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How much coolant loss vs time driven is normal?

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Old 11-19-2012, 07:00 PM
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How much coolant loss vs time driven is normal?

Title says it all (Not talking about hours, but months/years, Miles/hours ran).

I'm probably just being paranoid but, How often do you need to add coolant to a car with only evaporation being the loss? It seems every 4 months or so my coolant is a little low, not low enough to turn the light on, but lower than I set it at. No leaks, no smells in the engine bay, no white smoke.
Old 11-19-2012, 07:14 PM
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Basically very little...maybe 1 cup every 6 months....there is no reason in a sealed system for it to go anywhere

If you are loosing much more than that...check the weep hole on the water pump..that is a very common leak when it gets on in miles
Old 11-19-2012, 07:26 PM
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Zero loss is normal which is the # for my 07 at 5.5 years and 32, 000 miles.

Dannobre's # is upper normal amount which could happen by bad cap even or worst case internal seep.

My 07 would smell of antifreeze when new, but it's full and I never added any.

I guess some hose fittings hardened up to seal better.
Old 11-19-2012, 08:54 PM
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About 4oz every 4 months. Running a 70%water/30%coolant mix. All Coolant hoses are new. Temp rarely goes over 210*f, most of the time it's between 181-195*f. Just seems odd.
Old 11-19-2012, 09:01 PM
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It could be a lot of things....it's within what I would call OK...and wouldn't worry too much at that level

You could try and pressure test it...it might let you see where it's leaking from....or use an UV die

Likely a hose connection or the water pump
Old 11-19-2012, 11:07 PM
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its kind of normal. in addition to looking at the water pump, i would poke your head under the bumper and look at the radiator. my old car didn't leak, but it did show some signs of seepage
Old 11-20-2012, 05:21 AM
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Aren't our water pumps changed when the engine is replaced by Mazda?
If so, this water pump only has about 60k on it. Engine was last replaced in 08 @ 47k miles, have 109k on the obo.

I'll check out the water pump this weekend, she gotta go back to the shop today for more rear end work.
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