How do I know if my BMW coil pack is bad? What spark plugs does BMW recommend?īosch and NGK are original suppliers to BMW for spark plugs and the ignition system is set up to use these plugs. While you’re replacing your ignition coils, we recommend inspecting and replacing your spark plugs at the same time. Should I replace ignition coils with spark plugs BMW? Also, the double-electrode technology and durable materials are other advantages. The real difference lies in thermal transfer between electrodes and engine cylinders. There is no doubt that NGK spark plugs are great, yet Bosch ones also work decently at ignitability and combustion. What spark plugs are better NGK or Bosch? Even with small variations in the factory set gap the ultra-efficient firing power design will compensate for those small variations. Iridium Power Gapping Tips In most cases your Iridium Power plugs do not need to be gapped. Do you need to gap NGK Iridium spark plugs? Over tightening can also compromise a plug’s internal gas seal or even cause a hairline fracture in the insulator. What happens if you over torque a spark plug?Īn over-torqued spark plug can cause stress to the metal shell, leading to thread damage or breakage. The more horsepower and boost you are running will require shorter intervals for changing spark plugs. Tuned N54’s should have their plugs changed every ~20,000 miles as the additional power will put a higher demand on the spark plugs. How often should you change spark plugs N54?įor the N54 engine the spark plugs should be changed every ~40,000 miles. NGK 97506 (SILZKBR8D8S) Laser Iridium Plugs can be used in any modern BMW Turbo Engine. Too large a gap can cause misfire issues while too small a gap can reduce air-fuel burn efficiency. It’s important to have a good spark plug gap for many reasons. Gapping spark plugs is another common topic for good reason. Too tight spark plugs can damage the cylinder head, and make them impossible to remove. However, it is possible to tighten the plugs satisfactorily without a torque wrench. Spark plugs should be torqued to manufacturers’ specifications. How do you change the spark plugs on a 2008 BMW 328i?ĭo I really need a torque wrench for spark plugs? Ignition misfires are probably the most common symptom experienced by BMW drivers that lead them to check the status of their spark plugs. How do I know if my BMW spark plugs are bad? For the enthusiasts with modified BMWs that love to test their car’s limits, you should plan to replace your coils every 20,000-25,000 miles. If you frequently push your car’s performance, the lifespan of your coils can decrease significantly. Most BMW ignition coils last for more than 140,000 miles. How long will it take to replace BMW N55 spark plugs? On a lot of cars and engines, it only takes a few minutes to replace your spark since so much has to come off the engine to get to the plugs on an N55, you can expect it to take you around 2 hours to complete this job. How long does it take to change spark plugs in a BMW? These plugs must be gapped to precisely 0.022″ (0.56mm) using a spark plug gap tool! It’s also a stronger iridium-tipped plug instead of the stock Nickel-Copper for more consistent performance under high boost. This NGK N54 plug is one step colder on the heat range scale. Tighten the spark plug finger-tight until the gasket reaches the cylinder head, then tighten about ½ – ⅔ turn more with a spark plug wrench. How much do you torque down a spark plug? Reinstall ignition coils and reconnect electrical connectors. How much torque does a BMW 328i 2008 spark plug need? I ended up setting my torque wrench to about 25 Nm and tightening them down (several turns past a quarter turn). This DIY lists torque for the plugs at being between 23 and 28 Nm, but the plug box says to torque just a quarter turn past tight. 24 Do new spark plugs make a difference? What is the torque setting for BMW spark plugs?Ģ3 Nm is spec, but 28 Nm was used in previous posts as well.
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