Peugeot 307 coolant swashing noise under dash

I have had coolant drained, flushed and topped up. Still a swashing(coolant going through system) noise under passenger dash. Peugeot said it couldn't be fixed. System perfect. Just coolant going through heater radiator. This noise is loud enough and I need it fixed. Did anyone have same problem.

We had our own problems with a 206 - and we got a second opinion from another mechanic , and he fixed the problem is 5 minutes .( blown head gasket that was'nt blown )

Sounds like there is trapped air in the pipes .- did you try bleeding the system .

You should find a small plastic screw , on one of the pipes .

Try the Peugeot forums :

http://www.peugeotcentral.co.uk/forum-7.html

Whoever filled the cooling system didn't bleed it correctly. The Peugeot engines require the engine to be at a contant 1500rpm till the fans cut in to bleed correctly.

Peugeot Technical Advisor.