Not a lot of information to go on but if I have understood you correctly, you have lost compression! I will need to know some things, e-mail me your answers, trit666@hotmail.com .
1)Do you lose your collant water?
2) Is there water in your oil or oil in your collant water?
3) Has your cars performance halfed?
4) Is your mangement light on?
5) Do you have any black smoke coming from your exhast or steam/water.
6) And when did this problem occur?
Kind Regards
Tristan Hanwell, April 2006