[RockBit]

I have had my expansion/surge tank crack twice, and have had it repaired at a radiator shop both times. I can't remember the particulars about the first time (cracked in solder joint between tank bottom and tube to thermostat), but the second time it cracked was after a hard acceleration. It cracked in the corner of the tank top on the passenger side.

After searching, the most likely explanation is that the upper radiator hose is too stiff, and stresses the surge tank when the engine rocks over from torque.

Short of buying a new, stronger surge tank, does anyone have a suggestion for how to fix this?