Radiator neck at top of radiator developed pressure leak. Would leak at moderate engine temperatures. It wasn't super bad, but definitly a problem, as I drive a lot of distances. Anyhow the radiator was made of some sort of plastic, and the neck could not be repaired alone. I might have been able to glue it shut or somethinig, but I went ahead and had it replaced with a metal radiator. It cost 400 bucks to fix, as in replace. The new radiator is mounted differently on the chasis, with bolts now instead of tension clips. This might not be compatible with older ford probes.