Aluminum threads are common and vulnerable to damage. On the magazine's XR650R motorcycle, we upgrade aluminum threads with Time-Sert® thread repairs. Here is the step-by-step Time-Sert® repair and improvement of the engine's outer crankcase/oil filter cover bolt threads.  My first exposure to a Time-Sert® repair was a cast iron engine block with pulled main cap threads.  A hefty carbon steel insert was the fix!  Imagine fixing the axle housing bearing cap threads on a Grand Cherokee's Dana