<HTML>Depends on where it is.....did it let the oil out of your clutch housing?.......or is it up by where the crankshaft is?.......those are both trouble, and could cause very expensive damage if your patch job falls off.........in those cases you should probably take it somewhere to get it welded........otherwise you can use an epoxy glue like JB Weld, Loctite makes one also.........they will cost about $4.00 US......and follow the instructions correctly.........you will have to make a patch out of another small piece of metal to cover it ........maybe 3cm by 3cm........and glue it on </HTML>