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OT How to burp 92 Deville heater core

B

blinwmiaol.com

Member
I am not getting any heat out of my 92 Deville. The stupid plastic tank radiator blew and I replaced it but now am wondering if the heater core is airlocked now not allowing any coolant to pass. The hose going to it is hot but the hose connections at the core are out of reach to see if the exit hose is hot. When I had the system drained to install the radiator, I disconnected the in hose and could blow air thru the core so I am sure it is open. The core has both hose connections facing down so it would not bleed itself automatically. I was hoping there was enough coolant pressure to push the air out but after 2 weeks still ho heat from vents. Fan is working at all speeds and I can hear the diverter door move when I take the CC temp down to its minimum. Any ideas?
 
Can you remove one heater line and push a slug of water thru heater with a garden hose? Kind like precharging it - forcing air out?
 
look up around the thermostat housing for a small plug in the casting. yours may have it. many of the new cars have bleeder for the coolant system because the radiators dont have the caps anymore, they are in the coolant recovery jar. we also have an attachment that hooks up to the shop air hose and draws a vaccuum in the cooling system. then fresh coolant is put in a bucket, a few knobs are turned and the vacuum pulls the coolant into the cooling system.
 
There are bleeder fittings that you can put in the heater hose to let air out when the engine is running.They come in brass and plastic.I used to loosen a hose clamp to let the air out before the water got hot.
 
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