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OK well I got the new motor in and vacuum filling the coolant and it will not take a vacuum from what I can tell I hear air whistling from the weap hole when the vacuum bleeds off.... is this normal. there is no heater core, i have brand new hoses and all new gaskets, I dont suspect the radiator, so not sure if the pump is shot and the weep hole is bleed off the pressure?


sbc350
 

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could just be a bad water pump, or too much cap pressure.

i run a 23lb cap with a junk checker water pump on my race engine
 
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