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P0128 Replace Coolant?

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Old Dec 10, 2019 | 02:44 PM
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P0128 Replace Coolant?
I got the CEL and had it scanned and got P0128 - thermostat. I bought the part from FCP EURO. I am trying to decide whether to replace the coolant now or top off. I have about 140k miles on the car and have not ever replace all the coolant. I did have a radiator hose leak a while ago, but only topped off the fluid.

So, should I go ahead and replace all the coolant?

Thanks.
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Old Dec 11, 2019 | 02:41 PM
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When was it last flushed?
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Old Dec 11, 2019 | 02:50 PM
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Originally Posted by C280 Sport
When was it last flushed?
It has never been completely flushed.
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Old Dec 11, 2019 | 03:47 PM
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Originally Posted by labguy
It has never been completely flushed.
Wow... Then you are way way over due then. This should be done before the 100k mile mark...
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Old Dec 12, 2019 | 11:27 AM
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Originally Posted by C280 Sport
Wow... Then you are way way over due then. This should be done before the 100k mile mark...
Thanks. I will have it done. BTW, according to my manual it is due at 143k miles or 15 years.
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Old Dec 12, 2019 | 11:29 AM
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Would you let anything go 143k miles or 15 years on your car? A jug of MB coolant costs 20 to 30 dollars and a gallon of distilled water costs 1 dollar. The radiator drain is under the car on the front passenger side.
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Old Dec 12, 2019 | 03:25 PM
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Originally Posted by bkdc
Would you let anything go 143k miles or 15 years on your car? A jug of MB coolant costs 20 to 30 dollars and a gallon of distilled water costs 1 dollar. The radiator drain is under the car on the front passenger side.
This forum has, for the most part, recommended that we follow the maintenance schedule provided by the manufacturer.
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Old Dec 13, 2019 | 09:31 AM
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Have to remember it is not just the miles but age as well. That is a long time IMHO. I usually do mine every 5 years or so. Milage depending. The whole sealed for life stuff does not fly with me. But thats me. I will have to look in my manual 140k miles or 15 years just seems crazy to me.
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