Water loss in expansion tank and temperature light/alarm

2006 SKODA FABIA
118,000 MILES • 1.4L • 4 CYL • 2WD • MANUAL
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MATT COUSINS
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  • 1 POST
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
Nov 19, 2016 at 8:33 PM
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CARADIODOC
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  • 34,413 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.
Nov 20, 2016 at 6:34 AM
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