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coolant-flow.jpg | Hits: 12061 | Posted on: 1/2/05
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Coolant Flow for 4.6L modular engine Note that: before the t-stat opens (engine cold), ALL of the water pump's pressure goes thru the heater core. So the high coolant flow at that time will self-bleed any air out of the heater core, but it can also overpressure the core, which is why Ford is now adding a restrictor to many vehicles. See the TSB in this caption:  Smallblock V8  |
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