I've cracked another flywheel, my second. the first one I replaced took a long time without a lift. now, the new flywheel is cracked again.

If anyone knows the cause, please help.

If anyone knows where I can get a used or donated flywheel, please let me know.

Thanks very much!

 

is it the stock flywheel? i have no idea why but you got any pics of this?

 

are you over reving the engine?

 

how do you know it is cracked? have you already took the transmission out? and...how long has been since you replaced it with the newer one? was the replacement used?

 

I replaced the flywheel (flexplate). It was cracked around the bolt holes and would have cracked all the way had I not replaced it. This [cracked] one, which I purchased from Mazda, lasted about 10,000 miles.
I purchased the car with a bad engine, one that had seized through lack of oil. I replaced the engine with a rebuilt engine from a company in Washington/Oregon - can't remember the name.
After running for some weeks I noticed that the car shuddered under power. Subsequently, I saw the flywheel had cracked.
My feeling is either the engine I put in has a warped crank or the transmission is bad.
The flywheel, all engine mounts, everything . . . are installed correctly.
If I am on the highway at 70mph and shuddering, if I shift into neutral, the shuddering dies down.
I'm about to give up and sell it.
If you have any suggestions, please offer - I'll give it one last try.

 

Oh! I'm sorry. I forgot to mention - I am not over-revving the engine and the latest flywheel I just put in is used (but the last one was new).

 

Did you torque the flywheel to the correct specs?

 

are you using the right year flywheel and counter weights for the year of engine?

 

When the flex plate was installed were the bolts put in at factory torque ?

James

 

And I just saw that was already mentioned....DOH

Ok, did you torque it down in a star patern?

James

 

Do you have a manual, or an atomatic if you have a manual I have an S4 flywheel (stock) that I will sell you, no broekn teeth came off of a running car that I stoll the motor from.

 

he said flexplate...that'd be for a a/t.

 

Yes, but the word flywheel keeps tripping me up.

 

You may have just got 2 bad flywheels in a row. That kinda stuff does happen. 3rd time is a charm.