this is not my bronco but may help anyone with any engine. i bought a 91 grand am for 300$ with a blown head gasket. got it all back together and it runs but has no oil pressure. it wont even fill up the oil filter. there is a lot of sludge sitting in the oil passages that doesnt want to move. i have a can of sea foam detergent sitting in it right now hoping that will work. does anyone have any other ideas with out having to pull the pan? to pull the pan means pulling the whole engine on this one and i would rather not unless its the last resort.