mrsmackpaul Posted 1 hour ago Share Posted 1 hour ago 3 hours ago, Geoff Weeks said: It has nothing to do with pressure, it has to do with an inverted U bend (at the top of the housing) that is above the inlet and outlet. It forms a pocket that holds air. You can have gravity or pressure on the coolant and it still will not cause the air to go below the coolant level to pass out of the pump. I could agree with Geoff, but we would be both wrong then The first thing people need to understand is what cavitation is It isn't just air in water Anyway I'm sure you'll have quotes and stories that will shoot me down in flames and I'm not getting into a I'm more right than you type of conversation We need to understand what cavitation is and what causes it and how a pump actually works and if air really got trapped that easily in coolant system then there would be bleeders all over the block and head and any little defect in the castings Anyway I'll leave you to think you're right as I'm only a dumb ass skippy the bush kangaroo from Australia ha ha ha Paul Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/30/#findComment-592104 Share on other sites More sharing options...
Geoff Weeks Posted 1 hour ago Share Posted 1 hour ago 11 minutes ago, mrsmackpaul said: if air really got trapped that easily in coolant system then there would be bleeders all over the block and head Paul No need for "bleeders" all over the block, because there aren't cavities that can trap air all over the block. Block has opening on top to the heads, heads have opening on top to the upper water rail, upper water rail has a vent to the degassing tank on top of the radiator. Yes, we could agree but then we both be wrong, as you say. Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/30/#findComment-592108 Share on other sites More sharing options...
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