Water loss in expansion tank and temperature light/alarm

MATT COUSINS

MEMBER
2006 SKODA FABIA
1.4L
4 CYL
2WD
MANUAL
118,000 MILES

Coolant level dropping with no obvious water leek and temperature warning alarm sounding. The heaters are blowing warm as normal, but I have left the car running and the fan does not kick in. Any thoughts please?
Matt

Sunday, November 20th, 2016 AT 4:33 AM

1 Reply

CARADIODOC

MECHANIC
33,873 POSTS

When there is no obvious external leak, the best suspect is a leaking cylinder head gasket. Your mechanic can perform a chemical test at the radiator to verify that. The test involves drawing air from the radiator, while the engine is running, through a glass cylinder with two chambers partially-filled with a special dark blue liquid. If combustion gases are present, the liquid will turn bright yellow.