Question about changing spark plugs.
#1
Le Mans Master
Thread Starter
Question about changing spark plugs.
Are the change intervals based on time or mileage?
Car is a 2010 (owned it since new) but only has 21k miles.
Stealership is telling me that they should be replaced...?
Car is a 2010 (owned it since new) but only has 21k miles.
Stealership is telling me that they should be replaced...?
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important (11-18-2017)
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important (11-18-2017)
#4
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The plugs are recommended to be changed at 100K miles. There are always exceptions to that guideline, but I wouldn’t think at 21K miles they would need to be changed. Pull a plug or two and see what they look like.
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important (11-18-2017)
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#7
Le Mans Master
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The entire process seems pretty easy.
But unsure about the amount of "torque" needed to tighten.
From the videos Ive been watching, people will hand tighten until snug and then apply an additional quarter turn with the wrench.
Sound about right?
#8
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11 foot pounds is the spec.
approximate feel value would be hand tight.............
cylinder heads are aluminum and you do NOT want to over-torque them and possibly make removal impossible due to damaged threads
approximate feel value would be hand tight.............
cylinder heads are aluminum and you do NOT want to over-torque them and possibly make removal impossible due to damaged threads
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important (11-18-2017)
#9
Le Mans Master
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Should I disconnect the battery before attempting to remove the plugs?
Last edited by important; 11-18-2017 at 09:43 AM.
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important (11-18-2017)
#11
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no need
#13
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With 21,000 miles on your plugs ... your wasting your money by changing them
#14
Plugs
Yes it is always a good idea to disconnect the battery in most cases. Your 1/4 turn would be more for the rocker arms. Just make them hand tight and then snug them down a bit if you don’t have a torc rench. Not that big of a deal. I would do as others have said, pull one or two and if they look good then no need to change. Now if you are adding headers and pulling them anyway then I would change them out.
#15
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#16
Le Mans Master
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But I would imagine that its still overkill to change them at 21kmi even though these engines are POS.
Will pull one as suggested, just worried about re-seating it properly.
Last edited by important; 11-18-2017 at 10:43 AM.
#17
Le Mans Master
Dave
#18
The mileage is definitely not an issue. But let us not forget that sometimes old father time doesn't do us any favors when it comes to getting those little B!@#$%#S out. Probably unlikely that one would have a problem getting them out at 6 years or so, and probably not a problem for longer than that. Even anti-seize could lose its properties after years. But after they've been in there 8 - 10 years I would think why not replace them, for no other reason then to be sure they ain't stuck....LOL.....
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SweetBlueZ51 (11-19-2017)
#19
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The mileage is definitely not an issue. But let us not forget that sometimes old father time doesn't do us any favors when it comes to getting those little B!@#$%#S out. Probably unlikely that one would have a problem getting them out at 6 years or so, and probably not a problem for longer than that. Even anti-seize could lose its properties after years. But after they've been in there 8 - 10 years I would think why not replace them, for no other reason then to be sure they ain't stuck....LOL.....
#20
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Go on a Mercedes forum and ask.
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mikeCsix (11-19-2017)