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Coolant not reaching the heater core
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   Forward Look Technical Discussions -> Heating, Cooling and Air ConditioningMessage format
 
Paul Hettick
Posted 2019-11-28 6:23 PM (#590883)
Subject: Coolant not reaching the heater core


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Posts: 606
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Location: California
Recently acquired fury with a poly 318 the heater was not getting hot. Checked heater control valve, core, hose routing and everything checked out. Disconnected the heater hose at the new water pump and started the car and no coolant is being pumped through the outlet. Revved the engine and just a very small amount of coolant came out. Removed the new water pump and checked it against the old one and the impeller is on the right direction. Any ideas?
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willard77
Posted 2019-11-28 7:10 PM (#590885 - in reply to #590883)
Subject: Re: Coolant not reaching the heater core


Member

Posts: 14

Stuck thermostat?
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b5rt
Posted 2019-11-28 7:47 PM (#590888 - in reply to #590883)
Subject: Re: Coolant not reaching the heater core



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Posts: 2469
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Location: central Illinois
Drill a tiny hole in the thermostat so there's no air lock. Jack the front of the car up or park on a hill so the radiator is high. Fill with coolant and watch temp gauge as you wait for water to circulate.

You may also want to make sure there's no blockage in the heater core itself.
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BigBlockMopar
Posted 2019-11-29 5:49 PM (#590918 - in reply to #590883)
Subject: Re: Coolant not reaching the heater core



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Posts: 3560
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Location: Netherlands
Usually (depending also on heatercore design) there's an inlet and an outlet port on the heater core.
Hook up the hoses the wrong way and the heater core will trap air, deminishing its function, hook it up the right way and it will expell air from the core.

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Paul Hettick
Posted 2019-11-29 6:16 PM (#590920 - in reply to #590883)
Subject: Re: Coolant not reaching the heater core


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Posts: 606
500100
Location: California
I unhooked the hose directly from the water pump. No coolant is being pumped out of the water pump. Checked the thermostat and found it had been gutted. Not good on a new engine.
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Paul Hettick
Posted 2019-11-30 3:43 PM (#590941 - in reply to #590883)
Subject: Re: Coolant not reaching the heater core


Elite Veteran

Posts: 606
500100
Location: California
More bad news. Coolant is not circulating through the engine and there is a massive, internal vacuum leak.
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