Good afternoon, dear people... I need your advise.. I have an 85 Yammy SRX, slowly looking better as ive been fixing it up.. anyhow, did an oil change, changed filter, few days later ai noticed a little oil seeping from the oil filter cover (this model has the filter on the r side of the engine, just above the hole for topping up). I thought id check the bolts as i did not tighten them that hard as i have destryed some bolts in the past.. maybe a little more.. really i was retarded bcause even though it didnt have a gasket when i pulled it out, it wouldnt have hurt it to put one... anyway three bolts, two long on top, one short on the bottom.. as im looking at it and retightening the top right....yeap..screw goes loose.. i slowly pull it out and the screw thread is intact but the thread is on it.. so i stripped the hole.. now.. one advice was to put a helicoil in it.. cant find a helicoil kit so far.. could i retap a thread.. or stick a self tapping metal bolt just a little bit thicker than the original? or would that crack the case?? if i went to do that, would i have to warm the engine up (ie run it for a bit) so the metal gets softer?