GR Yaris Why the GR Yaris Engine Has Started to Break | Mike Fernie & Whifbitz

Interesting video but very much a clickbait title, considering they even stated that they're usually rock solid as well. Wonder where it was that tuned it though?
 
Speculating that it’s probably a dodgy tune from a rival tuner but unable to substantiate or quantify 😂. Interesting deep delve into the engine innards though even if it was very much a clickbait title.
 
A lot of speculation going on there.
Piston ring gaps again? So, a company like Toyota have got this wrong, FFS.
What about the valve head, not a mention or did I miss it.
 
Mines not far off as bad as that (and not toyotas fault!) When I'm allowed to, all will be revealed in time.