Fortunately, you can save yourself some money by changing the spark plugs yourself, but parts of the job can be a real headache without a good plan. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes. Your spark plugs should be changed at the interval given in your owner's manual, and this can vary widely based on the type of plug your vehicle uses. Spark plugs play a critical role in your car's engine. How Often To Replace Spark Plugs. Show Less. In older or high performance vehicles, you may be changing your plugs every 20,000 - 30,000 miles. How long does it take to change the spark plugs and spark plug wires on a 8 cylinder engine? The savings aren’t likely to be worth it. About a half hour if you're mechanically inclined; an hour and change if you're not. He charged us $105/hr labor plus $20 per spark plug for a total of $540. ... Bosch Iridium and Denso Iridium TT bring the features of OEM Iridium long life plugs to the market, with an iridium or iridium enhanced fine wire center electrode and platinum or iridium/platinum tipped ground electrode. Spark plugs fire during your entire drive, not only when you start the engine. While you can buy aftermarket parts or bring your own spark plugs you bought to the mechanic for them to sue to cut some costs. - Answered by a verified Auto Mechanic Spark plugs wear out pretty fast and it may not be a good idea to try to get used or cheap ones to save a few dollars. Today, we bring you a look at the perfect Do-It-Yourself write-up on how to change the spark plugs in … In fact, if “long-life” spark plugs are installed, plug manufacturers advertise a recommended plug interval change between 80,000 to 100,000 miles. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes. If I coud do the other 3 in 45 minutes I was doing good. Answer. It should take the mechanic a little over an hour or so to make the replacement for you. I had a V6 engine that it would take 10/15 minutes to change the first 3, then down hill from there. First you need to understand what do spark plugs do? Back when the phrase was coined, you had to get under the hood with screwdrivers and do things like adjust ignition points, replace condensers, set engine timing and change your spark plugs.Wait, we can still change the spark plugs!Most cars still have a spark plug or 8 in there someplace. Wiki User July 30, 2013 12:50AM. Hello Everyone, How long should I let my engine cool down before changing the spark plugs? Long-life plugs are manufactured with Platinum or Iridium. He charged us $105/hr labor plus $20 per spark plug for a total of $540. Under normal operating conditions, expect a good 100k miles out of these plugs. How Much Does It Cost To Replace Spark Plugs? Learn when to change spark plugs by watching for these bad spark plug symptoms, plus why it’s important to keep this part of your car in great working order. The 97-03 5.4L and some 4.6L suffered from a blow out issue from under-torquing the spark plugs. Some are a piece of cake, some can take a long time. Spark Plug Basics: Your Questions Answered. How can a plug last that long? Sign #4: Your check engine light is on Advice, how-to guides, and car care information featured on AutoZone.com and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. How does it take to change the spark plugs and spark plug wires on a 8 cylinder engine? Therefore most forums have come to the general consensus to go against the owner's manual and change the recommend spark plug torque to 28-32 ft/lbs. Do you know how long spark plugs typically last? Of course, they don't last forever, so it's important to replace your spark plugs from time to time. 6 Answers. It's all about spark plug access and spark plug tool (sockets or wrenches) working room, to remove and install the spark plugs. Depends on the car and sometimes the plug. Our mechanic claimed it took him 4 hours to change 6 spark plugs in our 06 sienna. How long does it take to change the spark plugs on a Nissan Maxima? If I coud do the other 3 in 45 minutes I was doing good. Some cars are harder to do than that. Spark plugs in the Ford F-150 can be very difficult to remove.. Ford has issued a service bulletin (08-7-6) to address this issue, which includes a recommended procedure on how to remove the plugs. When your spark plugs are on their last leg, it can take a toll on your car’s performance. How many labor hours are necessary to change the spark plugs? These spark plugs are designed to work for up to 100,000 miles before replacement is needed. Spark plugs play a critical role in your car's engine.