i have an 06 nissan sentra 1.8l base model, 55k miles
im hearing a gurgling sound when the heat is on. what could that be? also the heat only comes out of defrost vent. not sure if that contributes to the noise. is this a cause for concern? thanks for the help scotty.
Well, gurgling normally means you have air in the system so I would bleed the air out of the cooling system first
ok thanks for the help scotty