Well when all is quiet in our MS all I hear is the ringing in my ears from years of flying helicopters, my dogs moving around, my snoring (wakes me up) and a few other nocturnal sounds made by me and the dogs. Notice, I have left out my DW. She'd kill me if I added her to this discussion.
So, we run a fan full time to mask those unmistakeable noises living creatures make.
Now that I've got that out of my system:
If you were low on fluid, that may account for the noise and you may have air in the system. But you need to account for the leak. Maybe fittings loose?
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Olympic Peninsula, WA
2008 3500HD LTZ CC 4X4 Duramax/Allison /Banks IQ / Economind tuner / SpeedBrake
2013 MS 38RESB3 #6393, modified with ES stuff & Garnet Paint
"The older I get, the better I was!"
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