Hi,
If you feel there is a cooling system leak, that is somewhat easy to check. If you look through this link, it explains how in general to repair a coolant leak:
https://www.2carpros.com/articles/car-is-leaking-coolant
If that doesn't help, then I recommend pressure testing the system. You will need a pressure tester, but most parts stores will lend one to you. Here is a link that explains the procedure for pressure testing a cooling system:
https://www.2carpros.com/articles/radiator-pressure-test
I am a bit worried as to why the cooling system was overfilled. Is there something the seller is trying to hide or is there an engine problem such as a head gasket? If you want, take a look through this link. It explains the most common symptoms related to a failed cylinder head gasket. It explains what to look for.
https://www.2carpros.com/articles/head-gasket-blown-test
As far as making the purchase, that is really hard for me to determine without being there. I always tell people, "Buyer Beware." If something is off, it's usually for a reason.
Take care and please feel free to let me know if you have other questions.
Take care,
Joe
SPONSORED LINKS
Friday, July 16th, 2021 AT 9:52 PM