Another solution is to remove the rubber grommet insert from the spark plug socket BEFORE using it, and initially thread in the spark plugs using hose or some other long tube by hand. Of course, you should only remove and install spark plugs in a cool engine, because metal expands when hot and thread damage can happen. Those might be good tools to have on hand. The spark plug holes must always be clean prior to installation otherwise, you may be twisting against dirt or debris and the spark plug will be under-torqued, even though your torque wrench indicates the proper torque. In short, over torquing can cause severe engine damage. The most dangerous result is pre-ignition when the heat dissipation is reduced due to metal shell stretching by over torquing. Stretching of the spark plug metal shell can break the inner gas seals or cause a fracture in the spark plug insulator. Over torque can cause the metal shell of the plug to stretch. Proper torque specs for both aluminum and cast-iron cylinder heads are listed below. As a result, the firing end of the spark plug can overheat and pre-ignition can occur. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. We accept no liability for the topicality, correctness, completeness or quality of the information provided.Torque is one of the most critical aspects of spark plug installation. Reinstall the suction hose and air filter.īefore starting the engine for the first time with the new coils, Please ALWAYSĬalibrate eccentric shaft sensor and delete N-VRam, see here:ĮCU NVRAM, KAM, eccentric shaft calibration Reinstall the negative battery pole to the battery. Browse our huge selection of Mazda Rx8 Spark Plugs, or try a search for a more specific Mazda Rx8 Spark Plugs using the site search.
Then mount the AEM ignition coils for trailing rear and trailling front, as well as the 4 M6 hexagon nutsįinally, connect the earth cable (-) BAT to the negative pole of the battery and fix it with a cable tie. Mount the ignition coil holder with the 4 short spacer sleeves without coils with the 3 screws M6 wrench size 10 suppliedĪlways screw the earth plug (-) ENG either to the inner holder screw or to one of the ignition coil bolts from the holder and earth (-) BAT to the (-) battery pole.įirst mount the AEM ignition coils for leading rear and leading front and make sure that you have the correct adapter and ignition cable assignmentĪlways spray a little WD40 or Ballistol into the ignition plug, then they will click in nicely. The scheme must be done exactly the same way for the AEM coils, otherwise the ignition cables are too short! OEM wiring harness 3 colors per connector: Spark Plug Replacement Service On average, the cost for a Mazda RX-8 Spark Plug Replacement is 179 with 84 for parts and 95 for labor. Leading Front = L1, Trailing Front = T1, Leading Rear = L2, Trailing Rear = T2 Leading is always the lower spark plug, trailing is always the upper spark plug. Therefore mark the connectors with an edding when removing them. Please always make sure that the firing order is correct!
In order to get closer to the plug of the spark plugs, it makes sense to screw the left wheel down at the front. Then remove the air filter box and suction hose.ĭisassemble the old ignition coils, holder and ignition cable. Remove the negative pole from the battery.
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