Hello Prius chat members, My wife and I own a 2013 Prius V. Which we purchase new and had 170K miles. At about 145K we had the missing when cold and a good local service shop diagnosed and repaired the cloged ERG. Now we have occasional ratteling on cold start up. On a couple of occations I've check the coolent and observed it a minimum. But it's very irregular. I did the test for CO2 gas in the coolant tank, but the indicator never changed from blue. In the last month I have lost two full coolant tanks with not a drop on the ground. Most mornings it does not rattle. Today I pulled off the wiper assy. Plastic covers and removed the coils and plugs. Using my new Velvor bore scope I've posted what I think is steam cleaning of a piston and cylinder head. Notice the area arround the exaust valves are clean of carbon. This is cyl No. 1. I'd like another voice before I tear this car abart further. My wife loves this car. As far as she is concerened she would drive it another 170K miles. No milky oil. I did get an over heat warning light for five seconds last week when the coolant ran low while driving. There are no other codes. Just the 117 from the temp sensor. Should I go forward with a Head Gasket Job? Thanks
You need to fix it quick. Overheating will warp the head making a gasket repair fail and too much coolant in the cylinders can bend rods or blow holes in the block. “Hey Walt…”
