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Old 10-25-2010, 10:41 AM
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Coolant reservoir emptying

Brief bit of history...my water pump took a dump right before summer. I went ahead and replaced the radiator at that time since it had a small leak in it as well. It didn't get driven much during the summertime so when I was changing the oil the other day I noticed the antifreeze reservoir was empty. Thought it was strange but refilled it to the line with antifreeze and went on my happy way. Checked it today and it's empty again!

There are no puddles on my driveway, it's not running hot...any ideas where the fluid is going and what would cause this?

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Old 10-25-2010, 01:38 PM   #2
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Mine has the same problem. Mine isn't emptying that fast though. I think it is most likely a bad gasket that is letting the anti-freeze mix in with the oil and then it burns off. You should be able to smell it if you are burning anti-freeze. Its a pretty distinct smell.

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Old 10-25-2010, 08:20 PM   #3
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It's either burning it or leaking it. Pick one or the other then search until you find the problem or eliminate it as the problem. Then go from there.
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Old 10-25-2010, 08:23 PM   #4
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Mine does the same too after replacing the water pump and radiator. I have a very small leak at the radiator drain plug and no matter how I turn it it still leaks. I am going to try plugging it with something. Maybe worth checking on yours though.
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Old 10-25-2010, 08:31 PM   #5
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Quote:
Originally Posted by lpadd View Post
Brief bit of history...my water pump took a dump right before summer. I went ahead and replaced the radiator at that time since it had a small leak in it as well. It didn't get driven much during the summertime so when I was changing the oil the other day I noticed the antifreeze reservoir was empty. Thought it was strange but refilled it to the line with antifreeze and went on my happy way. Checked it today and it's empty again!

There are no puddles on my driveway, it's not running hot...any ideas where the fluid is going and what would cause this?
Is there a white stain on the underside of your hood on the side of the reservoir? There was on my 05 and it ended up being a small hole in the reservoir spraying coolant at the power steering pulley and onto the hood.
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Old 10-25-2010, 09:18 PM   #6
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If you replaced your radiator with a OEM radiator that could be a problem. Stock rads are made with plastic tanks that are just crimped on, a notorious place for leaking. Switch to an all metal rad (about $200 @ radiator barn) that solved my problem. Also check your oil, if it's milky looking then it's most likely your head gasket which is a source for loss of rad fluid
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Old 01-27-2014, 05:33 PM   #7
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My 1998 is doing the same thing. I'm pretty mechanical and I have search the obvious.
I have replaced the Radiator with an all aluminum, and a new radiator cap.
Oil level is steady and clean.
yet, the radiator is always low and reservoir is always low after a long drive.
I'm thinking there must be a small hole or split in the reservoir that spews coolant when under pressure.
Trouble is, I cant find an OEM replacement, (I don't want used !!!)
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Old 01-27-2014, 05:38 PM   #8
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I know this is an old post, but I'll try anyway.

I replaced my radiator, (after tank froze and split), with an all aluminum.
I am having the same issue. I'm pretty mechanical and have checked all the obvious:
leaks, oil, (oil is clean, constant level), etc., yet the radiator and coolant reservoir is always low after a long drive. I'm thinking it may be a small hole or split in the reservoir that spews when under pressure.
Trouble is, I can't find an OEM reservoir, (and I DON'T want used!!).

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