spark plug failure
Thread Starter
Joined: Nov 2007
Posts: 2
spark plug failure
I would like to know if someone knows why my spark plugs only last 5000 km.After plus minus 5000 km they are full off light brown (stuff) dont know the right word.
I also would like to know how to search previous topics.
thanks
I also would like to know how to search previous topics.
thanks
Senior Member
Joined: Jun 2006
Posts: 709
RE: spark plug failure
At the top of the home page for this site, you should see several options such as search, member gallery, etc. Click there and try it.
As far as the spark plug issue goes, "full off light brown stuff"........I'm guessing you are referring to deposits on the electrode and the
tip of the plug area? You didn't say what car, model, year, miles, etc. so I'm guess myself now. First of all, if the plugs are only lasting
5000km then there is a problem somewhere that needs to be diagnosed, probably by a competent mechanic if not a dealer. The plugs
in my car lasted 100,000 miles with no problem, so you can see there is something going on there that isn't right. I could guess and tell
you all the things it MIGHT be, but in this case, I'm afraid to guess because it's kind of a long shot one way or another. If this were a typical
car I'd say these are deposits that are not getting "burned off" due to some sort of voltage problem to the plugs, or it could even be
something completely different. Best to diagnose it, then fix it properly. It's also the least expensive way to avoid replacing things that
aren't the problem.
As far as the spark plug issue goes, "full off light brown stuff"........I'm guessing you are referring to deposits on the electrode and the
tip of the plug area? You didn't say what car, model, year, miles, etc. so I'm guess myself now. First of all, if the plugs are only lasting
5000km then there is a problem somewhere that needs to be diagnosed, probably by a competent mechanic if not a dealer. The plugs
in my car lasted 100,000 miles with no problem, so you can see there is something going on there that isn't right. I could guess and tell
you all the things it MIGHT be, but in this case, I'm afraid to guess because it's kind of a long shot one way or another. If this were a typical
car I'd say these are deposits that are not getting "burned off" due to some sort of voltage problem to the plugs, or it could even be
something completely different. Best to diagnose it, then fix it properly. It's also the least expensive way to avoid replacing things that
aren't the problem.
Thread Starter
Joined: Nov 2007
Posts: 2
RE: spark plug failure
Thanx for the reply and you are right , their was a problem with the coils on the spark plugs.My car is a 2002 C200K and it have four coils direct on the four plugs.
From the heat the coil cracked (very thin crack , you have to look very carefully to see it) Problem was that when the service centre replaces the plugs they did not pick up that the coils was cracked and as soon as the plugs get a little used(5000 km ) the coil spark to the body at low revs (up to 2000 rpm)
From the heat the coil cracked (very thin crack , you have to look very carefully to see it) Problem was that when the service centre replaces the plugs they did not pick up that the coils was cracked and as soon as the plugs get a little used(5000 km ) the coil spark to the body at low revs (up to 2000 rpm)
Senior Member
Joined: Jun 2006
Posts: 709
RE: spark plug failure
Thinking about it now, don't you think it should have been apparent to any repair shop that there was a voltage problem
to the plugs and that they should have been suspicious (as I was) of the coils the very first time? Hmmmm. That doesn't
seem right since you must have told them the plugs only lasted a very short time. Anyway, glad you found it.
to the plugs and that they should have been suspicious (as I was) of the coils the very first time? Hmmmm. That doesn't
seem right since you must have told them the plugs only lasted a very short time. Anyway, glad you found it.
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lxshk
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