I have an 86 ranger that came with the 4D55 and I hop you guy's can help.
First is the 4D55 a revers flow cooling system?
Before I got it running I built a new radiator 19x20x2 it's a duel pass cross flow.I put 8,000 miles on it after and then developed an over heating problem. It will get up around 240* in about 2 miles top hose is hot bottom is only warm. I have tried 3 thermostats of two different brands, a brand new water pump and got no were. Then discovered a blown head gasket and rebuilt the hole engine(it was shot any way) and it dose the exact same thing. I don't know what to do, any and I mean any idea is appreciated.