Radiator reservior overflow - Defender Source
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Old February 27th, 2004, 11:38 PM
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Jeffrey Rosbrugh
95 D90 ST #2585
Join Date: Sep 2003
Location: Wrightsville Beach, NC
Posts: 102
Radiator reservior overflow

I have been noticing recently, after topping off the coolant reservior on my 95 NAS 90 a slight smell of coolant when running the heater. As you can imagine, the initial thought was a heater core, but now I am not so certain. While attempting to figure it out, I noticed coolant seeping out of the overflow hose coming off the neck of the reservior, past the cap. The only time this occurs is if I fill the coolant to the neck. Is this normal? Should I leave some air in the reservior, or fill it to the top? This seems strange. I pressure tested the coolant system (but NOT the cap) and it held pressure fine for several hours till I released it. Anyone with any clever suggestions? I will test the cap tomorrow, perhaps it has gone south? Thanks!

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Old February 27th, 2004, 11:51 PM
Mike Hippert's Avatar
Mike Hippert
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94 D-90 Grinding Rover
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Location: Manchester NH USA
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When you fill the overflow tank you should only go 1/2 way. That way you leave room for extra coolent to flow into the tank. If you fill it to the top it will and should overflow.
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