(C36 engine-out project) The rear engine mount studs were frozen by corrosion into the mounting holes in the bell housing. This rendered them non-adjustable. True, I could have left well-enough alone, but chose note to. I cut the studs on both sides, and drilled out what remained. I'm in the market fro new mounts. Tom Soko recommended the Vetus K50's, as do amny others on the c34.org site. Vetus also makes a super-duper elastic/hydraulic mount, the MITSTEUN. K50's are about $34.00 each, MITSTEUN's $73.00 each. Any experiences? Comments? thanks, jv