Overheating Please help
01-07-2011, 10:57 AM
#11
AudiWorld Super User
Any car under 20 years old has heater flaps to control air going to the core. Running the heater at max does help with most vehicles.
Removing heat from the heater core causes a temp drop across the core. Warm water rises so this encourages circulation of coolant within the core.
Removing heat from the heater core causes a temp drop across the core. Warm water rises so this encourages circulation of coolant within the core.
Maybe the technique that I use is just different; I lift the tank as far as the hoses allow, pull the hose to expose the vent hole, then run the engine, at a fast idle until there is a steady coolant flow from the vent.
01-07-2011, 11:22 AM
#12
AudiWorld Super User
Yep, that's called the thermosyphon effect, which happens because the specific gravity of hot coolant is slightly less than colder coolant. Some early cars relied only on thermosyphon for coolant flow, no pump, for example the Ford model T. The flow is not much so cooling was marginal, which is one reason those early cars only had 20 HP or so. However when there is a coolant pump, that is going to move the coolant, heater on or heater off.
Maybe the technique that I use is just different; I lift the tank as far as the hoses allow, pull the hose to expose the vent hole, then run the engine, at a fast idle until there is a steady coolant flow from the vent.
Maybe the technique that I use is just different; I lift the tank as far as the hoses allow, pull the hose to expose the vent hole, then run the engine, at a fast idle until there is a steady coolant flow from the vent.
At the end of the day it comes down to getting coolant "behind" the thermostat so it will work, "under" the coolant temp sensor so it will read and "over" the heater core so it will heat.
And as you say there is more than one way of doing that.
01-09-2011, 10:42 AM
#13
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oh do you think this will help my heat problem also because im having that problem as well. Im starting to get mad at this car, its giving me a hard time right now. I tried flushing the heater core for a min and i got heat but later i added more coolant because i noticed it was overheating and i added more heat and it got back to cold.
01-09-2011, 12:45 PM
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no i'm too busy working... Good question though.i might do it today evening or tomorrow. Do you think bleeding will help with the heat also? because i saw diy for it somewhere.
01-10-2011, 05:33 AM
#17
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01-10-2011, 07:52 PM
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