cracked flexplate

VegasJen

Formerly Known as Clutchdust
Joined
Mar 3, 2014
Messages
198
Location
In transition
Finally got the motor pulled out of the suburban today and was surprised to discover this:
3184544d82ad8a403.jpg
What caused this? This is just a "going down the road" motor. No hotrod. I don't even flog it. I've towed a couple of times but beyond that it's pretty much bone stock and I drive it like I'm trying to get more than 10mpg.
 
Decades ago I picked up a Pontiac Bonneville because of an incorrect diagnosis by TWO certified mechanics the flex plate had sheered, engine ran but the silly plate was still.....they thought it was a bad crankshaft.....

picked it up and fixed it for less than a grand.....just after my second divorce.....:bump::rofl::rofl:
 
I got the crank out the other day and it wasn't as chewed up as I initially thought. In fact, it has hardly any damage at all. I'll probably go ahead and have it turned since it's out anyway.
But I guess the question is still, why did the flexplate crack? And would a cracked flexplate sound like a rod going bad?
I'd really like some experienced answers here because I would hate to put this thing back together and be looking to do this all over again another year or two later.
 
A cracked flexplate can make a hell of a racket. I heard a few back in my wrench turning days. Don't know why they crack though. Usually no signs of abuse.
 
A cracked flexplate can make a hell of a racket. I heard a few back in my wrench turning days. Don't know why they crack though. Usually no signs of abuse.

I agree, my experience was a '76? Bonneville 2 dr but owned by a woman....not likely a hotrod but yet that broken completely loose flexplate....

towed to my house....made money on the car....


they sometime break, and I have never heard of any reasons why, as to a specific, logical reason.....

:surrender:
 
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