Tillycat1

17 hours ago, Stevey Y said:

Hi when they fitted the new expansion chamber did it have a new cap?, my daughters Q3 had the same problem which turned out to be the cap so we replaced it and its all happy days.

Steve.

Hi Seve,

yes cap was also replaced, so at a loss to what it could be.

Engine is fine when using as local runaround, coolant expansion tank never looses coolant.

On long journeys approximately 1 cup full of coolant is lost & specs of coolant are evident around expansion tank area. Temperature gauge on dash never increases above 90c, so no temperature related issues.

Had this issue now for 6+ months. Local garage have flushed through heater matrix & coolant pipes, etc connected. Last week coolant header support pump & coolant expansion tank replaced. Trip taken to Doncaster this weekend, approx 80 miles at average motorway speed, checked coolant approx 1 hour after arrival to find coolant reduced in expansion tank & specs of coolant around expansion tank area. Mechanic has checked for possible issues with head gasket & say no issues.

ANY Ideas most welcome as I'm tearing my hair out, what I have left!!😿