I have a 2002 chevy blazer extreme 2wd 4.3l v6 I had a blown intake gasket and tried to fix myself well the leak there is no longer leaking but when I put coolant in it I can hear it pouring into the oil pan any ideas what I did wrong before I have to tear it all back apart any help would be much appreciated it ran just fine till this to so I don't think it's a head gasket problem but I could be wrong I've just never heard of a head gasket letting the coolant pour straight into oil pan like that

 

Welcome from Florida. Take the intake out again and check the gaskets to make sure they didn't get damaged.