Re: 2012 A6 quattro 3.0Tdi EGR coolant leak advice –
12-11-2020,09:21 PM
Ive had the same problem on my BiTdi and replaced all the o rings under the intake manifold. Whilst it was apart i managed to find a brand new genuine EGR cooler for 100 instead of the 760 audi want for it. The main culprit is the black plastic regulating valve. its a bit crappy and fails regularly. Not too bad at 66.
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