Halo^TM Plug Installation Notes

Halo is interested in helping you maintain your vehicle in optimum running condition. Generally, the engine must be in good working order before you can reap the benefits of installing the Halo^TM spark plug. Faulty EGR (exhaust gas recirculation) valves, dirty battery posts, old plug wires and the inability of your engine to sufficiently adapt to the faster burn will negate the advantages of these or any other spark plugs. Always check these specific items as a part of your regular tune-up, and follow the tips below.
BATTERY NOTES: Ensure that your battery connections are clean. Disconnecting the battery during installation will normally accelerate your engine's adaptation to the plugs. Clean your terminals and posts while the battery is disconnected. Coat the battery posts with a conductive, anti-seize compound and then do the same to the terminals once the battery is reconnected to slow the corrosion rate and maintain the quality of the electrical contact. 
SPARK PLUG WIRE NOTES: If you have a higher mileage vehicle (50,000 miles or more) it is quite likely that your spark plug wires have become brittle and should be changed. Even slightly twisting the wires (as would be necessary during plug installation) can cause a breakdown of the conductor and result in the engine rough, no matter what type of spark plug you use.
IGNITION TIMING NOTES: Most vehicles do a good job of adapting to the faster burning characteristic of the Halo^TM spark plug on their own. However, rough idle and/or knocking are good indications that the spark advance needs some attention, as does a reduction in idle speed upon installation. If you install the plugs yourself and experience immediate problems of this nature, you must have the vehicle checked by a certified mechanic. Normally and adaptive reset on the ECM or manual retarding of the spark advance will correct these types of problems. 
EGR VALVE NOTES: Faulty EGR valves can seriously affect engine operation and fuel mileage. Extreme cases of defective valves can cause engine component damage (including spark plugs). It is imperative that the EGR valve is in proper working order before installation of the Halo^TM spark plugs. Halo^TM spark plugs have a true, preset, factory gap. Do not attempt to change the gap as this may damage the plug and void the warranty. While our cross reference and application guides are accurate to the best of our knowledge, you should always compare the thread length and seating configuration of your present spark plugs with the new Halo^TM plugs. Noticeable differences in these two items could indicate a cross-referencing error. NEVER INSTALL PLUGS WITH DIFFERENT THREAD LENGTHS AND/OR SEATING (GASKET VERSUS CONICAL TAPERED) AS THIS COULD DAMAGE YOUR ENGINE. You must use a torque wrench to tighten the plug to ensure proper seating. Tightening torque is 15 to 17 ft-lbs.  Due to the long life the plug offers, Halo recommends using a conductive anti-seize compound on the plug threads and dielectric grease in the plug boots.