Dont know what going on ,i changed the clamp,also water pump was replaced days ago along with timing belt,1jzgte twins.stock still.clutch fan.

 

is the hose to big???only thing i can think of since you already changed out clamp....in other words is it factory..

 

Yes factory hoses,its come off 2 times already the one from water pump.and the one from top of radiador came off once only.ireplaced the clamps with srew types and am watching it and i can see it making its way off again (the water pump hose)

 

this started happening after timing belt,water pump,was replaceddays ago.

 

Worst case get some emery cloth or sand paper to rough up the water pump fitting. You could also pick up some of the silicone belt and hose dressing to help it adhere to the water pump and radiator.

 

so you dont think its nothing else?the radiator is not too old and thermostat seems to be ok???

 

If nothings cracked or collapsing on itself, I really can't think of anything else. Another thought could be that the hoses were degrading from the inside out getting saturated with coolant rendering them slippery when in contact with plastic and metal.

 

yea amkes sense,thanks bro.

 

I know its rare, but I almost wonder if its got a HG leak and is pressurizing the coolant system.

 

I've only seen this happen once around my area, it is a possibility though. Let's hope it's not the case.