Middling engine performance, overheating, and coolant loss would typically go hand-in-hand when dealing with a blown head gasket, but it all depends on the point of failure on the seal.

Mazda Miata vs. Toyota GR86 GR86 Owners Turning to Shops to Save Their Engines Toyota Covers Warranty Repair on Blown GR86 Engine The footage in question was initially uploaded by YouTube user LUNK.