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Got back from a 30 min local run today and thought I could hear a very low buzzing coming from under the bonnet (No - not atrapped bee!) Anyway I then saw the coolant was bubbling in the expansion tank. After a few more seconds the buzzing noise stopped and the bubbling stopped immediately. Strange ??
I gave the car another shortish run later and kept a close eye on the temp. gauge (normal) and checked again after parking up. This time I left the engine running while I popped the bonnet. All looked o.k. Stopped the engine and the coolant bubbled for about 20 seconds before stopping. No buzzing this time though !
Anybody else noticed this ? Can't be normal surely ? While driving along all is fine, not sure if I need to take to my local dealer to check it over. Car is 16 months old so plenty of warranty if any work needs doing.
P.S the electric cooling fan did not kick in , sometimes it does sometimes it doesn't. Coolant level also looks fine.
I gave the car another shortish run later and kept a close eye on the temp. gauge (normal) and checked again after parking up. This time I left the engine running while I popped the bonnet. All looked o.k. Stopped the engine and the coolant bubbled for about 20 seconds before stopping. No buzzing this time though !
Anybody else noticed this ? Can't be normal surely ? While driving along all is fine, not sure if I need to take to my local dealer to check it over. Car is 16 months old so plenty of warranty if any work needs doing.
P.S the electric cooling fan did not kick in , sometimes it does sometimes it doesn't. Coolant level also looks fine.