My Peugeot 307 looses coolant, garage has checked but cannot find where, is now staining matwell on passenger side white where heating vent is does anyone know what this could be or how much it may cost to repair ?

Jackie, Stockport, June 2012

Thanks all for your answers that's a really big help, better than the garage I took it to !!

Jackie, June 2012

Sounds like your heater radiator, or it's connections are corroded. Try Radweld, add into top of the main radiator, not the expansion tank, and then run the engine for about 10 mins without driving, with the heater control on Full/HOT and aircon off. It will get warm in there. Do not leave your car unattended with the engine running, as it will be nicked. Costs about £7 from any car spare shop.

Andy D, June 2012

My daughter had this happen and the answer was a new heater matrix. Not a cheap repair I'm afraid. Several hundred pounds with all the labour involved at the Peugeot main dealership.

ChicksFan, June 2012

try a k seal in the water as this sealed mine and its still working ok.its a 50 /50 chance it will seal it but worth a try

bob, June 2012

you could check your matrix hope this helps

raza, June 2012