Hi Nathan or anybody on the blog. I have just got recently an E46 2005 60k miles on it.
We thought it was the cooling system.. So we have replace the lower hose, upper hose, expansion tank..etc.
Still overheating.. and temperature stay for a while on the middle, and then all the suddent it turn into red. Then I stop the car.. and wait to cool down again
I have just realize that there is not smoke nor sweet smell on the Exhaust however.. I see a lot of Fumes going out from the block.. My deduction it is that it may be a leak from the cooling system ( water..) into the engine..
Now I am writing here to see what it may be going on before I do any crazy ....
Nathan any ideas.... what it may be causing it.. May I have damage the engine already? Thanks