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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 11-24-2005, 01:28 PM   #1
EL_INMORALISTA
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when to change de spark plugs?

hello everyone,

i own a 328 CI 00' with 35 miles and was wondering when is the correct time to change the spark plugs. i have read that when the car gets the 60,000 miles but i am a little confused, anyone could help?
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Old 11-24-2005, 07:52 PM   #2
paquettc
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My dealer changes them at the Inspection II (96000km). My '01 330i is at 92000km and I just performed the Insp II service myself. My plugs were definitely done and in the future I would replace them sooner. What a difference now though. I did all the stuff for Insp II plus I changed the belts and the fuel filter. Now the car is a lot smoother in the lower rpm band. Plus the engine is quieter. For the $360 CAN in parts it was well worth the tune up!
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Old 11-25-2005, 04:59 PM   #3
MrL0Lz
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INsp 2

How long did it take for you to do inspection 2 on your car? And DIY's? Im over do for mine....
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Old 11-29-2005, 10:02 PM   #4
Erick Sermon
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i am always perplexed by how complicated ppl think inspection i and ii are.

its a huge rip off to bring it to the dealer...they just gouge ppl who don't know $hit about cars.
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Old 11-29-2005, 10:03 PM   #5
Erick Sermon
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it shouldn't take you more than a few hours if you're a novice...and most of that time is the oilchange and spark plugs...you can seperate those tasks if time is of the essence.
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Old 11-30-2005, 09:58 AM   #6
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I'm curious where you guys got your parts for the inspection 2? did u buy from tuner motorsports or buy them seperately? 360CDN ain't bad. The dealer wants 800$!
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Old 11-30-2005, 05:24 PM   #7
jason 77
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My dealer quoted me $589.71 for the level II inspection. Do you guys think that is a good deal?
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Old 12-02-2005, 08:36 PM   #8
papidog
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hello everyone,

i own a 328 CI 00' with 35 miles and was wondering when is the correct time to change the spark plugs. i have read that when the car gets the 60,000 miles but i am a little confused, anyone could help?


Changed mine at 90K. I am doing mine every 50K from here on.

On the picture, L is original, R is new Bosch Plus 4
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Old 12-02-2005, 09:05 PM   #9
Tom Busby
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If you race plugs are good for 10k on the street. If you don't plugs are good for 50k.
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Old 12-02-2005, 10:01 PM   #10
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Holy crap, NO! That is definetely NOT a good deal.
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Old 12-03-2005, 08:03 PM   #11
paquettc
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It took about 4 hours but my buddy and I were drinking! I bought all my parts from autopartsonlinecanada.com. I got a quote from my dealer on just the parts and I was able to save $120 with the online retailer. I believe **************** is the US store. Where the dealer overcharges is on the dummy inspection items. Check your turn signals, check the window defroster, check the air conditionner blah blah blah.

As for actually doing the inspection, I just hunted the diys in these forums. Everything was real easy to do. The only problem I encountered was removing the coupling hoses from the fuel filter. Took a little effort but they finally came off.

Anyway, if you have the slightest mechanical inclination I would recommend doing the work yourself.
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Old 12-05-2005, 02:13 PM   #12
M3Bmwcoupe
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Quote:
Originally Posted by Tom Busby
If you race plugs are good for 10k on the street. If you don't plugs are good for 50k.
Are you serious??? The newer spark plugs are good for at least 100k miles. But when you get spark plugs get the NGK ones and not the Bosch. If you "race" or beat on your car, you will actually find that oil, sparkplugs, etc etc will last a lot longer.
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Old 12-05-2005, 02:46 PM   #13
Tom Busby
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Yes -- plugs have real world maintenance schedule of about 50,000 miles. You are referring to car manufacturers' warranty of 100,000 miles, which is true to the extent that (my words) the plugs will in fact serve the purpose for which they are intended -- the car will move forward and start, etc. However, the car manufacturers' standard is minimal, and does not provide the best performance and economy from your car, which is what I mean by the maintenance shcedule I suggested.

If you doubt this, keep a written record of any modern car's gas mileage from 50,000 miles to 100,000 miles without a plug change -- mpg will decline. In my experience (like on my wife's cars) mpg will decline measurably between 70,000 to 80,000 miles without a plug change. I use gas-mileage as a marker for performance because it isn't practical to test performance, and I believe it is reasonable to assume that high-end performance will decline more rapidly than measurable gas-mpg. Therefore, on my cars I replace the plugs at no less than 50,000 miles. My wife's cars get a 70,000 mile replacement schedule since she won't notice the difference.
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Old 12-05-2005, 05:04 PM   #14
EIAlfonso
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I'm not mechanically inclined at all and it took me about 1.5-2.0 hrs to change my plugs. I spent alot of that time cleaning those parts of the engine that I never get to see.

If I did it again and didn't rush it would be 1-1.25 hrs. Mechanics generally do it in about 40-45mins, of course they (shop) charge you about 2 hrs $180-$200

You can do much of the stuff yourself for Inspection II

Leave the break bleeeding and the other tuff/messy stuff to the shop.

You'll save around $300- $1,000 if you do it yourself, which then justifies getting a little something for the car.
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Old 12-05-2005, 05:07 PM   #15
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Quote:
Originally Posted by M3Bmwcoupe
Are you serious??? The newer spark plugs are good for at least 100k miles....get .
My plugs, at 80K, threw a check eng light. Ever since I changed them I haven't had any trouble.

Next time I'll change them at 40-60K.
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