，please give me some advise how can i do with the expansion tank？
Optimus Prime
Well-Known Member
did you change the cap each time too ?
Irishrover
Well-Known Member
Surely the expansion tank cap is the "Safety Valve" for the cooling system and should relieve any excess pressure over and above what the system is designed to work at ????
Even on old motors, where the filler cap was mounted on top of the radiator, it was spring loaded in order to lift and relieve the excess pressure through the overflow hose rather than explode the radiator. The caps were stamped with the relief pressure dependent on the engine/model .
I feel sure that the expansion tank cap is designed to relieve any excess pressure, rather
than let the plastic tank take the strain and blow.
Even on old motors, where the filler cap was mounted on top of the radiator, it was spring loaded in order to lift and relieve the excess pressure through the overflow hose rather than explode the radiator. The caps were stamped with the relief pressure dependent on the engine/model .
I feel sure that the expansion tank cap is designed to relieve any excess pressure, rather
than let the plastic tank take the strain and blow.
Optimus Prime
Well-Known Member
that's why I was wondering if he changed the cap each time too. If it fails to release at a certain pressure, it will over stress the header tank
