![]() From what I've read, the Autolite is the manufacturer for Motorcraft, and are also two piece. Despite what you'll read in some ill-informed posts, the Motorcraft replacement plugs are still two piece. Now that all that's out there, on to the replacement plugs. NOTE, THERE IS SOME CONTROVERSIAL INFO IN THIS SECTION: The penetrant used to perform the TSB (Motorcraft carb cleaner in the TSB) can be substituted with others, PB Blaster tends to be a favorite on the forums.Īlthough I haven't seen any evidence that it definitely works, a lot of guys will use a combustion chamber cleaner like Seafoam in the weeks leading up to the change in an attempt to remove some of the carbon (I am a Seafoam user). Prices vary, my Ktool kit was around $60 for both at. Several companies make the tools: Rotunda (Ford OEM), Snap-on, Lisle, Ktool, etc. It is highly recommended to have both extraction (electrode and porcelain) on hand. These quotes can range from $270 with no broken plugs, to upward of a grand with all 8 broken (unlikely)Ī number of members have followed the TSB and successfully removed and replaced their plugs. As you can see, this is different than the actual Ford "book" values of:īase spark plug removal: 1.4 hrs Warranty / 2.2 hrs Standardīroken plug extraction: Actual hours worked Read it in full text with pictures and diagrams here: ĭealer's have figured out that the spark plugs break, and you'll find most members here get quotes to change their plugs of a flat amount + an amount per plug. The TSB has been revised a few times, and has become TSB 08-7-6. Over the years, Ford has developed a Technical Service Bulletin (TSB) to instruct techs on the best way to remove the plugs without breakage. Unfortunately the new plugs require the new heads, and as such are not backwards compatible. Ford changed the plug and head design starting with the 11/30/07 engine build date, correcting the issue. When you remove the plug, the torque breaks the lower piece off. Carbon deposits develop between this lower shaft and the surrounding head, locking the lower piece in place. The culprit is a specially designed spark plug (and the head that recieves it) that is commonly referred to as a "two piece" plug, due to the lower shaft that is crimped to the body of the plug (the broken piece in the above picture). I'll try to stick to the facts, with a short "IMHO" section at the end.įor those of you wondering why a simple spark plug change gets so much attention, imagine starting a plug change and ending up removing plugs that look like this after hours of labor and waiting to receive some special tools: ![]() Over the past few months, I've tried to educate myself on the issue, and I figured it was time for a thread that addressed everyone's questions. Naturally aspirated or forced induction applicationsīrisk Silver Racing spark plugs have helped Tim Lynch and Steve Petty to keep the A/F mixture lit and set 4 New World Records since they started using them in their extreme 3,000+Hp 6.66sec 223.5mph Twin Turbo 10.5 Outlaw Mustang, and can do the same for you.If you haven't seen any threads about changing the spark plugs in your 5.4L 3V 04-08, you haven't been here very long. Methanol, ethanol, CNG, LPG, Propane, E85 blend, Alcohol, LNG, Race Fuels, Nitro, Nitrous. High RPM race engines with short time for ignition coil saturation. Old vehicles with weaker ignition systems and/or excessive oil consumption. Reduces wear on coil, leads and other ignition parts. Silver centre electrode, best thermal (heat) & electrical conductor. Our Silver Racing range works well with most aftermarket and OEM ignition systems form simple coil and distributor through electronic ignition and powerful direct ignition systems found on modern port and direct injection performance engines.įires properly even if fouling occurs, common standard plugs failure. The stronger the spark the faster and better the flame front and flame speed giving smother higher RPM range in engines. Silver metal is the single best material for a spark plugs core electrode, as it can dissipate heat fast, resulting in overall lower spark plug temperature and a more powerful spark. Most popular applications are modified Ford Lightining and Harley trucks, Ford Mustang Cobra & GTO.īrisk Silver Racing Spark Plugs have a smaller diameter silver core and conventional open spark hook type earth electrode give an outstanding performance in igniting high octane fuel mixture associated with alternative fuels like CNG, LPG, Propane, E85 blend, Alcohol, LNG, Race Fuels and Nitro. Brisk GR08S Silver Racing Spark Plug replaces NGK heat range 10 and 11. Brisk GR08S Silver Racing Spark plug is designed for forced induction applications and nitrous applications.
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