Originally Posted by culaslucas
Just added an '02 S6 Avant to my Audi collection ('01 A4 TQM Avant). It has about 135k miles and looks pretty well cared for.
I'm not new to Audis but am certainly new to this size of an engine. I'm curious as to what specific issues I should be aware of and what might be different from my 1.8t.
Check the inner and outer CVJ boots on the front....the outers tend to go first, but at 135K miles and 11 years, the inners if not the lubricant are often contaminated.
I just dropped the front axle on my 2K4.2A6 because I noticed a little spray from the inner CVJ boot, brownish rather than blackish. Turned out the boot was ok, the clamp was leaking...but the juice was brownish mousse compared to the black stuff in the tube for the inner CVJ (actually it was a triple roller joint but WTF). So I replaced the inner boot after cleaning up the triple roller joint and housing and put it back together. Car had~175K miles on it.
I've only had one of the front CVJ boots (the inner one) go that far...the rears, OTOH, are OEM and I have no intention of replacing/servicing them until/unless they crack or leak.