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#4604501 - 12/15/17 01:17 PM GM Overflow Coolant Tanks Behavior
dogememe Offline


Registered: 04/15/17
Posts: 448
Loc: SF BAY AREA, CA
So if my coolant tank is overfull why is my radiator not full? I don't get it. I know it sounds like such a simple question but if I completely fill my radiator I can watch the fluid go to the overflow tank, but it seems like it doesn't wanna do it the other way around?
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#4604512 - 12/15/17 01:24 PM Re: GM Overflow Coolant Tanks Behavior [Re: dogememe]
PeterPolyol Offline


Registered: 03/06/16
Posts: 1172
Loc: toronto
This is happening on the Burb?

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#4604535 - 12/15/17 01:38 PM Re: GM Overflow Coolant Tanks Behavior [Re: dogememe]
Billbert Offline


Registered: 10/09/09
Posts: 342
Loc: California
Prolly time for a new radiator cap
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#4604566 - 12/15/17 02:13 PM Re: GM Overflow Coolant Tanks Behavior [Re: dogememe]
Chris142 Offline


Registered: 06/05/03
Posts: 16534
Loc: Deplorable in apple valley, ca
Bad cap or a leak. If there is a leak it cant vacuum the tank back to the radiator.
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#4604904 - 12/15/17 08:40 PM Re: GM Overflow Coolant Tanks Behavior [Re: Chris142]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5227
Loc: Fort Lauderdale, FL
Originally Posted By: Chris142
Bad cap or a leak. If there is a leak it cant vacuum the tank back to the radiator.


Exactly. If there is a leak, it will be enough to let the engine pull air in, but not let coolant out. Air replaces your coolant, and the rest is history.
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#4609273 - 12/20/17 11:54 AM Re: GM Overflow Coolant Tanks Behavior [Re: dogememe]
dogememe Offline


Registered: 04/15/17
Posts: 448
Loc: SF BAY AREA, CA
Originally Posted By: PeterPolyol
This is happening on the Burb?


Yes.

There is a slow drip from one of the heater hoses so I will fix that and replace the radiator cap and see what happens. If it still does it, I will report back! Thanks all smile


Edited by dogememe (12/20/17 11:55 AM)
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2007 Crown Vic 4.6 ~122K: Daily Driver
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7K Mile OCIs with Valvoline Advanced Synthetic/SynPower 5W-30

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