This happened to me a while back. I was tearing down a 327 out of a 69 Impala. When I cracked bolts for the main caps. Some sort of fumes along with a bubbly white substance came from underneath the bolts. Whatever it was it took my breath away. It smelled like a really strong chlorine scent. Has this ever happened to anyone else? Anyone know what the heck it was? /forums/images/graemlins/eek.gif It's only happened to me that one time.