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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > 335d Engine Cover Bolts



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      07-15-2012, 08:54 PM   #1
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335d Engine Cover Bolts

I feel stupid. I took off the engine cover today for the first time. Bolts unscrewed easy with the a 5mm hex wrench. After some finagling, I got the cover off with no issues.

However, after I got it back on and aligned it, I could only get 3 of the bolts to to catch the the threads. The bolt on the driver side front WILL NOT catch the thread and I even noticed some aluminum dust underneath with only light pressure applied for screwing it down. WTF? I spent over 30 minutes trying to screw it back in. I noticed the metal sleeves inside the grommets need to sit flush, but even after adjusting them, I still couldn't get it screwed in. I like to see what's going on under the cover once in a while, but I am discouraged to take this thing off again. Ridiculous, really.
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      07-15-2012, 09:08 PM   #2
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This happened to a friend of mine. He stripped the threads. Brought it in to a dealer an apparently they're not easily replaced.

But you can get a tool to re-thread the holes. That worked perfect for him!
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      07-15-2012, 10:47 PM   #3
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Update: my OCD got the better of me- turns out the threads were not stripped- I just had to finesse the screws in by being light on the pressure and manipulating the cover til they caught. Still took way too long for such a simple procedure.
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      07-16-2012, 05:55 AM   #4
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Quote:
Originally Posted by scott135i
This happened to a friend of mine. He stripped the threads. Brought it in to a dealer an apparently they're not easily replaced.

But you can get a tool to re-thread the holes. That worked perfect for him!
Go to a local tool store and get a set of "tap" to fix it ( they will show you how to use it, it's very easy)
Make sure the part of the cover that goes far back goes in its track.
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      07-16-2012, 10:30 AM   #5
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Well, I was lazy and decided to not bother screwing in the screw near the cowl. Turns out it's there for a reason, and I get this vibration on take off and a different sound going over speed bumps (the rear part of the cover is loose).

That's what I get for being lazy.
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      07-16-2012, 09:45 PM   #6
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Quote:
Originally Posted by OILPowered View Post
Well, I was lazy and decided to not bother screwing in the screw near the cowl. Turns out it's there for a reason, and I get this vibration on take off and a different sound going over speed bumps (the rear part of the cover is loose).

That's what I get for being lazy.
This happened to me too. Got some tap screws as mentioned above and that worked for me. Got tired of the rattling noise coming from the engine bay.
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      07-18-2012, 11:16 AM   #7
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you're better off going to your tool store and buying a T30 torx screwdriver (with something longer handle wise) cuz more leverage Nd Easier to manipulate the screws .. ESP the 2 in the back.
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      07-18-2012, 01:31 PM   #8
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Thanks for all the replies guys, but the threads were not stripped. I just had to spend some time getting the screws aligned. Took a surprising amount of effort for what should have been a simple task though. I will limit cover removal to a few times a year as a result.

I will take your advise JonDiesel as a better tool for the job may make it a lot easier.
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