The IMS bearing is a sealed bearing unit connected to the intermediate shaft. Both M96 (1997-2005) and M97 (2006-2008) engines are unfortunately notorious for IMS bearing failure. When failure occurs, catastrophic engine damage quickly ensues. The owner’s only recourse at this point is a costly complete engine rebuild.
While the M96 engines do have two preventative measures available on the market (the LN Engineering Retrofit Kit and the IMS Solution), the M97 engine IMS bearings are non-serviceable without engine removal and disassembly. However, the seal on the IMS bearing in the M97 engines can be removed, allowing oil to gain access to the bearing to increase lubrication. The increased lubrication in the bearing reduces friction and heat, and therefore extends the longevity of the bearing. While this is not a permanent solution, it can help to prevent failure of the IMS bearing. In addition to removing the seal, we recommend also utilizing high quality engine oil, changing the oil every 3,000 miles, and installing a high quality spin-on oil filter.
This project involves the removal of the IMS bearing seal on this 2006 997 Carrera S with only 13,000 miles:
After careful inspection for metal flake and debris in the oil (that could lead to the IMS bearing already beginning to come apart), the process can begin.
To begin the procedure, the transmission must be removed, the engine must be at TDC (Top Dead Center cylinder 1) and camshafts must be locked in place. Then, the tensioners can be removed.
Removal of pressure plate.
Removal of dual mass flywheel.
A look at the rear main seal and IMS bearing flange.
IMS bearing flange
The IMS bearing flange must be cleaned before removal to prevent dirt and debris from entering the engine.
The IMS bearing flange removed
The IMS bearing with the seal removed.
The IMS bearing flange reinstalled with its new 3-ribbed seal.
Rear main seal removed.
Rear main seal installed using factory Porsche tool.
Ready to go back together.
New dual mass flywheel installed.
New pressure plate and clutch disc installed.
Transmission going back in.
All back together.
This car came in with its original water pump. We recommend replacing the water pump every 3-4 years due to plastic impeller blades prone to breaking. Water pumps can experience blade and bearing failures.
Thermostat removed
New thermostat installed
Original water pump
Water pump removed
New water pump installed.
Check out our video below to see a seal removal in progress…
