Join Date: Jul 2007
Location: Anaheim, CA, USA
The torque on the cover bolts is 3 Nm (26 inch-pounds = 2.2 foot-pounds), plus after that, rotate the bolt an additional 90 degrees.
My torque wrench won't go that low, so I bought a Neiko 10573B Torque Screwdriver years ago. I don't use it often, but when I need it, I am glad I have it. There may be other, less expensive low-torque wrenches or screwdrivers today, but the Neiko worked for me at the time.
I like the idea of reusing the bolts, then seeing if there is a leak. Despite liking the idea, I will probably still use new stretch bolts in an abundance of caution.
I wonder where BMW gets them, and whether there is a less expensive place to obtain them?
There are two different sizes of stretch bolt that are needed, by the way.