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Old 04-25-2013, 07:50 PM   #1
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Burping radiator/ airlock?

I have an 84 carbureted 5.0, just replaced timing cover water pump and radiator. I stuck a hose in the t stat housing when I was done and turned the water pump by hand to flush the water jackets out. So I hooked everything back up and filled radiator and started it with the cap off so I could burp it. The coolant level only dropped slightly. And the coolant seems to just be sitting there stagnant and not flowing. I was only apple to get 2 and a half gallons in, I thought it was supposed to be like 4? I'm wondering if I have an air pocket or something blocking coolant from flowing? Aren't you supposed to see the coolant kind of rushing flowing through the radiator? Any help much appreciated

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Old 04-25-2013, 09:16 PM   #2
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I just replaced heater core and did coolant flush. Look for a place to open up the cooling system ( such as where your temp sending unit plugs into intake, or where return hose connects to intake just before t-stat.) fill the system until fluid comes out of wherever you disconnected it. This will allow air to exit. When fluid comes out, button everything back up. If you start motor you can see the amount of coolant circulating through the system with the rad cap off, but removing cap alone will not burp system well enough. You can also remove t-stat and drill a couple small holes to allow air to escape. If you recently replaced t-stat it may have one way openings so that air and water will flow out, but not in. Hope this helps.
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