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06-27-2012, 03:18 PM | #1 |
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When Do You Change Spark Plugs?
Assuming stock motor, no FI... at how many miles do you guys typically throw in new spark plugs? Does it matter on driving style too (daily commuter, normal track usage, etc.)?
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06-27-2012, 03:47 PM | #2 |
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I changed mine just before I got to 60,000 miles, not necessarily becuase they needed it, but because I don't like having to remove plugs that have been in for 100,000 miles.
While there's some risk everytime you do any maintenance on the car, plugs are relatively cheap, and the jobs easy to do (given the correct tool), so why not. Access to the plugs is also way more open in the Z4 than about anything else modern I've had the opportunity to work on. Certainly easier than on my wife's E90 328xi.
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06-27-2012, 04:03 PM | #3 | |
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06-27-2012, 04:20 PM | #4 |
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I would say 60k miles depending on driving style. On the track with the higher engine temps, rpm, and fuel pumped through the engine, you probably want to change them sooner. I waited until over 90k to change mine, and that was too long.
Make sure you use a torque wrench and anti-seize.
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06-27-2012, 04:41 PM | #5 |
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I usually change them yearly or around 20k, when i do a valve adjustment/check, I don't like to re-use the plugs as they have the crush washer (one time use?) and plugs are very cheap. I went with the NGK iridium as opposed to the OEM, gapped them, no grease or anti-seize after cleaning the wells.
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06-27-2012, 05:33 PM | #6 |
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My Z4 is sitting at 83,000km I did my plugs at 80,000 but I'm not sure if it's the first or second change as I bought the car at 70,000ish.
I'll generally inspect the plugs, filters, belts etc every 2 months myself and replace when needed. |
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06-27-2012, 07:35 PM | #7 |
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I changed at 50,000 because that is when I did the valves and the vanos filter. Figured to do everything at once and avoid the work of pulling it apart twice. Call me lazy.
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06-27-2012, 07:52 PM | #8 |
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i just replaced mine, my car is a 05 with 100k
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06-28-2012, 12:04 PM | #9 |
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I have a 2007 3.0i and I just replaced mine at 32,000 miles. I drive mine pretty hard and was having a miss fire problem. I was about to change oil and filters anyway and figure plugs are pretty cheap.
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06-28-2012, 06:54 PM | #10 |
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Replaced mine around 60K miles....the old ones did not look too bad at that point but it does start better and run smoother now. Or is that Figment talking.
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06-28-2012, 07:47 PM | #11 | |
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Quote:
http://www.zpost.com/forums/showpost...1&postcount=47
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06-29-2012, 03:32 PM | #12 | |
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06-29-2012, 03:39 PM | #13 |
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They are fine, they gap easy (they are NOT pre-gapped), I found variances when I took them out of the box. NGK makes great plugs and they are fine to use in the S54.
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