ok guys, the problem its that there is re-occuring water in the oil pan. :wtf: I have an oil catch can and that seems to get water in it fairly quickly. There is about an ounce or two per oil change. When I change the oil it runs poorly off and on for a few days and then gets it out of the system and runs smooth til the next oil change. I thought blown head gasket or cracked block, but there is no smoke or power loss. Motor is a B16 head and B20 block w/ stock internals. Let me know what you think.

 

whats the oil look like does it have lite brown color or close to that it might be coolant from a cracked block, you do any test yet

and whats up with the catch can if you think it might be causing take it off for one oil change and see if that is the problem and maybe check for leaks or a better way of installing it