Why run heater when bleeding coolant?
08-16-2007, 06:38 PM
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Why run heater when bleeding coolant?
A buddy told me he bleeds the coolant without running the heater on. Says it heats up quicker and the fan turns on quicker. Ive always done it with the heater on. Is there a specific reason why the helms says to run it on?
08-17-2007, 03:28 AM
#3
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Re: Why run heater when bleeding coolant? (highrev1987)
You want the heater control **** set to full hot with the fan OFF. This allows coolant to circulate through the heater core where air bubbles can be found, as highrev1987 stated.
08-17-2007, 05:15 AM
#4
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Re: Why run heater when bleeding coolant? (spidermancivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spidermancivic »</TD></TR><TR><TD CLASS="quote">A buddy told me he bleeds the coolant without running the heater on. Says it heats up quicker and the fan turns on quicker. Ive always done it with the heater on. Is there a specific reason why the helms says to run it on?</TD></TR></TABLE>
B/c then you know when the thermostat opens.
B/c then you know when the thermostat opens.
08-17-2007, 06:12 AM
#5
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Re: Why run heater when bleeding coolant? (spidermancivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spidermancivic »</TD></TR><TR><TD CLASS="quote">there a specific reason why the helms says to run it on?</TD></TR></TABLE>
The Helms doesn't say this. But if you have the heater fan on, then it's blowing air across the heater core to get heat inside your car....which removes said heat from the coolant while doing so. You don't want that to happen when you're trying to get the coolant temp hot sooner rather than later.
And the thermostat isn't an on-off switch. It begins to open at ~170*F and is fully opened (1/3") by ~194*F. The radiator fan comes on at ~203*F. So if you let the radiator fan kick on, you can be assured that the thermostat already opened up.
The Helms doesn't say this. But if you have the heater fan on, then it's blowing air across the heater core to get heat inside your car....which removes said heat from the coolant while doing so. You don't want that to happen when you're trying to get the coolant temp hot sooner rather than later.
And the thermostat isn't an on-off switch. It begins to open at ~170*F and is fully opened (1/3") by ~194*F. The radiator fan comes on at ~203*F. So if you let the radiator fan kick on, you can be assured that the thermostat already opened up.
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