New engine, seized 2 seconds after first start

[NismoSTune]

New engine, seized 2 seconds after first start

Brand new engine failed and stalled within 2 seconds. Would not restart. Mechanic found the engine wouldn't turn by hand/wrench. Found the exhaust camshaft is seized. number 1 cap nearest the cam gear is wrecked.Couple bent valves and a shredded timing belt (from the skipping).

I suspect a few things like the cap was replaced or misplaced, torque sequence, or timing belt tension too high but I'm not the mechanic. Any thoughts? Specs don't matter but this is a big build. Engine is all new.

[KiwiRS4T]

Sounds like you got off lightly. No damage to pistons? The big question: who assembled it?

[89CAL]

It sounds like it was never turned over by hand at various stages of the build.....

[Ben C34]

I would be surprised if timing belt tension could do it.

 

Wrong cap, or no lube would do it.