Great stuff old guy You continue to amaze me with your knowledge. Iv had this problem for a long time but have yet to see a definitive "how to". It seams every time this topic comes up some one has a different procedure to try.

I think my problem has to do with air entering the system at night when the engine cools down. Iv bled the coolant system probably 20 times now... Do you know how and with what i can use to cold pressure test the system?