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Old 12-17-2016, 01:56 PM
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wpoll wpoll is offline
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,527
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Originally Posted by X53Jay4.8is View Post
+1 on wanting to know. I mean really the plate appears to more of protection from the underside of the engine if you were to go off road. It doesn't appear to be structural since is attached to the subframe.
The plate IS structural in that it stops the sub-frame from twisting under torsional load. It works in a similar way to a diagonal brace on wall framing in a house. It doesn't need to be super thick or strong to stop diagonal distortion of the sub-frame but the mounting bolts DO need to hold it place very tightly to allow it to do its job.

This is why some folk get creaking from the plate when the bolts aren't tight - the plate is pulling sideways on opposite corners and the bolt-to-plate joint creaks and groans.
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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