987 IMS Bearing Issues Continued
So we decided to drop the motor and see if we could save the engine with a new IMS bearing. Since the car is a tiptronic with the glass window, it is just easier to drop the entire assembly rather than pull the tiptronic out…..and since we were throwing that crank position code, it just makes things easier in case we have to pull things apart.
With the engine out, we can see that the center support stud of the IMS bearing is broken and missing. The result is a big open hole into the middle of the IMS shaft. No wonder there was oil coming out so fast. Neither the RMS or the IMS seals were actually leaking.
After getting the flange out, I pulled about 4 remaining ball bearings, the center race for the bearing, and the broken support shaft from the other end of the hollow intermediate shaft with a magnet. All other parts had chewed themselves up and melted around the bearing race.
The outer race is still pressed into the intermediate shaft. Now the interesting thing, is that the snap ring to remove the bearing is there….but it is surrounded by melted metal, thus ruining our chances of saving this engine.
Here you can see the snap ring clearly (and another blown bearing race behind it) from a spare motor we had laying around. If you can’t remove the snap ring, you can’t replace the bearing, and it laughed at everything we had to try and get to that snap ring exposed.