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Old 12-11-2007, 07:05 PM
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ironj32 ironj32 is offline
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draining the heater core

I was wondering how you go about draining the heater core...my main question is where the heck is it? I am told I probably have to blow through some hoses to force the water out. I have a 2000 LTR engine, on a 2000 XStar. Your advice is greatly appreciated!
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Old 12-11-2007, 07:25 PM
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Remove the two hoses from the engine block and blow through one with an air hose or you can put your mouth on one end and blow through it until all the liquid comes out. Then I would pour some pink RV antifreeze in one end of the hose and blow through it until you see a little pink come out through the other end of the 2nd hose.
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Old 12-11-2007, 07:51 PM
jrhollow jrhollow is offline
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jronj32, your just blowing out your heater core? It's been freezing in MN! I hope you have had it stored inside the last couple of weeks!
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Old 12-11-2007, 07:53 PM
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where are the hoses attached to the block? it's a v-drive so the engine is in backwards. do they connect to the filter thingy that the tranny cooler hose are attached to (on the starboard side)?

also where does the hose run that is attached to the water spicket? i believe that is the hose that supplies the water to the heater core? it looks like it runs up to the front of the boat?
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Old 12-11-2007, 07:54 PM
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oh yeah, it's been in a 60 degree garage all year. but my leather seats in my jeep freeze my pals every morning! it's time to get the jeep indoors.
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Old 12-11-2007, 07:56 PM
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Not sure about your particular boat, but most heater cores are mounted under the dash either in front of the driver or passenger. If you still have your battery in, turn on the blower and locate it that way. (hope you didn't let it freeze already up there in MN)
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Old 12-11-2007, 08:08 PM
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okay...then i think i have the correct hose. i just have to locate the return hose.
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Old 12-11-2007, 09:15 PM
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alright, got that all taken care of. thanks for your help everyone.
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Old 12-11-2007, 10:04 PM
bigmac bigmac is offline
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You only need to open one hose. Best to do that in the bilge. If you don't have one of the hoses on a double-barbed fitting (my boat came that way), just cut the inlet hose in the bilge and install one with hose clamps. Or better yet, use a flushing T, then in the future you can just unscrew the cap and drain it, and pump antifreeze through the heater core until you hear it returning to the manifold.
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