Disappearing Coolant
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Postmaster
Joined: Jun 2004
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From: B/CS, Texas!!
Disappearing Coolant
I noticed that my reservoir tank was empty the other day. Well, I filled it a little over the mark. A couple days later the thing is bone dry again! I guess I'm looking at a leak somewhere? Any idea where it could be? The truck runs very smooth...no smoke, temp gauge shows Around the 'N' in normal. Thanks.
Post Fiend
Joined: Oct 2003
Posts: 6,214
Likes: 13
From: New Jersey
My crewcab did this for a year before I figured it out. The hose that connects the resevior to the radiator, had a split in it. When the radiator would draw fluid from the tank, the split would get "sucked closed" and not leak, and fluid would go from the tank to the radiator. Then when the fluid would go the other way, some of it would go into the resevior, some of it would open and exit the split.
Maybe not your issue, but it got me good for a year!
Maybe not your issue, but it got me good for a year!
More Turbo
Joined: May 2005
Posts: 560
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I think anywhere in the NORM area is good, mine was always at N before my gauges went south on me...
Last edited by MustangGT221; Aug 26, 2005 at 07:39 PM. Reason: Language filter tripped - plz edit profanity and abide by guidelines :)
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
My truck used to do that, but I never figured out what it was. When I put the 393 in the problem went away, so I guess all is good 
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Postmaster
Joined: Jun 2004
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From: B/CS, Texas!!
hahah, wish I had a 393 to make my problem go away .
Well, I'll check it tomorrow. Working late sucks, booo
.Well, I'll check it tomorrow. Working late sucks, booo
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I have a larger radiator and electric fan... my temp never really gets up to norm.. stays right below the N>.. is that ok? I had the same problem with leaky coolant line as well.. My reseviour line wasnt split but it was loose where it connected to the overflow reserviour... I zip tied it in place and now I dont lose coolant.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
A larger radiator won't over cool the engine if the thermostat is working correctly. Think of it as your house thermostat, your heater could heat the house up a lot hotter than 68-70 degrees if you left it on, but the t-stat keeps turning the heat on/off to keep that temp. The t-stat in your truck works the same way. Do you have the electric fan setup right so it comes on when necessary? That should be t-stated too, it shouldn't be on full blast all the time.
Also, it could be working just fine and the gauge is reading low. Air bubbles in the coolant system will cause the gauge to read low.
Also, it could be working just fine and the gauge is reading low. Air bubbles in the coolant system will cause the gauge to read low.
Postmaster
Joined: Aug 2004
Posts: 2,908
Likes: 2
From: West Mansfield, Ohio
If your reservoir tank keeps goin dry but your rad is always full, I'd look at that hose. Thats the only thing that makes sense really. My truck has a slow leak of antifreeze (I think its just a frost plug) but the temp always reads around 185-190. I'll fill the reservoir up to the cold fill and about 3 weeks later she'll be empty. 4 weeks later the radiator will be just a little low, just under the spout where you fill er up. Not too worried about it though
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