I've made some upgrades to the cooling system of my '58 bird (w/61 390) and I'm still having problems. In the last two weeks, I did a chemical flush of the cooling system (60 min acid cleaner, 10 min neutralizer, 5 min pure water, then refill with coolant/water mix) and I also installed a hayden 7 blade flex fan. No shroud yet.
Now, the system seemed to stay cool and sealed until I get the engine much over 2500 rpm. At that point the radiator begins to boil over all around the overflow tank cap. Once it starts it keeps boiling until the engine is cool again. Today on my way to work I lost about a gallon of coolant over about 30 miles of driving. I topped off the coolant before driving home, and carefully kept under 2500 rpm. Temp was fine and no boil over.
What is going on here? I know there is still scale and rust in the cooling system, as the waterpump inlet to the heater still has lots of junk in it. Do I need to flush the system again? Is my fan belt too tight? Is this a symptom of a more serious problem?
I appreciate the help!
Mel
Now, the system seemed to stay cool and sealed until I get the engine much over 2500 rpm. At that point the radiator begins to boil over all around the overflow tank cap. Once it starts it keeps boiling until the engine is cool again. Today on my way to work I lost about a gallon of coolant over about 30 miles of driving. I topped off the coolant before driving home, and carefully kept under 2500 rpm. Temp was fine and no boil over.
What is going on here? I know there is still scale and rust in the cooling system, as the waterpump inlet to the heater still has lots of junk in it. Do I need to flush the system again? Is my fan belt too tight? Is this a symptom of a more serious problem?
I appreciate the help!
Mel
Comment