i have just recently done a rs turbo rebuild ,i put on a genuine rs turbo head gasket from ford as i heard they was good,i also took of the oil cooler housing to paint the block,when started i have oil goin straight into the water ,thought was head gasket so removed the head to find no problems, cud it be posinle that a seal sitting on wrong on the oil cooler on these cud lead to this problem ? also any way these oil coolers can pack up ? cheers guys