The destructions for the cleaner say to run the for only 30 mins? The cleaner I used said 6 hours. It does sound like it has improved. The loose clamp may allow air in during cooling, but I would also think it would allow coolant out when hot since the system is under pressure.

Ha, mad wife hey?! <img src="/forums/images/graemlins/shiner.gif" alt="" /> I bet she'd be madder if she got stuck on the side of the road because you didn't bother to fix the truck <img src="/forums/images/graemlins/lol.gif" alt="" /> Ah, such is married life <img src="/forums/images/graemlins/kewl.gif" alt="" />