Torquing question

autoart · 12-25-2019, 11:49 PM

Hope this is in the correct post. I am doing my valve cover on my n54. I set my torque wrench at 7ftlbs and it did not move the OLD bolt. I slowly increased the wrench until I got to 13ftlbs then it moved. I decreased it to 12ftlbs and tried a few of the other OLD bolts and they did not move. Can I conclude that the factory torqued them down at 12ftlbs.
The diy's I have read recommend anywhere from 6.5-7.5ftlbs depending on the post.
I have had my car for 7 years and the valve cover I believe is original.
To me it seems like a good way to find the torque load? What do you think?

Tambohamilton · 12-26-2019, 01:55 AM

Nope. The old ones will have a fair amount of static friction, which you've just measured. Over torquing valve cover fasteners is highly likely to cause cracks. Stick to the factory spec; use newtis.info to find it

mweisdorfer · 12-26-2019, 11:26 AM

8.5nm or 7 1/2#

http://bd8ba3c866c8cbc330ab-7b26c6f3...eplacement.pdf

12-25-2019, 11:49 PM	#1
autoart Colonel 465 Rep 2,388 Posts Drives: 2009 335i e90 M/ 22 X3/2016 Ho Join Date: Oct 2010 Location: socal iTrader: (8)	Torquing question Hope this is in the correct post. I am doing my valve cover on my n54. I set my torque wrench at 7ftlbs and it did not move the OLD bolt. I slowly increased the wrench until I got to 13ftlbs then it moved. I decreased it to 12ftlbs and tried a few of the other OLD bolts and they did not move. Can I conclude that the factory torqued them down at 12ftlbs. The diy's I have read recommend anywhere from 6.5-7.5ftlbs depending on the post. I have had my car for 7 years and the valve cover I believe is original. To me it seems like a good way to find the torque load? What do you think?
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12-26-2019, 01:55 AM	#2
Tambohamilton Brigadier General 3613 Rep 4,522 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Nope. The old ones will have a fair amount of static friction, which you've just measured. Over torquing valve cover fasteners is highly likely to cause cracks. Stick to the factory spec; use newtis.info to find it
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12-26-2019, 11:26 AM	#3
mweisdorfer Major General 1996 Rep 6,965 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	8.5nm or 7 1/2# http://bd8ba3c866c8cbc330ab-7b26c6f3...eplacement.pdf
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