Quick question: can I run my heater with the belts removed to drain coolant?

[velocity_b]

Hey guys,

So I'm taking care of my oil filter housing gasket this weekend and while I'm in there I'm doing a coolant system refresh since my thermostat just started acting up.

I have the ofh gasket replaced and all of the belts have been removed but I forgot to drain the coolant before I got started.

My question is, can I run the heater with the engine off to drain the coolant with all of the belts/the fan removed?

[ELCID86]

With the engine off? Just the blower?


Thumbs, iPhone, TaT.

[velocity_b]

Correct, that's the plan... Should be okay?

[ELCID86]

Yes. One of the DIYs recommends running it on high iirc.


Thumbs, iPhone, TaT.

[velocity_b]

Thank you sir.
Yeah the one I have says 91 degrees low fan.

[danewilson77]

I've only performed this action on fill, not on drain.

That's not saying it won't facilitate draining though.

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[BMWCurves]

Yes. One of the DIYs recommends running it on high iirc.

Yup, one of the DIYs I used for my cooling system overhaul suggested it as well to get all the coolant out of the heater core (link: http://www.bmw330ci.net/maintenance/completecoolant.php).

[ryankokesh]

Yup, I've heard that but not done it.