Gurgling noises in head, ear ringing - Try Out

My master bathroom has two sinks right next to each other, One of which makes a gurgling sound when I finish using it.
I have a sink that makes a lot of noise when draining and the sound comes from the overflow port on the sink.


Ok, the noise you are hearing, is the sound of coolant mixed with air from being low on coolant threw the heater core. If inspection reveals evidence of coolant witness marks (1), replace the entire cylinder head(s) assembly.

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