Gonna repair the lower oil filter bolt threads on my '00 426 with my time Sert on my next oil change. Is it safe to do this while the engine is still together? Will packing the flutes of the bits with grease be enough to make sure no harmful particles get into the engine? Any suggestions or tips anyone can offer on the process are appreciated. Plan on using a 12mm insert, a previous stickied thread on here by gray says a 10mm at least. Thanks!