Should thermostat be changed if over 5 years old? 4.0 Northstar engine.
Nov 15, 2011 at 2:34 PM
How to flush and fill cooling system?
1999 OLDSMOBILE AURORA
1013JESS
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Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
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Hello,
It is not required to replace the thermostat for this.
But it can be changed while flushing the cooling system so you will know that the component is new.
This vehicle uses 13 quarts of coolant.
Here is a helpful video on coolant drain and flush:
https://youtu.be/j8_MD76LbiQ
https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars
I have attached diagrams and instructions for your reference.
Please let me know if you have any questions.
Thank you.
It is not required to replace the thermostat for this.
But it can be changed while flushing the cooling system so you will know that the component is new.
This vehicle uses 13 quarts of coolant.
Here is a helpful video on coolant drain and flush:
https://youtu.be/j8_MD76LbiQ
https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars
I have attached diagrams and instructions for your reference.
Please let me know if you have any questions.
Thank you.
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Jan 24, 2022 at 12:54 PM
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