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Old 06-16-2024, 11:17 AM   #1
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Engine coolant in Oasis fluid

I have a 2019 Newmar Mountain Aire with engine coolant in the Oasis fluid running the plastic holding tank at the back of MH over. Any ideas i will have to travel at least two hrs to RV repair shop. We are leaving Tuesday for three wks. Thank you in advance for any ideas.
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Old 06-16-2024, 12:48 PM   #2
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Quote:
Originally Posted by Wallywkender View Post
I have a 2019 Newmar Mountain Aire with engine coolant in the Oasis fluid running the plastic holding tank at the back of MH over. Any ideas i will have to travel at least two hrs to RV repair shop. We are leaving Tuesday for three wks. Thank you in advance for any ideas.
It is unclear what is going on….
1) did you mistakenly add engine coolant to the oasis reservoir?
2) is there somehow a leak so that engine coolant is actively and continuously flowing into the oasis system?

If #1, then just drive, but keep a “nose” out inside the coach for any smell that might be engine coolant fumes (not healthy)

If #2, then go to your local auto supply stores or harbor freight and buy a couple large plastic hose line clamps/pincers. Gain access to the distribution module of the oasis. And clamp off the incoming and outgoing engine coolant lines. That should hold you until you get to repair … but stop often and check the clamps are holding.

Also, if#2, your engine coolant is likely now contaminated with oasis fluid … so you will need to have that fluid flushed and refilled
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Old 06-16-2024, 01:49 PM   #3
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There may be a shutoff valve at the engine for the coolant hose to the Oasis.
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Old 06-16-2024, 03:57 PM   #4
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If the Oasis is similar to an Aquahot there should be shut off valves on the engine heating lines.

Later...
Ray
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Old 06-16-2024, 05:01 PM   #5
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Check the level of your engine coolant. Don't let it run low.
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Old 06-16-2024, 11:24 PM   #6
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On the Freightliner chassis, on the driver's side of the engine, there are four heater hose shut off valves. Two for the dash heater and two for the Oasis unit. The Spartan chassis may be spec'd the same.

If you have coolant in the Oasis tank, you may have an internal tank leak. Keep in mind that the Oasis fluid is yellow and can change color to be more of a brown with age.
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Old 06-17-2024, 07:17 AM   #7
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Quote:
Originally Posted by RayandWendy View Post
If the Oasis is similar to an Aquahot there should be shut off valves on the engine heating lines.

Later...
Ray

Yes the should be a pair of valves (in and Out) Turn them off.
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