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Thermostat?
Tech stream with virgin key
Sounds like the dreaded engine rattle
Got an extra for sale 100 bucks
Chey12v battery
Should be fine since you mixed it with water, just doesn't last as long
Holes inside cooler where exhaust flows through,checked the intake manifold and was clean
Check your 12v battery
Done
I have a 2012 prius c , previously owned a 2010 prius gen 3
2012 prius c has bigger holes so doesn't clog as easy
Egr valve and cooler was dirty but not clogged at 190k miles
I would get another lower mileage engine
Oil catch can also
Proper cleaning takes at least 3hrs.When knocking occurs add some acceleration to rid noise faster.
Yes cleaned the intake and ports as for speed 80's on highway
I've cleaned my egr twice and had an occ but at 240k miles still needed a headgasket
Add more wiring
Parasitic drain
I see a big bill coming with those miles