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Old 04-08-2014, 07:19 PM   #1
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Coolant Capacity

I've looked through my manuals and can't find the total capacity of engine coolant for my coach (see signature). Can anyone help out?
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Old 04-08-2014, 08:39 PM   #2
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call it 13-ish gallons.
What I do is buy test strips at my local NAPA Parts, Truck Counter. Then,
Twist open the radiator petcock & drain whatever comes out. I get about 7.5 gallons. Close petcock.
Then open the engine hatch about 2/3 way. Twist off cap from surge tank & remove, store where I will ultimately forget where I put it down. Prop the funnel w/the looong flexible neck between the engine hatch & rear cap; put filler neck in surge tank. Dump in 3 to 4 gallons of diesel coolant concentrate, plus 4 to 3 gallons, respectively, of distilled water. These go in surprisingly fast.
Cycle engine On for 3-5 minutes to circulate new coolant. Run a test strip.
Repeat again in 2 years.
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Old 04-09-2014, 01:32 PM   #3
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Mike (aka Koop),
My owners manual says 10 gallons (TYP). I think (TYP) means typical. However, I would surely go with Engineer Mike's 13-ish gallons. Additionally, I'm surprised E-Mike didn't mention a pretty cool upgrade (no pun intended) that he shared with me at Quartzite earlier this year... On his advice, I bought a generic white plastic (semi-transparent) coolant recovery tank and mounted it to the left side of the OEM recovery tank on the inner frame panel. I ran the OEM overflow tube to it, so now I have a recovery tank for the recovery tank! Now I can easily see my coolant level instead of relying on the little OEM sight glass plug which can give an erroneous reading because a little bit of coolant always seems to collect just in front of the glass, even when the level is actually low. I will try to take a picture of my install when I get home today and post it for you, in case you think it's something you might want to do as well.
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Old 04-09-2014, 01:40 PM   #4
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Thanks David. Please post a pic. A recovery tank for the surge tank WRV used is a good idea.
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Old 04-09-2014, 01:54 PM   #5
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Here's a picture that I took at Quartzite just before installing the recovery tank.... If you can zoom in on the picture, you will see the newly purchased recovery tank still sitting in it's wrapper next to the OEM tank. I will take a better picture when I get back to the Coach this evening.
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Old 04-09-2014, 07:08 PM   #6
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Here's the pic I promised:
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Old 04-09-2014, 07:53 PM   #7
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Thanks for the pics David. Your 2005 is laid out a little differently than my 2003. But the general idea still applies. Thanks again.
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Old 04-09-2014, 08:38 PM   #8
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Agree--the sight-glass in the recovery tank can be misleading but remember, the engine must be at ops temp for the sight-glass to provide an accurate reading. Try checking it cold and you will overfill everytime--then you will truely need an overflow tank for your recovery tank [smile]....
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Old 04-20-2014, 04:42 PM   #9
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where did you purchase the extra tank?
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Old 04-21-2014, 10:21 AM   #10
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Quote:
Originally Posted by djdobbins1 View Post
where did you purchase the extra tank?
Purchased at local auto parts store in Quartzsite AZ. Forget the name. They had two sizes of generic overflow tanks in stock to choose from. Both types that I saw come with mounting brackets and cheap hose clamps. Use your own judgement when purchasing. Personally, I purchased separate mounting bolts (stainless) with flat washers on the bracket side and lock washers on the nut side. Also, I happened to have better quality small hose clamps on hand, so I used those.
Should be able to find these at Autozone, Checker, Advanced, Pep Boys, etc.,
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