SOLVED - Flexplate or Starter?

[Tonyrodz]

Right foot or bad luck.

explain how the gas pedal is going to cause the flex plate to crack

Both of my Express van flexplates cracked. 01 and 05.

 

[Doubeleive]

Both of my Express van flexplates cracked. 01 and 05.View attachment 263924 View attachment 263925

but what caused that? faulty casting? if anyone was going to break a flex plate from a heavy foot that would be me and I never had that problem ever, broke pretty much everything else though

 

[Tonyrodz]

but what caused that? faulty casting? if anyone was going to break a flex plate from a heavy foot that would be me and I never had that problem ever, broke pretty much everything else though

I was told because I floor it all the time. I pull alot of weight--maybe that's why ??

 

[OR VietVet]

But, you are sitting still when you crank the engine and then after the engine starts the flexplate just spins and spins and spins and spins.......that cracks me up.

I have seen the flexplate crack because of age-best I could guess, poor quality part, accidently turning the key when the engine is already running and mis-torgued flex plate attaching bolts and in an extreme instance, too much end play/wobble at the crank or torque converter and even a loose starter mount. I have also scratched my head and just said, "I got no ******* idea why it cracked".

 

[Doubeleive]

But, you are sitting still when you crank the engine and then after the engine starts the flexplate just spins and spins and spins and spins.......that cracks me up.

I have seen the flexplate crack because of age-best I could guess, poor quality part, accidently turning the key when the engine is already running and mis-torgued flex plate attaching bolts and in an extreme instance, too much end play/wobble at the crank or torque converter and even a loose starter mount. I have also scratched my head and just said, "I got no ******* idea why it cracked".

that makes more sense

 

[OR VietVet]

I forgot one that I saw once. An engine was partially in a hydraulic set up from head gasket leakage into a cylinder and while cranking it would hesitate on the compression stroke and after a couple times of that the flexplate cracked.

 

[exp500]

Right foot easier to say than Thrust bearing wear in engine and crank walking- Tony's pics show that well.
It is only a piece of 1/8 inch steel, I'm surprised it doesn't happen more.