2010 Audi S4: Engine Cooling Fan started running super loud when driving.

Soldato
Joined
19 Oct 2002
Posts
2,702
Location
Auckland, New Zealand
Hi

My partners S4 had a hiccup today, the cooling fans feeding air to the engine cooling system ramped up to super loud volume that she could hear in the cabin while driving but only lasted a few seconds after turning engine off, and was intermittent... never happened before apart from briefly during super hot weather. I had my Vagcom equivalent app running in it this evening and the coolant temp while revving engine wasn't really reaching above 90c and dropped when I took my foot of it... I'm going to give it a good run tomorrow with the app running and monitor the temps directly but has anyone had a thermostat fail in their B8 S4 before as it appears the US market was quite susceptible to them occurring anywhere before 100K miles.

Car was imported from the UK to NZ and has done 131000 kms and hasn't had it replaced yet. The water pump is a metal unit so its not going to be that, just hoping its not the well documented thermostat failure that costs a fortune!

Chris
 
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