new member, huge problem... - BMW Forum

desertrat1969 · 03-31-2012, 04:13 PM

Not sure what to do....

Got my newly rebuilt 1991 325i, m20 head back from the machine shop today. When I bolted on the cam sprocket the bolt snapped off INSIDE the end of the camshaft, before the spec'd 48-52 lbs torque was reached!!

Has anyone even heard of something like this happening? Is it likely that the machine shop that did the rebuild could drill it out and use an EZ-out, or some other similar tool to remove the stud out of the camshaft, without damaging the camshaft or the head?

Lord Vader · 03-31-2012, 06:55 PM

I've never heard of it but I'm sure it's possible. Ask your machine shop. They should have the tools to fix it. I was removing a bolt that holds my bumper on and the nut siezed and sheared off the bolt so it does happen.

Jack Dabsy · 04-01-2012, 08:29 AM

Yes it happens... Drill and stud-extractor required.