[Tom Wells]

Dirk,

Don't know how far you've chased the trapped air but this turned out to be my major problem. Once cured, my car runs cool regardless of speed.

Burping the cooling system is vital and frustrating. I have to cycle mine at least five times (cold to warm to cold) and between, remove the cap and squeeze the hoses to get the air out. Then cycle again. When I can no longer observe any air bubbles when I squeeze, it's done.

Through all of this, the overflow reservoir needs to be kept nearly full so when the car heats up the water goes into the overflow, then returns to the radiator without sucking in any air from a nearly empty reservoir.

As a second thought, there's a thin metal plate that goes behind the 460's water pump along with a second gasket. If this plate is omitted, overheating will result.

Hope this helps,

Tom