[JoePapa]

Thanks for the replies guys.

Lil SCAPEGOAT - I'll try triming the upper hose. I recently flushed the system about 3-4 times and added a gallon of a temperature reducing additive. This helped but didn't resolve the problem. I did notice the upper hose angle and pushed it down several times to flush out any possible air. Additionally, the front end of the car was up in the air on a jack and the top of the radiator sits taller then the intake. I also added anti-freeze.

69FbirdPhx - I did review that thread and there was a gap. I closed the gap up and even bought a replacement high flow mechanical pump. Still didn't fix the problem for idle.

Dave - it cleaned up very well. He was refering to the valves mostly. The block was decked and the heads were milled and it all squared up beautifully and checked out clean. That question was mostly referring to internal passages.


The problem is at idle, not when I'm moving. The radiator is fairly new (about 5-6 years old) so I haven't tried to get it redone - it's clean inside and has dual 1" rows. I think I should have opted for the dual 1.25" rows instead.

However... now that it's cooler out it runs fine. Maybe I just need to move to some place that doesn't get about 90 degrees in the summer? I'll figure it out eventually and will post the result when I find it - I'm more stubborn then the car


Joe Papa