Fluctuating coolant level ?
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
Mine did the same as yours right after the flush/re-fill. Took a couple trips but now it is stable -- I was always adding fluid, never needed to take any out. I think that is why it's called a degas tank. I chalked it up to taking a while to work all the air out of the system.
I only occasionally check it now and only cold on level ground...
I only occasionally check it now and only cold on level ground...
Tuned
Joined: Dec 2013
Posts: 399
Likes: 38
From: Rockport, TX
I recently did my drain and fill (5 times). I've only driven once since then and had to add about a quart of distilled water after the trip (I have the "min" sticker on the degas tank).
I'll be going on another 200 mile trip this weekend.
I'll be going on another 200 mile trip this weekend.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
I just added that to show what tool will make it easier.
If you stable then you should be ok unlike some of the mid-engine
little cars that an air bubble will spell an over heat.
One think you can do is squeeze the upper radiator hose to
force out some of that bubble.
Sean
If you stable then you should be ok unlike some of the mid-engine
little cars that an air bubble will spell an over heat.
One think you can do is squeeze the upper radiator hose to
force out some of that bubble.
Sean
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Just to add to the consensus, my truck fluctuates also. I was puzzled and did the sharpie thing like Miles did and it always drops when warm and comes back to the same place after sitting overnight. Seems like if anything the coolant would expand and the level would RISE when hot and drop back down when it cooled. I don't get it but the temps are good even towing on hills so I quit worrying about it.
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Senior User
Joined: Mar 2010
Posts: 348
Likes: 0
Just an update......For what it's worth, I drove the truck about 60 miles on Fri. with the heat on. When I got to my destination I squeezed the upper radiator hose a few times while the truck was still running and hot to hopefully help to work out any air that may be trapped. After sitting at the house over night I had to add approx. a pint of coolant to the bottle to bring it up to where it was. It seems that either running the heat or squeezing the top hose, or both helped to work some air out. Just wanted to let ya'll know FWIW. Haven't drove the truck since but hopefully that got it all out. Thanks again!
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