[JFP in PA]

Pretty much correct, however, the question was “does the IMS leak when failing”, and the answer is sometimes “yes”. I would say less than 20% of the ones we pull are leaking at some level, some worse than others. All of the “leakers” were very loose and often noisy as well. At one point, Porsche was actually doing IMS bearing re sealing on cars still under warranty. But when a car starts showing signs of oil leakage in the bell housing area, there is no way to know if it is the IMS or the RMS until you pull it apart. Usually, only one of them is leaking, but sometimes both are. We have had cases of a dealer diagnosing the oil leak as the RMS, but whey we pulled the gear box we found a very bad IMS, while the RMS was bone dry. I know of one report of a car being serviced for what was suspected to be the usual RMS problem, but when disassembled they found the IMS is such bad condition that the center bolt easily came out trying to extract it to do the IMS upgrade. In another case, the owner heard a noise and shut the car off, only to find oil leaking out under the car. Towed to a shop, when they pulled the flywheel off, the IMS center bolt and nut fell onto the floor. Yes, they do leak…………..