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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Do you replace valve cover bolts?



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      08-09-2015, 03:51 AM   #1
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Do you replace valve cover bolts?

I called my dealership today to see if they had the 26 bolts needed to secure the valve cover and they said that I don't need new ones for my 2008 335i. They are supposedly made out of steel. Is this true? My car's build date is 12/07.

Thanks
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      08-09-2015, 04:26 AM   #2
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I believe you do need to. As long as they have blue residue/loctite on the threads then you have to replace them.
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      08-09-2015, 04:42 AM   #3
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Put a magnet on them and find out.
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      08-09-2015, 05:05 AM   #4
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no
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      08-09-2015, 08:27 AM   #5
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Google diy e90 n54 valve cover gasket. There are complete instructions with pics. I am getting ready to do this also. Good luck.
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      08-09-2015, 08:32 AM   #6
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No the bolts don't need replacing. Maybe if gasket has already been replaced or if bolts have surface rust I would but I never have. They arent aluminum on the n54. Make sure you start all of them by hand first then tighten/torque the four corners first. seems to be the trick to prevent them from cracking
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      08-09-2015, 02:37 PM   #7
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Quote:
Originally Posted by smitty513 View Post
No the bolts don't need replacing. Maybe if gasket has already been replaced or if bolts have surface rust I would but I never have. They arent aluminum on the n54. Make sure you start all of them by hand first then tighten/torque the four corners first. seems to be the trick to prevent them from cracking
+1 bolts on n54 are steel, bolts on the N52 are aluminum and need to be replaced. The bolts on the N52 are prone to breaking, where the N54 the valve cover is prone to cracking.
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      08-09-2015, 03:15 PM   #8
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Quote:
Originally Posted by jin View Post
Put a magnet on them and find out.
Good idea! Didn't think of that.

Quote:
Originally Posted by #Tee View Post
no
Thanks

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Originally Posted by milbotate View Post
Google diy e90 n54 valve cover gasket. There are complete instructions with pics. I am getting ready to do this also. Good luck.
Yes, I've seen the DIY and will be using it to do this on my car with a friend. The DIY should be updated to say the N54 does not need new bolts for the valve cover. Thanks!

Quote:
Originally Posted by smitty513 View Post
No the bolts don't need replacing. Maybe if gasket has already been replaced or if bolts have surface rust I would but I never have. They arent aluminum on the n54. Make sure you start all of them by hand first then tighten/torque the four corners first. seems to be the trick to prevent them from cracking
Thank you. So the dealer was right.

Quote:
Originally Posted by KeepRidingDirty View Post
+1 bolts on n54 are steel, bolts on the N52 are aluminum and need to be replaced. The bolts on the N52 are prone to breaking, where the N54 the valve cover is prone to cracking.
That's what he said too. He said the 330 and some other model used the aluminum bolts. Thanks!
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      08-09-2015, 03:29 PM   #9
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The bolts still break very easy. Make sure you torque them to spec. I snapped one off and left the car down for many days.
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      08-09-2015, 05:10 PM   #10
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Quote:
Originally Posted by milbotate View Post
Google diy e90 n54 valve cover gasket. There are complete instructions with pics. I am getting ready to do this also. Good luck.
Yep, I wrote it, you don't have to replace bolts but I would also not just replace the gasket. I suggest replacing entire cover and the cover comes with bolts and gasket.
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      08-09-2015, 05:11 PM   #11
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Make sure car is cold before doing this job.
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      08-09-2015, 05:17 PM   #12
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Quote:
Originally Posted by vbp6us View Post
Good idea! Didn't think of that.



Thanks



Yes, I've seen the DIY and will be using it to do this on my car with a friend. The DIY should be updated to say the N54 does not need new bolts for the valve cover. Thanks!



Thank you. So the dealer was right.



That's what he said too. He said the 330 and some other model used the aluminum bolts. Thanks!
My DIY has always stated "it is not necessary to replace bolts".
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      08-09-2015, 06:35 PM   #13
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Quote:
Originally Posted by robc1976 View Post
My DIY has always stated "it is not necessary to replace bolts".
Sorry I misspoke. In the comments some people seem to indicate that replacing the bolts is necessary. I will be replacing the valve cover which comes with bolts as you indicated.
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      08-09-2015, 08:17 PM   #14
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Quote:
Originally Posted by robc1976 View Post
Yep, I wrote it, you don't have to replace bolts but I would also not just replace the gasket. I suggest replacing entire cover and the cover comes with bolts and gasket.
Why change the cover? If its not cracked or leaking is there any benefit?
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      08-10-2015, 12:24 AM   #15
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Quote:
Originally Posted by jin View Post
Why change the cover? If its not cracked or leaking is there any benefit?
Something about a filter built into the cover which cant be cleaned
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      08-10-2015, 12:33 AM   #16
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Quote:
Originally Posted by glachhman2 View Post
Something about a filter built into the cover which cant be cleaned
Lot more than that, it is the pcv ports and channel's. This can lead to pressure in crankcase and cause turbo drain issues among other thing.

This is inside a valve cover I changed:
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      08-10-2015, 09:39 AM   #17
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Quote:
Originally Posted by robc1976 View Post
I suggest replacing entire cover and the cover comes with bolts and gasket.
This ^^^ Just do this.
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      08-10-2015, 09:42 AM   #18
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I replaced the bolts. It came with the kit. Did not want to have to this again for a while since I am keeping this car for a while. I also had to replace the OFH gasket as well.
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      08-10-2015, 02:25 PM   #19
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Anyone have the part number for this kit? My dealer insists that they're steel and cannot be stretched or snapped at 7 ft-lbs or anything close to it. And he quoted me $400+ for just the cover...
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      08-11-2015, 01:03 AM   #20
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BMW part # 11127565284; also available here > http://www.ecstuning.com/BMW-E92-335...overs/ES18622/
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      08-11-2015, 02:17 AM   #21
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BMW part # 11127565284; also available here > http://www.ecstuning.com/BMW-E92-335...overs/ES18622/
Thank you.
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      08-11-2015, 04:47 PM   #22
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Can't the valve cover just be cleaned opposed to spending $400 on a new one?

Edit: Disregard, just re-read glachhman's post about the uncleanable built in filter. Does having a OCC make replacing the valve cover unnecessary?
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