Hi,
I own a 73 Bavaria. Recently I noticed a small hairline crack (3 inches or so) on the centre floor of my trunk.
My understanding is that this is a stress fracture caused an old rubber differential mount, and is a common design flaw in these cars. I'm not all that familiar with e9s, but I've seen neglected Bavarias/e3 where the entire trunk is split by a crack of over a foot long.
My understanding is that the repair is (1) the removal of the rear diff., (2)weld up the hiarline crack, and (3) weld in a reinforcement plate in the effected area for many years of future happy motoring.
Has anyone had experience with this/has comments to offer/can point me in the direction of information about this? If all goes well, she'll be going under the knife this month...
Thanks!
Chris