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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > ignition coil replacement



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      04-24-2014, 10:29 PM   #1
r0bert
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ignition coil replacement

So I went through some trouble changing my spark plugs and ignition coils. I had posted already I had problems with misfires in two cylinders after changing valve cover gasket and spark plugs. (Most memebers suggested it was something simple and it was.) I bought a second set of new spark plugs, swapped ignition coils, and finally ordered all new ignition coils but still had problems.

Bottom line is that a couple of members had suggested to make sure that the piece on top of the ignition coil that holds the wire harness is snapped in all the way but I found it takes a little more than that.

Even though you hear it snap, that is not good enough. What I had to do was give the wire harness a little extra push in with my finger and it went in about another 3/16 give or take. Before the extra push a could see a little gap between the end of the wire harness and the end of circle on top of ignition coil. After extra push end of wire harness goes a hair past the end of the hole.

Such a simple thing caused misfires left and right. All is good though. I now have new valve cover gasket, spark plus, and six new ignition coils. Glad to have my car back.


Shot out to the following members who made me think of pushing the wire harness a little harder in:


NormE91, NGEE

Also I found the best deals for parts at:

Original BMW Gaskets: (second guessed myself after purchasing this since original gasket went out after ~80,000 miles)

TomkinsonBMWParts.com

valve cover, valvetronic motor, and valvetronic sensor gaskets

~$70


Coils:

amazon.com; six new BMW Ignition Coil Bosch OEM 04464 / 12219 / 04470 / 94937 (6pcs) for $162.50 from BarMac Automotive
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      04-25-2014, 02:28 AM   #2
e92_enthusiast_1
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Sweet. Grats on getting everything resolved. Shout out to the e90 crew. Everyone's always super helpful around here.
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      04-25-2014, 02:54 AM   #3
NGEE
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Awesome - glad it's all sorted. They're finicky little buggers
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1M. Previously: '13 135is; '07 E90 335i; '02 325i; '99 Z3; '98 328is; '87 L6; '77 320i
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      04-25-2014, 04:39 AM   #4
NormE91
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Glad that worked out for you! I know it was super frustrating when I had that problem. Every other connector on the car, that I know of, is connected when the clip is closed! Very un-German if you ask me.
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      04-25-2014, 10:50 AM   #5
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How long did it take to change the valve cover gasket?

How long did it take to change the valve cover gasket?
What was most difficult?
And how much experience did you have prior to this with
similar jobs?
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      04-25-2014, 11:24 AM   #6
07whitebmw328i
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I experience the same thing when I changed my spark plugs. I've used a small flat screw driver to pry/push the connectors in place.
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      04-25-2014, 12:15 PM   #7
StereoSteve
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Quote:
Originally Posted by ctuna View Post
How long did it take to change the valve cover gasket?
What was most difficult?
And how much experience did you have prior to this with
similar jobs?
following the guides and videos found online, you could probably do all this on a saturday afternoon. the hardest part, in my opinion, is getting the gasket to sit as you struggle to fit the valve cover back into place. just go for it, you'll learn a little more about the car and save a lot of money.
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      04-25-2014, 12:42 PM   #8
r0bert
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My prior experience as far as valve cover gasket changing: I changed my Toyota highlander one which was a breeze with so much room.

It took me a good full day and a couple of hours the next day but that included going to Lowes to get a compressor and impact gun and a bike ride to local auto place to get a 10 mm deep socket.

I could easily change it now in an afternoon like sterosteve said.

Most difficult parts:

1. disconnecting valve breather hose in back of cover. just couldn't get a good grip on hose clips. ended up turning clip horizontally and pushing long skinny flat screw driver between one side of release clip and valve cover. then I only had to push one side in and pull at same time

2. like others said, pulling off valve cover is one thing since it is so tight but putting it back on and keeping gasket in place is a lot harder task


If you follow pelicanparts guide when it comes to fuel injector I decided NOT to go with pry method and simply unclip each clip with a small screwdriver and it comes right off. Also some of the socket sizes he mentions were not correct either.

Another tip to getting ignition coils off is I had a ~3/4 inch rope that I put through clip on top and that helped getting those out very easily. Pulling and twisting with rope was a lot easier.

Do you have all the right tools E/T sockets, impact and the 90 degree ring pliers?
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