I found the souce of an oil leak beneath my 603 engine to be a small crack about three inches towards the passenger side from the drain plug. It appears to be weeping about 1 cc. daily. Seems that the best solution would be to remove oilpan and have it welded, but it appears that the engine would need to be raised or removed for the oilpan to clear the crossmember. Are there less drastic ways to seal the crack, as weld in place or JB weld? Thanks.