Mysteriously losing coolant

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Old Jul 11, 2007 | 08:33 PM
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Default Mysteriously losing coolant

I have a been losing coolant at a pretty steady rate for the past month or so, about 1/4 cup of coolant out of the reservoir for every 100 miles of driving. I cant find any place that its leaking from. I did a did a radiator pressure test, and it lost about 1 psi of pressure in about 15 min but never dropped anymore after that. The car is running strong and the oil/coolant is not milky. Any ideas?
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Old Jul 11, 2007 | 08:58 PM
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Default Re: Mysteriously losing coolant (Khmi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Khmi &raquo;</TD></TR><TR><TD CLASS="quote">I have a been losing coolant at a pretty steady rate for the past month or so, about 1/4 cup of coolant out of the reservoir for every 100 miles of driving. I cant find any place that its leaking from. I did a did a radiator pressure test, and it lost about 1 psi of pressure in about 15 min but never dropped anymore after that. The car is running strong and the oil/coolant is not milky. Any ideas?</TD></TR></TABLE>

Sounds like the car is either burning it or you have a small leak somewhere. When you say you did a pressure test, did you only test the radiator or the whole coolant system?

I had a small coolant leak and couldn't figure it out either. Turns out the my clutch cable bracket rubbed the hose just a tiny bit and it was dripping out. I couldn't see it at all, but it dripped really slow.
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Old Jul 11, 2007 | 09:13 PM
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Default Re: Mysteriously losing coolant (Tippyman)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">

Sounds like the car is either burning it or you have a small leak somewhere. When you say you did a pressure test, did you only test the radiator or the whole coolant system?
</TD></TR></TABLE>

My friend did it for me. He took off the cap and attached it to the neck where the cap was, and pumped it up to pressure it.
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Old Jul 11, 2007 | 09:20 PM
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Default Re: Mysteriously losing coolant (Khmi)

Well, when the car is cold, the thermostat is closed, so maybe the leak is behind the thermostat?
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Old Jul 11, 2007 | 09:34 PM
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Default Re: Mysteriously losing coolant (Tippyman)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">Well, when the car is cold, the thermostat is closed, so maybe the leak is behind the thermostat?</TD></TR></TABLE>

maybe, but i left the car idling for 20 minutes still don't see a leak, but might be very small i got to feel around a bit more.
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Old Jul 11, 2007 | 10:01 PM
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Default Re: Mysteriously losing coolant (Khmi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Khmi &raquo;</TD></TR><TR><TD CLASS="quote">

maybe, but i left the car idling for 20 minutes still don't see a leak, but might be very small i got to feel around a bit more. </TD></TR></TABLE>

Leaks are much more prominent when the engine is under load, BTW.
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Old Jul 12, 2007 | 10:22 AM
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Default

when i first got my rex, it was leaking out alot but when we looked under the hood we didnt see anything but wetness. when i started the car and waited and then got frustrated i turned it off and thats when it would leak out a little bit of a couple broken hoses.
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Old Jul 12, 2007 | 10:29 AM
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Default Re: Mysteriously losing coolant (Tippyman)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">

Sounds like the car is either burning it or you have a small leak somewhere. When you say you did a pressure test, did you only test the radiator or the whole coolant system?

I had a small coolant leak and couldn't figure it out either. Turns out the my clutch cable bracket rubbed the hose just a tiny bit and it was dripping out. I couldn't see it at all, but it dripped really slow.</TD></TR></TABLE>

that was you with the leaky clutch cable? lol
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