Quote:
Originally Posted by berty987
I think the big question here is whether it's better to rely on the seals of the original bearing to keep the grease in and contaminants out , or a ceramic bearing relying on clean oil to keep it lubricated.
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A bearing filled with grease does always have a specific limited lifetime compared to bearings that are lubricated by oil. Guess that Porsche knows the lifetime here but this is of course only possible to calculate if the grease is kept inside the bearing.
However , original intention must have been a lifetime well beyond 200,000km
In Mr Rabys solution lifetime will probably be very good as long as there is no loose debris entering the bearing which cant be guaranteed. Just look inside your oilfilter every oilchange.
I guess that no double row bearing with the grease kept in place has failed yet.
The single row bearing was probably some kind of costcutting project as the IMS failures where uncommon the first years and there was room for lower spec of the bearing.
When it is time for my next clutch I will,( if they exist) use a standard bearing but with upgraded seal spec and grease that can take more than 120 degrees C.
This will be done in combination with a low temp thermostat and 10/40W oil
Until then I will feel very safe with the IMS guardian.
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