Hi Got another engine 19000 mils on it one owner from new right off on it for my van but they think it may have bent valve as someone removed cam bet tensioner when it was in the yard and when they moved it they turnd the engine over by mistake Could that have damaged the bottom end ie big ends crank shaft pistons as I have another head a can put on. do you think I will be ok have done engines with bent vales before with no real problems but just want second opinion thanks’ bill