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11-17-2019, 08:44 AM
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#1
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Winnebago Owner
Join Date: Nov 2017
Posts: 71
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2007 Journey C7 Coolant Change
The time has come to R+R the C7 engine coolant.I have talked to Winnebago Tech Support about weather or not the water heater coil and drivers area heater core would drain to the rear and the response was that they should but the tech didn't make me real confident any suggestions on the process will be appreciated thank you. Happy Trails
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11-19-2019, 07:39 AM
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#2
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Winnebago Master
Join Date: Jun 2013
Location: Full-timer/volunteer w/SOWERS
Posts: 2,737
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Quote:
Originally Posted by Chmielowiec
The time has come to R+R the C7 engine coolant.I have talked to Winnebago Tech Support about weather or not the water heater coil and drivers area heater core would drain to the rear and the response was that they should but the tech didn't make me real confident any suggestions on the process will be appreciated thank you. Happy Trails
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Take it to a popular truck service center.
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11-19-2019, 08:24 PM
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#3
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Winnebago Owner
Join Date: Nov 2017
Posts: 71
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I prefer to do my own work for alot of reasons but I do appreciate the suggestion
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11-19-2019, 08:47 PM
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#4
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Winnebago Master
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,177
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Just did some work on my heater core and the height of the surge tank in the rear of the RV forced around 1/2 gallon out of the hose. The heater core is of course at the height of the passenger's knees and it did puke some antifreeze when I first disconnected the hoses, because the surge tank is even higher. Not much was lost though.
So how high is your surge tank?
Also, you can use a flat blade style clamping tool made for heater core hoses to choke off any leakage when you pull off a hose. Then use a plug in it. Gives you more control of the situation. Eventually, you drop the heater core hoses down low and they'll drain from the engine until empty. Put a coupler between the supply and return hoses while you do the change. The heater core itself doesn't hold enough to worry about, I'd ignore it and not try to drain it. But if you must, blow it out with air.
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11-20-2019, 10:12 AM
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#5
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Winnebago Owner
Join Date: Nov 2017
Posts: 71
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Thank you for the info and reply I appreciate it
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11-20-2019, 10:40 AM
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#6
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Winnebago Master
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,177
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Thought I'd mention that the typical rear engine RV has two shutoff valves, brass, very close to or right at the engine. You can find them by following the heater hoses back to the engine. Smart but unscrupulous shops often shut those off so they don't have to worry about draining the heater hoses that go all the way up to the front of the RV (30 to 40 feet of 5/8" hose) and into the heater core so they save a couple gallons of antifreeze, and at $15/gallon, that's $30 to you at retail. But the invoice still shows the book amount of AF. So if you do take it to the shop, make sure you discuss whether or not they're going to drain the heater core and hoses. (Don't mind me, I tend to be suspicious of shops after decades of being taken advantage of, and/or dealing with incompetence in the service industry).
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11-24-2019, 06:17 PM
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#7
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Winnebago Owner
Join Date: Dec 2006
Location: New Hampshire
Posts: 82
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Once I drain the radiator, I disconnect the heater hoses at the shut off near the engine to drain any other coolant. I don't worry about small amounts that might be left behind. You can never get it all out unless you flush with water. I would rather change more often than do the flush.
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11-24-2019, 09:12 PM
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#8
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Winnebago Camper
Join Date: Sep 2014
Posts: 9
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Coolant change
Quote:
Originally Posted by Don G
Once I drain the radiator, I disconnect the heater hoses at the shut off near the engine to drain any other coolant. I don't worry about small amounts that might be left behind. You can never get it all out unless you flush with water. I would rather change more often than do the flush.
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What coolant are you using. I saw a long life fluid at Walmart that I’m thinking would be ok.It has all the big Diesel engines listed.
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11-25-2019, 06:40 AM
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#9
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Winnebago Owner
Join Date: Dec 2006
Location: New Hampshire
Posts: 82
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I use Peak Fleet Charge in the concentrate bottle and then mix with water to 50/50. You can by the water in the gallons to make sure you have no contaminates. Cat also uses in some engines the Peak Final Charge which is red in color. Yours should be like mine which is pink. It is also much cheaper when you can mix your own.
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11-25-2019, 08:58 AM
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#10
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Winnebago Camper
Join Date: Sep 2014
Posts: 9
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Antifreeze
Quote:
Originally Posted by Don G
I use Peak Fleet Charge in the concentrate bottle and then mix with water to 50/50. You can by the water in the gallons to make sure you have no contaminates. Cat also uses in some engines the Peak Final Charge which is red in color. Yours should be like mine which is pink. It is also much cheaper when you can mix your own.
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I have the original which I have to change . It’s green. I saw the peak final charge global already made up. I forget how much but I don’t think it was too bad. I think it called for 7 or so gallons. I’ll have to check. Did you get any air pockets. I have all original hoses too. Think they are synthetic but have to check also. It has 40 k on it .
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11-25-2019, 09:00 AM
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#11
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Winnebago Camper
Join Date: Sep 2014
Posts: 9
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Antifreeze
Quote:
Originally Posted by Don G
I use Peak Fleet Charge in the concentrate bottle and then mix with water to 50/50. You can by the water in the gallons to make sure you have no contaminates. Cat also uses in some engines the Peak Final Charge which is red in color. Yours should be like mine which is pink. It is also much cheaper when you can mix your own.
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Thanks for replying
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11-25-2019, 02:36 PM
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#12
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Winnebago Owner
Join Date: Dec 2006
Location: New Hampshire
Posts: 82
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I never had a problem after changing the coolant. It always seemed to self bleed from running at idle and occasionally increase the rpms to around 1200 for a couple minutes to get things moving. Make sure you put the dash heater on full hot to circulate the coolant into the heater core. Have you owned this coach since new? I think they all came with the pink coolant when new. You may want to drain the old stuff out and refill with straight water to flush out all the green coolant. I don't think its good to mix different types.
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11-25-2019, 11:18 PM
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#13
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Winnebago Camper
Join Date: Sep 2014
Posts: 9
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Antifreeze
Quote:
Originally Posted by Don G
I never had a problem after changing the coolant. It always seemed to self bleed from running at idle and occasionally increase the rpms to around 1200 for a couple minutes to get things moving. Make sure you put the dash heater on full hot to circulate the coolant into the heater core. Have you owned this coach since new? I think they all came with the pink coolant when new. You may want to drain the old stuff out and refill with straight water to flush out all the green coolant. I don't think its good to mix different types.
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yes unfortunately I’ve done most of the other maintenance items but I was once told by a mechanic that some of these items are not necessary. I only have 40 k on it . Not sure if the additives would be depleted. It is definitely green.
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