Quote:
Originally Posted by steamship
Obvious question (for MJ) as I've never dealt with sump bolts before, but are those values so low because of the thinness of the metal used for the sump, to avoid distortion?
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That's normal for an M6 fastener, in aluminium or steel. I would have said 10Nm without looking it up, and yes two stages is to avoid distortion. Usually that'd be done in a diagonal pattern to pull it down evenly. I don't measure the first stage since spec on a D2 is just final torque, so I nip them up by hand first then follow with the torque wrench.
The 5+90° is the same as the cam caps in the D2. They're trying to achieve a specific amount of tension on the bolt with the 90°, as an angle is more accurate than a turning torque. Usually an angle signifies the bolt is torque-to-yield (stretching past its elastic limit) but that spec isn't enough to stretch a high tensile M6 bolt (I've measured used against new) so its just done for accurate tension.