That looks like the one! £100, expensive mistake. Also looks like it will be very difficult to replace. Thanks for finding it, I had a crawl through some parts databases and came out with nothing, this looks identical.
Never heard of secondary air injection, dont suppose you know the purpose?
Definitely tempted to do the thermostat whilst I'm most of the way there, though it does add to the long list of things to do. Water pump has recently been changed as well as a "heater valve" so OK on that side of things.
Ordered the suggested coolant pipe mentioned in the tutorial. Managed to...
Ahh that's perfect, I hadn't come across that write up before. Thanks for sharing, highlighted some more parts and tools I need to order. Such a daunting job, hoping its not as bad as it looks when you get stuck in.
Ahh ok that makes sense, at least the belts are done then. I've got a friend who has VCDS so I'll borrow that for a bit, the codes were only pending so have cleared themselves which is frustrating.
Having looked around at a few tutorials, am I right in thinking the only parts I will need to do...
The car has some pretty extensive work carried out in 2017 where the engine and gearbox were removed from the car. It had:
Valve Cover Gasket both banks
Timing chain top cylinder head covers removed, sealed
Bank A vac pump replaced
V fan belt and supercharger belt
I bought a B8 S4 two weeks ago and unfortunately failed to pick up an oil consumption problem (private sale). Seems like I'm getting through 500ml every 300 miles at a guess (short journeys)... it might not be quite so bad, I've just ordered a dip stick to verify the MMI readings (assuming...