i took the head off today and took it to a shop.heads no good.must have had tap water in it.water ports where almost into the seal for the cylinder thats how much they have been coroded.so maybe that was my problem area?and wow there where some head bolts that didn't want to come out of the head.so i orderd a new head today.going to be burning tire soon i hope. <img src="/forums/images/graemlins/lol.gif" alt="" />.so guys watch the ph level in your antifreeze.hard water doesn't like aluminum.