What is this part that came out with my coolant funnel?
Hi all! 2008 Honda Accord 170k mines. So I flushed my radiator and cooling system and the antifreeze looked like water and oil creating lines on top. I suspect that this is a leaking head gasket. I decided to put bars head gasket sealant and new antifreeze. I found this after I removed the spill proof radiator funnel. Does anyone know what this is?
It looks like a broken thermostat to me
Thanks Scotty! Would this still be concerning because I plan on making this a beater? My temperature gauge did not go over middle operating temperature after finding the piece in the funnel and drove locally for 20 minutes to test it.