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Posted on Jan 02, 2017
SOURCE: Audi A4 95 2.6 Abc engine
To be honest, I don't have any experience with the 2.6, but from the sounds of it, you have coolant flow through the upper hose (which would explain why it's hot) and none through the lower hose (which is why it's cold). One resource you could check is www.vagcat.com - sign up (free) for your car and drivetrain, and it should show you everything you need.
Posted on Sep 14, 2008
turn your heater on to max heat and high fan. then see if you can feel the hoses on the firewall for heat they should be hot. make sure that the fan unit on the radiatoris working if the upper radiator hose is hot the fans should be running if they are not that means that either the relay is bad the thermo sensor is bad or the fan unit is shot... please rate the solution..........thanks
Posted on Sep 24, 2008
you should have hot water on all rad. hoses when the motor is running at a norm. temp. the water is not going through the heater core like it should. you have cutoff valve bad low water are a stopped heater.try a hoter thermostat if none of the above are true.
Posted on Jan 18, 2009
I think you could be right about there being air trapped in the system.
Or the heater core(radiator) is plugged.
Either way you need a pressurized radiator coolant pump to put the coolant in without air being trapped.
Although,i have seen it done by jacking the vehicle up high enough that the radiator was now higher than the heater core level, and then the coolant was put in.
But this is dangerous to try.
Posted on Jan 29, 2009
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