Sealing the N55 Bed Plate - Attempt 1 - Utter Failure
The N55 engine uses an anaerobic sealant injected into a channel between the crankcase halves. There is very little documentation about this topic. I found one thread here showing the tools used to inject the sealant:
Is RTV ok for engine block and bed plate? - BMW M5 Forum and M6 Forums
So, I ordered the following part numbers:
83197536051 - Block Sealant (QTY 1)
83197515683 - Block Primer (QTY 1)
11117506546 - Injection Valve (QTY 2)
The factory service manual (and the link above) shows a threaded rod injection tool. The threaded rod is supposed to press the piston inside the adhesive cartridge. So, I made a similar tool on the milling machine. I used the orange tip for all injections - I did NOT use the blue needle tip at all.
The problem was, during insertion the pressure generated by the liquid was more than the piston's seal could withstand. So instead of pumping into the block, adhesive just blew past the piston and onto the threaded rod.