Pine Hollow Diagnostics does a Prius v Head Gasket

Clear narration and video with a a few new insights. Part 1

Will a head gasket be enough?

 

Part 2

 

Is the oil filter the hardest part?

 

He is just one of those Mechanical Engineers that thinks he knows something because he works on cars for a living.

I think that car had a really advanced hg failure with coolant in the oil. Most likely the offbrand housing oring had swollen and seized.

I think thermal cycling has validity and was apparently reinforced by Toyota Europe's inclusion of long idles and stop and go as hg failure contributors. I have seen 40 and 50f swings within minutes in idle and low speed driving tests while using ac where the fans don't shut off. Of course Pine Hollow was quoting Gasketmasters from a few years ago; they have migrated to more engine changes along with head gaskets.

It would be good if PIne Hollow gives us a followup on his plain vanilla gen3 hg replacement down the road.