The clutch pilot bearing is installed to the back of the crankshaft, comes pre-coated with grease and is not serviceable, its purpose is to support the input shaft of the transmission/transaxle. It should be inspected every time when the clutch components are removed from the engine, and if it is questionable due to the inaccessibility of the section it is better to install a new one. It should be noted that if the engine was removed from the mentioned mean of transport, some of the actions are not performed. Start with the removal of the transmission/transaxle followed by the parts from the clutch. Examine bearing for such signs as excessive wear, scoring, failure to have adequate grease, being dry, or visible damage; where any of these signs are evident, new bearing must be purchased. Regarding the removal there is a slide hammer that comes with a puller attachment and can be obtained from auto parts stores or equipment rental yards. Before fitting of the new bearing, apply multi-purpose grease lightly on the outer periphery, and then insert it into the counter-sink with the help of hammer and bearing/bushing driver and fit it in such a manner that the bearing seal is towards the transmission side. If a bearing driver is not an option then a hammer and an appropriate socket size can gently be used to force the bearing into place however it has to be ensured that the bearing does not get cocked in the bore. Lastly, it is recommended to reinsert all the other components like the clutch components, transaxle, and all other removed parts makes sure all bolts and screws are tight enough.