I just wanted to verify that the only reason coolant would be pushed into the reservoir would be a BHG, correct? It's not overheating, but when it gets to normal operation temp, it is pushing out coolant. I've read some other threads and it seems that a BHG is the reason....Sucks because I just went through all the trouble of doing valve stem seals with the head on... Oh well. Oh, and if anyone has a good link to a thread describing the best wat to tackle a HG, I would appriciate it!