Question about 2000 Chevrolet Blazer

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Adding too much coolant

I have a 2000 chevy blazer, was low on coolant so i filled the radiator and reservoir. one week later and it needed about a gallon more. i do not see any on the ground or on the engine.where could it be going, and what needs to be done?

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You may also check your heater core. That was happening to me and it was leaking which you wont see it on the ground if it is that. Can you smell any odors coming through your vents? if so im almost positive it would be your heater core.

Posted on Feb 22, 2009

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It sounds like a blown head gasket and the coolant is being ran through the engine.

Check the oil for signs of coolant(Thick grey oil or green fluid =Blown head gasket)But it can be blown and not be in the oil as well.

Posted on Feb 22, 2009

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  • The other will be a hose that clamps on to the radiator right below the cap on a little spout coming off the fill neck of the radiator. This hose is the actual path the antifreeze takes when the radiator is low pressure pulls the antifreeze out of the reservoir to use.

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Just bought my 2008 Chevy Impala and I love it except when I use the remote start or just start normal, it does not heat up unless I am driving down the road. It blows cold air until i drive. Is this...


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I hate to tell you this but its possible...

You have a leak. Look around on the driveway and try to determine if you have an external leak as opposed to an internal leak. If you see no coolant on the ground, suspect a blown head gasket. Do not continue to drive this car in this condition. If it does indeed have a blown head gasket, serious engine damage will occur.

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Your description may actually be your answer, so to speak. You mention 'generally as engine is cooling or if coolant is added too quickly'. It sounds to me like the reservoir is over-filled.
When the engine is cooling, coolant tends to flow back to the reservoir (plastic 'jug' where you add coolant). A bad radiator cap or one that was replaced with too low a PSI rating can easily allow too much to fill the reservoir and and occasionally overflow it. Most reservoirs use a rubber tube to drain excess coolant so it may appear to 'leak' near the front left wheel or left side of engine.
Replace your radiator cap. (did they pressure test the cap too?)
Make sure you check your owner's manual for the proper PSI. My sources show 15-16psi, but that sounds a little high to me. Also, make sure you have the correct (50/50) anti-freeze/water mixture.
After you replace the cap, make sure the reservoir has the right amount of coolant and isn't over-filled. (To 'fill cold' line) Drive the engine until hot, then park the truck and see if the problem is fixed. Good Luck!

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