We blew up the engine in our Cadillac CT5-V Blackwing during initial testing:
After about 15 standing-start launches, the LT4 V-8 started misfiring severely.2022 Cadillac CT5-V Blackwing for a 40,000-mile long-term test
quickly turned to despair after its 668-hp supercharged V-8 suffered a catastrophic engine failure during our initial test session. After respecting the 1500-mile break-in period—keeping the revs below 4000 rpm and not sitting at a constant speed for extended periods—we hit the test track with just over 1800 miles on the odometer to log its initial performance figures.
Bad fuel could have caused this kind of pre-ignition or knocking, but then both banks would have been affected. So small-block assistant chief engineer Mike Kociba thinks it was likely one of two things that happened: Either the fuel supply on that side of the rail was somehow depleted—a contaminant restricting the flow somewhere—or a similar blockage in the cooling system that allowed things to get too hot. But, during the teardown, they didn’t find such a blockage in either system.
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