[Tweedboru]

Hi, I replaced my IMS bearing as a precaution, it was still in excellent condition after 167,000 KM, both seals were intact and in place, longlife grease long gone having been replaced with plenty of engine oil (splash from crankcase)
The bearing was NSK double row ball race W5204 20x47x23.8 wide, this bearing is very hard to find (Porsche sell it with the shaft, mega bucks ) so I used similar spec NSK Double row ballrace 5204 20x47x20.6 with a 3mm washer spacer, both seals removed.
The tool to remove it is easily made using steel exaust tubing 50mm dia x100 long
split it with trusty angle grinder, open it out a few mm (spread ) to an easy sliding fit through the crankcase hole and internal dia greater than the bearing 47 O/D the rest of the puller is a sleeve joiner ,internal thread to suit bearing bolt, the joiner can be welded to a 12mm or larger threaded draw bolt about 100mm long , a 6mm + thick end plate and 12mm hex nut for the draw bolt, total cost about $10 from hardware store