I've got the front in service mode now so I'm prepared to do the oil cooler. I'm considering pulling of the water pump to see if the drive shaft seal is causing my other leak. it's trying to find the parts that can be a little frustrating.
I’ve also done my front main seal as I thought that may also be a source of leak.
The rear had been done with every clutch change so I thought it was time to do the front main.
I’ve also bought the genuine tool to install the new front main as well, simple job if you have the tool.
Not sure if the S5 v8 has a front mount oil cooler but if it does I would check where the hoses go into the block. The B7 rs4 does. I’m not talking about the oil cooler behind alternator.
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The front main doesn't seem to be leaking but I'm considering replacing it anyway. Only the high revving V8s in the RS models got the front mount oil cooler as far as I can tell so I think I'm OK there. I purchased a borescope camera to see if I can get a better view of the area behind the water pump before I start taking everything apart.
Looks like fun times ahead.