
If I unplug the EGR Cooler connector and still experience coolant loss and cylinder misfiring over the next few days, does it almost mean my car will need a head gasket replacement or replacement engine?
Hi everyone, I just recently learned that for our CT200h (or 3rd gen Prius), the reasons we experience coolant losses and the engine shudder (cylinder misfiring) is through coolant seeping into the cylinder heads. I used to think my '12 CT200h can hit 400,000 miles before it experiences these potentially catastrophic failure but I guess I'm at the juncture lol.
It sounds like there are three main pathways: 1) blown head gasket, 2) blown EGR cooler (coolant enters intake manifold), and 3) maybe heat exchanger / exhaust manifold (mainly for 4th gen Priuses).
I'm awaiting for a mechanic my friend had recommended to come back from vacation but was wondering whether it is looking like a blown head gasket for my vehicle.
No one here in Ontario, Canada, be it on a Canadian discussion forum or reddit, seems to be able to refer me to a shop that can do 4th gen engine swaps so I may have to go with a 3rd gen engine swap or have the head gasket replaced though from what I have been seeing, these head gasket replacements are not foolproof and could blow again in less than 50,000 miles of traveling and I drive a lot to work and back. Also, do head gasket replacements really take anywhere between 10 to 20 hours of labor work? I will go with Fel Pro as that seems to be praised by the Prius/CT200h community/owners.
What are your thoughts? The Engine Coolant Temperature has been quite stable when I had not unplugged the EGR cooler and ranged between 88 to 93C or 190 to 200F.
Has anyone used California-based Thermaweld for hybrids? It seems all stop leak are temporary band-aid solutions haha:
https://thermalweld.com/product/thermalweld/
Many thanks!