picked up a fiat panda about 12 months ago low mileage very clean 59 reg, you could see it had been looked after , after about a month started hearing a wooshy squeaky noise from the cam belt side of the engine, stripped it down belt was just starting to show cracks on it, so fitted a gates belt new adjuster and water pump but it back together started it and the noise was still the louder for a few minuets then settled down to be the same as before so decided to run it for a bit see how it goes, six months later still there and the water pump started leaking ,striped it down again the sealant i bought for the water pump had sort of washed away parts shop sold me the wrong sealant by the way manual says no gasket is fitted, bought the right stuff and another water pump as i dropped the other one and broke one of the impellers , new pump as a gasket so fitted it with the sealant , but it all back together and the noise is still there some times load sometimes quiet its driving me mad , and i need to go on a few hundred mile trip soon, anyone got any idea what it could be.