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Old 07-20-2010, 01:52 PM   #1
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Three Questions

I own a 2000 Winnebego Ultimate Advantage 40' Freigtliner Chassi, first questions my heater core has a leak any solutions on how to fix as it looks like impossible to replace, next when I run cold water in my kitchen sink the water comes out black as for some reason it's comimg out of the everpurr water filter backwards, could I have the incorrect antifreeze in the coolent to cause the heater core leak as I purchased this unit six months ago, I do plan to have the coolent changed.
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Old 07-20-2010, 05:20 PM   #2
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You are going to have to replace the heater core. The wrong coolant would maybe corrode the engine block or even the radiator, but probably not the heater core.

Sounds like charcoal in the water - I'd replace the water filter ASAP.
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Old 07-20-2010, 06:48 PM   #3
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It sounds like the everpure water filter either needs changing, has just been changed and not been purged or has ruptured. What you describe sounds like carbon/charcoal is being leached into your water system. It also could mean you have to sanitize your fresh water tank.

To fix your heating core, remove it and take it to a radiator repair facility and they will be able to leak test it and solder the leak.
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Old 07-21-2010, 05:43 AM   #4
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I purchased my replacement core from Winnebago and had a local RV service tech replace it. It does look impossible to remove, but a flexible, slender person can get it done without removing the front cap or disassembling the entire firewall. Cost me about $300, 3 years ago. The dealer wanted twice that.

IMHO, the leaking is caused by dissimiliar metal corrosion and poor manufacturing. Don't know where your leak is, but mine happened right at the end of the core where the connections were. A lot of people have had this core fail in Ultimates, Journeys and Horizons....and those are just the ones I know about.

You can bypass the core by connecting the two coolant hoses together. I carry a plastic connector just for that occurence. It won't provide heat obviously but it will give you time to repair/replace the core and still drive the coach.

As for the charcoal in your water, the other posters nailed it.

Your coolant may be wrong or may be old, but in the end it's unlikely to cause leaks all by itself. As I said, I think it's just too many different pieces of metal coming in contact with a really good conductor.

Good luck with your repair.
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