Question about 1998 Chevrolet Blazer

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Making a "bubbling noise" when in park and

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Air in your cooling system, inspect your coolant level and fill to the top with 50/50 mix of Dexcool antifreeze (Orange antifreeze) and water. This would be a good time to flush out your system and replace it with new DexCool antifreeze if it's been in there for more then 5 years.

Left in there over 5 years can cause the coolant to leave crystallized deposit like rust which can cause issue like over heating and gasket failure to the intake manifold. Before draining the old coolant out, add some radiator flush to clean out the. Just follow the instructions on the bottle.

Best also would be to replace the thermostat (195' degrees) and you should have another 5years of trouble free cooling system.

But the first you need to do is top off your coolant to ensure that there is no air in the system. The air will cause a coolant leak which will cause you more money and time.

Thank you for using Fixya and have a safe New Years.

Posted on Dec 29, 2010

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