MCI9 Heater core?

[jmblake]

I'm wanting to make sure I get all my old antifreeze out of the system and the over the road heater core is lower than the feed and return lines, so my question is there a petcock on the bottom of the core to drain it completely? I looked in the book and it doesn't show any and I got under the bus and didn't see any  so what would be the best way to get it all out? I thought about putting air to it and blowing it out but I don't know if that would get it all 
Jason

[bevans6]

If  you can put a shop-vac hose onto one of the lines and open the other, it will very quickly suck out all of the old fluid.  Works a treat.

Brian

[RJ]

Subject topic doesn't quite match the post's question?

Are you actually removing the OEM heater core for additional space, or simply changing the coach's anti-freeze?

[jmblake]

Brian, Thanks for the suggestion, I may try that.
RJ, I'm changing the engine and I'm putting new antifreeze in and want to make sure I get all the old out, its pretty nasty looking
Jason

[Scott & Heather]

Jason, I haven't forgotten you btw. Still sorting out our plans for the summer to see if we can fit the radiator into our budget. I'll be in touch


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[buswarrior]

Well, why not just flush it with water?

Strengthen anti-freeze to compensate.

You'll have to fool the valving to stay open, and then get more "stuff" to come out than just draining?

happy coaching!
buswarrior

[jmblake]

Scott, No problem, let me know
Buswarrior, Never thought of the valve, How could I fool the valve to stay open?
to bad they just didn't put a drain on the bottom, that would be to easy
Jason