it a 1988 4x4 p/u, it got the 22re motor and tranny i dont know of the bat...
manual or auto ?
I was also thinking head gasket but U say the plugs are clean what about the tailpipe on start up.
I don't know off the top of my head if auto toy tyrannies have a oil cooler in the rad i think they do
but if U have one check the lvl