Hi,
As far as their diagnostics are concerned, one would think if they knew the head gasket was bad, they would have mentioned it.
Please keep in mind, a bad head gasket doesn't mean the engine is bad. It too can be replaced. However, based on what they quoted you for the thermostat housing, you may want to consider having someone other do the work.
Let me know. If you want to try it yourself, I can help, so let me know.
Take care and let me know what you decide.
Joe
Friday, July 8th, 2022 AT 7:00 PM