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Thanks for the heads up, but mine is still tucked away for another month. Even if it wasn't I'm up to my elbows with projects. One of them is Marc's '89 S4. Want to get it ready before May1st.
Unfortunatelly can't tell if the heads are warped until they are off the egine. I'm off this Friday and was planning on going to see you. I'll bring a few tools to check out as much as we can. What time is good for you?
It could be only a stuck thermostat or a faulty water pump too. BUt is could easily be that the exhaust is pressurizing the coolant too. Does the coolant smell like exhaust? You shoudlbe easily tel, expecially when the engien is running. First take off the coolant cap and then run it intill it starts to boil over or before it goes into the red.