Antifreeze in two out of the back three cylinders?

Question

This is a follow up question. I posted the question below and then I got to work taking the heads off my engine. I got both of them off last night and out of the back three cyliners two of them have antifreeze in them. Myself and a friend of mine looked at the gaskets for both heads and didn't see anything wrong with them and we also looked at the heads to see if we could see any warpage or cracks. We couldn't see any. Any ideas? I posted the original post below so you guys would have all the details. Thanks for the help. My car is a 1995 Chevy Luminia with a 3.1 V6

This started back about 2 months ago. I was hearing a strange sound coming from around the serpentine belt. I had my brother look at it and he said it was either the tensonier for the belt or it was the water pump so I just replaced both. After I replaced the water pump, the noise did not go away and my car began to run hotter then usual. It was not running hot at this point just a noticable difference in the temp. Over about a week it begin to run hotter and hotter until it finally over heated completely and I changed the thermostat and put it in. I also put some radiator flush in. It said to add pure water(no antifreeze at all) to the flush and run it for about 6 hours driving time. It ran like a charm for about 5 hours driving time but then it over heated all of a sudden. I was driving the interstate when the temp shot up and I started to pull over then it went back down. It did this about three time then it over heated. I pulled over to let it cool down and then I got home(less then a mile from where I pulled over). I got home and I most of my water was gone. I drained the rest out and started to put antifreeze in and bleed the air out but I poured 2.5 gallons it. It should only hold about 2 gallons and it never got full. So checked the oil and it has antifreeze in it. Anyway after all of that I know I need to check the head gasket and few other things but I have no idea what I am doing or what tools I need. Any help or advice would be appreciated.

Answer 1

Your cylinder heads are cracked between the water jacket and piston cylinder. Only way to really find out for sure is to have them magnaflux tested at a local engine rebuilder.

Hope this helps

Answer 2

if you had anti freeze in the oil than your head gasket has blown out and this is where you got the antifreeze in the cyclinders..