Limey wrote: ↑Sun Jun 26, 2022 9:51 am
I just checked my lower radiator hose the one that connects to the thermostat at cold temperatures. When I gently squeeze it I hear the usual radiator neck water gushing noise but I also hear a ticking like metal type noise from I think the engine side where the thermostat is. A faint light ticking clicking when I squeeze that hose.
Is that the noise from the coolant pushing at the thermostat ?
It might just be the jiggler in the "burp hole" that you're hearing, but it isn't normal for a 'stat to make audible noise. I doubt it's a broken spring, that will generally make the 'stat unable to close and will cause long warmups and not overheating. In any case, maybe something metal is broken off and kicking around in there. I think I'd take a look, and just replace the 'stat while you're in there anyway.