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      10-25-2011, 12:13 PM   #1
Dackelone
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Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

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Arrow 135i Spark Plug replacement DIY...

Spark Plug replacemnt on my 135i N54...


Spark plug socket - Hazet #4766-2
(14mm 12pt 3/8 drive) 25 euros

3/8 drive extension 30cm long
Torque wrench (low strength) 23 NM(!)
Hex wrench 5 mm
Magnetic telescopic pickup
8mm ¼ drive (cowl cover)

6 spark plugs BMW 12 12 0 037 244
BOSCH ZGR6STE2


The spark plugs should be changed every 45K miles. IF your car is still under warranty BMW NA will change them for you. I live in Germany though, and here we must pay for ALL services. Nothing is free in Germany, except the autobahns(at least for now)!! lol

I decided to buy my spark plugs from BMW, mainly because I have read that some members have had misfire issues with equivalent BOSCH plugs. The spark plugs say BMW/BOSCH on them. BMW list price is 17 euros each, I paid 13 euros from my friends at my BMW Zentrum.

The spark plugs need to be torque to 23Nm. I bought a low spec 3/8’s torque wrench from Gedore: 5 – 50Nm specs. Install them dry without any anti seize. Also install them with a cold engine.

Here are my DIY photos…


Btw... I found this DIY over on the e90 post very helpfull...

335i - change spark plugs after 16000 miles

http://www.e90post.com/forums/showthread.php?t=142679




Open hood,
Remove: pollen micro filter (6 x 8mm bolts)
Remove 2 x 8mm bolts (one in each corner of the black metal tray that the pollen filter sits in.
Remove sensor(s) on each corner of tray.
Now pull out the tray - front part raises - rear unclips out of slot

Remove 4 x 5mm allen (chease head/impulse) bolts on engine valave cover.
The left rear bolt is tricky to get access too. Use a long 1/4 inch ratchet extension. Also use a telescopic magnetic to "catch" the bolt from falling into the engine inner bowls.

Now you can unclip the coil pack (do one at a time!) Gentley pry up on the top of the coil pack to release the electrical connection.

Then I used a short 1/2" extension to pull straight up gently and SLOWLY. You don't want to break a coil pack!

Then use your special 14mm 12point spark plug socket to unscrew the plugs. ONE at a time. Then install a new plug (dry no - anti seize), hand tighten then use your torque wrench set to 23Nm.

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use your megnetic pick up tool to catch the 5mm allen bolt incase it comes off of your 1/4 ratchet drive.
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use a short 1/2 drive ratchet extension to pull the coil pack(s) STRAIGH UP with force. SLOWLY and gently pull them straight up!
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Last edited by Dackelone; 10-26-2011 at 07:24 AM..
Appreciate 3
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