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24 bent valves? So something went wrong with the timing to both heads.
Did you only replace the IMS bearing or did you replace the IMS as well?
Have you checked the intermediate shaft? Sometimes the gear package at the ends of the shaft get loose / twists. Some put screws in to ensure the IMS sprocket does not twist on the shaft (i would recommed that). That would explain the complete bad timing.
Did you check chains, chain tensioners and chain ramps? I would replace chain tensioners and chain ramps. Chains have to be checked.
Regards from Germany
Markus
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