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Old 04-10-2012, 10:12 PM
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Engine coolant goes missing?

Hey guys,

A few weeks ago, I went to check all the fluids in my car and i noticed the coolant was low. So I bought some coolant (50/50) and poured it in. Then I just checked it today and noticed it was almost half empty again. So filled the reservoir and radiator. Why is this happening? Is this due to a bad head? The car s exhaust does not splurge out white exhaust or anything either. There is absolutely no leak that I can see coming from the car.
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Old 04-10-2012, 10:42 PM
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Quote:
Originally Posted by 79bird
Hey guys,

A few weeks ago, I went to check all the fluids in my car and i noticed the coolant was low. So I bought some coolant (50/50) and poured it in. Then I just checked it today and noticed it was almost half empty again. So filled the reservoir and radiator. Why is this happening? Is this due to a bad head? The car s exhaust does not splurge out white exhaust or anything either. There is absolutely no leak that I can see coming from the car.
If the head gasket is leaking coolant into a cylinder, that cylinder's plug will look quite different from the others. Pull the plugs and take a look.

If the radiator has a pinhole leak you can lose coolant over time and never see a leak on the ground. Does the oil look normal- not cloudy or frothy?

Did you recently drain and refill the cooling system?
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Old 04-10-2012, 11:11 PM
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Originally Posted by cobalt327
If the head gasket is leaking coolant into a cylinder, that cylinder's plug will look quite different from the others. Pull the plugs and take a look.

If the radiator has a pinhole leak you can lose coolant over time and never see a leak on the ground. Does the oil look normal- not cloudy or frothy?

Did you recently drain and refill the cooling system?
No I Have not, Ive only added coolant fluid to it
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Old 04-10-2012, 11:23 PM
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I'd suggest throwing a sheet of cardboard under it over night to see if it's an external leak. It will also give an general idea of where the leak is coming from.

It's quite common for coolant to leak from the weep hole on the water pump ... a sign that the impeller shaft seal and/or bearing may be on their way out.

Any antifreeze smell on the interior of the vehicle, or mist on the windshield above the defroster ducts on the dash? Small puddle of antifreeze on the carpet or drips hanging from the ductwork? Those are signs of a deteriorating heater core.

It may even be as simple as a bad radiator cap. Does the car have a recovery tank or coolant reservoir on it?
Edit: re-read and discovered that you do. Check the reservoir itself as well.

Get the cap and cooling system pressure checked. That leak will show up under pressure.

Good luck.
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Old 04-10-2012, 11:27 PM
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Quote:
Originally Posted by 66GMC
I'd suggest throwing a sheet of cardboard under it over night to see if it's an external leak. It will also give an general idea of where the leak is coming from.

It's quite common for coolant to leak from the weep hole on the water pump ... a sign that the impeller shaft seal and/or bearing may be on their way out.

Any antifreeze smell on the interior of the vehicle, or mist on the windshield above the defroster ducts on the dash? Small puddle of antifreeze on the carpet or drips hanging from the ductwork? Those are signs of a deteriorating heater core.

It may even be as simple as a bad radiator cap. Does the car have a recovery tank or coolant reservoir on it?
Edit: re-read and discovered that you do. Check the reservoir itself as well.

Get the cap and cooling system pressure checked. That leak will show up under pressure.

Good luck.
Thanks, well what happened was the coolant resevoir was empty from the day i bought the car until today. Could this be the problem?
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