Well, it's time to drain the oil and PRAY! A blown head gasket doesn't have to open into a cylinder.. it can open a passage between oil and water jackets. If this is the case drain it quick, the moisture in the oil pan could destroy all of the bearings in the lower end.
If nothing turns up in the oil pan, drain and flush the coolant system (thoroughly). Refill it and pressure test the coolant system to about 14psi. If there was coolant in the oil pan you may want to do this with the pan's drain bolt out.
Hopefully it is a BHG... otherwise it could be a crack in the block.
|