside, I wouldn't use copper on the plugs either for the temp differences alone and the unknown risks in using something not spec'ed.
That said, and possible O2 problems aside, I wouldn't use copper on the plugs either for the temp differences alone and the unknown risks in using something not spec'ed.
#59