Repairing sump plate

[Rolf]

Went over a not very large rock on Monday (very slowly) and heard a crunch as the sump plate landed on it, checked it last nigth and saw it is a bit bent on the front lip so took it off to hammer it straight and found that both the rear studs holding it on are snapped off. Suppose I will have to drill them out somehow and put new bolts in but wondered if anyone had another bright idea as an option. It doesn't move around much, but does explain the noisy vibration I started getting at 4000 rpm!

 

[Colban]

The usual problem with the rubber mounted stand-offs is that the bonding from the rubber bit to either of the threaded bits comes unstuck.Easy to fix with new bonding or new stand-offs.
Are you saying that the threaded section has broken off in the alloy sump and that there isn't enough metal to turn with mole grips,or similar?.

 

[hops]

I had a similar

thing after some tw@t nearly sideswiped me on a roundabout. You will almost certainly be left with a section of the mounting bolts intact, probably with a metal disc which you can use to unscrew from the threads on the underside of the engine using pliers or molegrips. The bolts are effectively a circular piece of rubber sandwiched between two discs of metal and a thread on either side. One thread goes into the underside of the engine (this is the piece you are likely to be left with, it is designed to do that in the event of a solid impact) the other thread is used to secure the bash plate.

Hope this makes sense, if not I will try to add a couple of pics.

motorworks do them, part number FRA40864

http://www.bmwandguzzispares.co.uk/bmw/products/product.php?f=b&bke=bmw&q=bobbin&x=0&y=0&spPage=2

 

[Dragon Master]

thing after some tw@t nearly sideswiped me on a roundabout. You will almost certainly be left with a section of the mounting bolts intact, probably with a metal disc which you can use to unscrew from the threads on the underside of the engine using pliers or molegrips. The bolts are effectively a circular piece of rubber sandwiched between two discs of metal and a thread on either side. One thread goes into the underside of the engine (this is the piece you are likely to be left with, it is designed to do that in the event of a solid impact) the other thread is used to secure the bash plate.

Hope this makes sense, if not I will try to add a couple of pics.

motorworks do them, part number FRA40864

http://www.bmwandguzzispares.co.uk/bmw/products/product.php?f=b&bke=bmw&q=bobbin&x=0&y=0&spPage=2

Aha... a light has just come on! Cheers Hops, you've just made sense of a problem I've had for a while, like bash plate mounting bolts falling off my 1100. I think I've just clicked to what Steptoe and a couple of others were trying to get through to me some months back. Maybe I really should give up the night shifts...

Dave.

 

[Rolf]

Thanks for responses - closer inspection revealed metal discs had come away - rebonded them with some Plastic Padding metal paste and seems to have done the trick (fingers crossed!)