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Old 12-07-2011, 10:00 AM   #1
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Heater Core Leaks

Has anyone messed with their heater core under front cap? Removal looks nasty. I'm hoping I'll luck out and have it be a loose clamp! I hate to open the AC system if . thx
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Old 12-07-2011, 01:39 PM   #2
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Rick,
Is your heater core dripping/leaking antifreeze or is your A/C system evaporator coil leaking oil/freon?
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Old 12-07-2011, 02:43 PM   #3
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What is year/make/model of your rig?
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Old 12-07-2011, 03:13 PM   #4
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Robi.1014

Other posts show he has a '95 Dynasty with 300hp cummins. Not sure if he still has it.
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Old 12-08-2011, 09:23 AM   #5
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It's definitely antifreeze. '95 Dynasty.
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Old 12-08-2011, 11:00 PM   #6
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I hope someone that has actually changed their heater core can help you out here. I've changed the blower motor, and that involved taking the dashboard apart.

I've worked on the water control valve, that's up front behind the front cap, and it was a bit of a bear to work on. If the heater core is in that front box behind the front cap, it's going to be a real patience tester.

Is the antifreeze leaking out front? Then hopefully it just might be one of the front hoses, or the water control valve itself.
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Old 12-09-2011, 08:18 AM   #7
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I had to have mine replaced. Monaco still is able to get you the part, $$$. I opted to have mine recored/ rebuilt. The AC had to be discharged an recharged. It was about ten hours labor, as I recall.
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Old 12-09-2011, 08:30 AM   #8
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Check carefully and make sure it is not a loose clamp. i had a couple of customers pull the heater core and found the core not leaking. We found that you can have a clamp loose where the hose connects to the core. It lets coolant spray into the heater box and looks like a core leak.
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Old 12-09-2011, 08:51 AM   #9
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The leak is forward of the firewall. The core isn't under the dash. I have replaced a heater core, before, on another vehicle and discovered later that it was just a loose clamp! My AC needs servicing anyway. I'm just glad it's r134 and not r12. I can do the 134 myself. I want to get the front end up higher so I don't have to crouch ! The height of the Monaco front access door is awkward! And while I'm under there,,, I'm going to add another washer tank and pump,,,,,one for each wiper. The Dynasty windshield washers have always been wimpy!
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Old 12-09-2011, 09:58 AM   #10
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Rick, I have a 2001 Diplomat and I took the heater box that holds the heater core and evaporator off the front wall in about a 1/2 hour. My assembly was manufactured by SCS and I think they are out of business now. The box is held to the firewall by 4 #12 or #14 self tapping metal screws. On my coach I did not have to disconnect the A/C system hoses to lay it on the ground. I did take the tilting generator access door off to make it easier to stand and work. I have pictures of my assembly laying on the ground. George R. 2001 Diplomat
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Old 12-22-2011, 01:50 AM   #11
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heater core

Interesting as I also have a 95 Dynasty and just found the core leaking on our last trip in november when we needed some heat. There is a small drain tube in the bottom of the cover which will confirm that its internal or not pretty quick.
I picked up a new surplus assy (Acme) from Northwest RV in Eugene Or as we drove right by. I found out after that the unit is SCS? as the last post however a google of the the correct name will take you to the new group and parts are still available or a good rad shop can make a new core. Sorry I don't have the link to post tonight.( TRY scsfrigette.com/) FOUND IT!
Have not started to remove / replace yet but it's tight but doable.
Let us know
Greg.
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Old 12-22-2011, 06:22 PM   #12
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SCS/Frigette Corporation is out of business. Some of the folks that worked there now have restarted offering parts at the following:

Victory Climate Systems
8912 South Fwy
Fort Worth, Texas
817-293-3331
http://www.vcsemail.com/

Their mailing address is:

P. O. Box 40917
Fort Worth, TX 76140
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