Water noise in Vauxhall Corsa (R)

[Sab]

When starting the car (and sometimes whilst driving) water can be heard from the engine. It sounds like it's running through all the pipes.
I checked the coolant and there was only a tiny pool in there. It was filled up only 3 weeks ago. I put water in it and started the car. I couldn't see anything. It was only later when passing the car I noticed water under the exhaust. So it seems the liquid is passing through there. Does anyone know what could have happened? The temperature gauze and switch were replaced 3 weeks ago. Could the mechanic have missed something? Spoke to him today and he says these things happen. But I seem to be having one problem after another. I was going to take it to Vauxhall but thought I would check if anyone here knows anything.

Thanks.

(And thanks for the previous help I got from a couple of you).

[Toureman]

These things don't just happen, he probably did not bleed the system properly after fitting the new parts.

[Sab]

Thanks. Is there anything I can do myself or should I take the car to Vauxhall?

[woodchopper]

Could be that there is an airlock in the system - ( you'll only hear the water being churned about when there is air in the system).
As Toureman says - he probably didn't bleed the cooling system properly after putting the new switch in.
water from the exhaust is most likely condensation after starting the car - it should disappear after the engine has warmed up - One of my Corsa's had the same problem - turned out to be the head gasket had gone and cost me �300 to repair - but if yours has only done it since the new switch was put in - i'll stick with the airlock diagnosis.
Wouold suggest taking it to a competent mechanic and get him to bleed the cooling system prorperly.

[Sab]

Thanks Woodchopper. I will try and get it checked in this coming week.
I've been a bit paranoid since getting the clutch replaced in June. Mechanics bodged things up and since then had to get it fixed by another mechanic which in total cost another �100. Been thinking to write to the garage to see if they would compensate. Was in June so not sure if worth it.
Anyway, thanks a lot.

[Big Bri]

if there is hot air in the car when heater is on it is not an air lock and the system dose not need bleeding . then its head gasket problem. is their any mechanics on this site

[PLIVELY34]

wouldn't agree with that big bri. doesn't necessarily mean the head gasket is gone. just mean s there's not much coolant going through the radiator. could just be radiator leaking and low coolant

[Sab]

Had a guy come round and check it last night - definately a leak somewhere. Said it could be that the last guy did not tighten a screw somewhere after replacing the switch and temp gauze. It got too dark so he will hopefully be able to check it out on the wkend.
Thanks for your replyies.