2011 Toyota Yaris Head Gasket Issue

[mosschief]

Hi all,

Was looking for a little input on head gasket issues with a 2011 Yaris. I have been having issues with mysteriously disappearing coolant and I performed a combustion leak test using this kit that came back positive, indicating combustion gases in the coolant engine.

It seems the head gasket likely has issues

I would like to try performing the repair myself(at least accessing the head and replacing the gasket, I will likely also have the head resurfaced by a machine shop). I'm pretty handy with cars but it would be the largest repair I've done myself. This seems to be a fairly uncommon issue based on my search, but I was wondering if anyone had any recommendations for quality head gasket kits or instructional resources beyond the service manuals.

I know that swapping the engine is also another option, but this engine only has 55k miles so seems like it might be worth fixing.

Also was wondering approximately how difficult this is to perform on the Yaris compared to other cars.

Thanks a lot!