Quote:
Originally Posted by bvanlieu
Not normal. Check expansion tank for evidence of bleed off. Our tank showed dried residue by the cap and eventually the seal in the middle failed and you saw dried trails on all sides of tank.
New tank installed (went after market since quality german part failed in < 50K miles...)
- b
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I should have taken your advice earlier! My expansion tank cracked this week and, because this is my only vehicle, I had no choice but to take it into my local dealer (it was losing ~1 liter every 10 minutes of run time). Before the crack, though, it was leaking slowly from the seal. I could not see that earlier on, but as it got worse I started to see residue.
The cooling system on these cars is really dumb, in my opinion. The expansion tank is basically a pressure cooker made of plastic. We all know about the pump too, it was also built with weak plastic components and is prone to failure.