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If the plate is that bent then it is possible that it may have fractured (or be about to) around the bolt holes, if the rest of the car is good then yes pull the engine or transmission and fit a new plate. Also how does it sound when cranked? Does the starter jam or sound like it is fouling the ring gear? I am still having trouble getting my head around the vibration though?
regards
Dave
The crank pulley moving in and out is more likely a harmonic balancer? This is bonded to the crank pulley, the bonding fails and the balancer moves out of sync with the pulley. . This is responsible for dampening engine vibrations. change the pulley and this may cure all the problems, a small distortion in the flex plate is unlikely to cause the vibrations you mention.
As a respectful side note, it is better if you supply all the information in your earlier post it would help with diagnosis.
regards
Dave
And you better change the dampener asap before you have to replace the whole crank. I would drive it till then.
The pulley has a shear pin key way and grove in the crank , left to long (which you have already ) you chance the key way in the crank getting elongated and the only fix is a replacement crank (major job ). If it has a new looking dampener already he has bojanged it already id say . If it was mine i would pull the pulley inspect the key way and replace the dampener if you can see that the rubber is separating. hope it works in your favour. Oh and you will need a big pipe for a snipe to get it loose .
A bent flex plate will not cause your HB to wobble. Did you replace it with a NEW HB or a used HB? if used, was it a confirmed good one?
And is it torqued down correctly? These need a-ton of torque...
You say it's on right, but do you know that or were you told that? You need a 3/4 inch torque wrench capable of over 300 ft/lbs and a 3/4 inch 30 mm socket to properly torque these down, it is just not going to come out right without the right tools.
I'd still say the harmonic balancer is suspect, and either on loose or became damaged during the install. Can't see any other reason for seeing what you're seeing.
Hope this helps.
Thrust washer on the crank is the only thing left if the hb is good. Pretty much the only thing that can happen is the pump in the transmission gets punched.