The Toyota turbocharged 1.6-liter three-cylinder (known internally as the G16E-GTS) is a little wonder. In the latest version, it makes 300 horsepower and 295 pound-feet of torque. Those figures would be impressive enough for a force-fed four-cylinder but are even more extraordinary in a powerplant with just three pistons reciprocating up and down.No engine is perfect, though, and the G16E-GTS in this teardown video shows some failure points. If you're driving a stock GR Corolla with this engine, then you likely have nothing to worry about. However, if you can't resist tinkering for extra power, then this video provides some useful insights. Plus, there's a great look at how Toyota designed this mill by seeing one with a massive hole in the block. Breaking Things Down Mike Fernie / YouTubeThis G16 engine is at Garage Whifbitz in Wales, which specializes in Toyota tuning. The history of this specific mill is a mystery, though it's believed to have been given an aggressive tune. Regardless of how the damage happened, this one suffered a massive failure that caused a connecting rod to slice through each side of the block.Before digging into what went wrong, the video shows off a little of what makes the G16E-GTS so special. For example, there are hollow camshafts with pressed lobes to save weight. There are also sodium-filled valves and intake ports that are CNC-machined to match the manifold for a better fit between the elements.According to the video, the stock piston ring gap is slightly too large, allowing oil to enter the combustion chamber from the crankcase. There are also some reports of inconsistencies in the piston casting. Depending on the severity of the issue, this can result in damage to the pistons, connecting rods, and crankshaft.Louis, the shop's chief tech, reports that problems are rare in stock engines, but when they fail, the issue is often catastrophic – as in this case. He thinks this engine had a revised tuning map, possibly specifically for racing gas. If the owner only had access to premium pump gas, there could have been severe enough knocking for this destruction to occur.There's also evidence of the head gasket lifting away from the block, which is something that's far more common on tuned engines, according to Louis.The failure caused the piston to disintegrate into hundreds of metal chunks. The connecting rod was then able to flail around, causing the holes in the block. A lot of the pieces ended up in the crankcase; removing the oil pan cover reveals the carnage.According to Louis, his experience with tuning these engines is that they can support around 380 hp on the stock internals. Also, if you're planning on track driving, get a baffled sump because the stock system can cause oil starvation. The Future ToyotaThe G16 1.6-liter three-cylinder is about to get a bigger sibling in the form of the G20 2.0-liter four-cylinder. No official specs are available yet, but the output is reportedly over 400 hp. The powerplant, along with hybrid assistance, would allegedly be available in the upcoming Celica, which we expect to premiere before the end of the year. There are also rumors of the G20 showing up in the rumored MR2 revival.Source: Mike Fernie via YouTube