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Dr.Dale
Novice
Apr 12, 2010, 6:29 PM
Post #1 of 10
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I put a flywheel in a 2003 chevy express van 4 mos. ago because the center arround the crank was cracked......I happened again .I checked for t.s.b.'s and found nothing.The trans.and 6.0L engine are original with 123k .I haven't seen this since the 80's and I'm still not 100% sure why it cracked again so soon.The trans. looks to be mounted straight as far as i can tell.Could this be a problem with the torque converter ? Ballooning ? I'd like to pinpoint the cause before changing it again.Has anyone seen this recently? Thanx in advance , Dr. Dale 
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intimadatorsquizz
Novice
Apr 14, 2010, 8:30 AM
Post #2 of 10
(8624 views)
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Re: cracked flywheel
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Did you replace the spacer as well when you did the flexplate? Gm did have issues with these and part # 12563532 spacer is to be replaced with a new flexplate because of this reason of them cracking.
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Dr.Dale
Novice
Apr 14, 2010, 2:49 PM
Post #3 of 10
(8612 views)
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Re: cracked flywheel
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Thanx for that info intimadatorsquizz.....Was this from a tsb ? Thanx , Dale
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intimadatorsquizz
Novice
Apr 15, 2010, 4:36 AM
Post #4 of 10
(8606 views)
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Re: cracked flywheel
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it doesns't show a TSB # or anything, but when i worked at the dealer we had this problem quite often and we were told to use the spacer to fix the issue.
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Dr.Dale
Novice
Apr 20, 2010, 8:39 AM
Post #5 of 10
(8588 views)
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Re: cracked flywheel
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Hey intimadatorsquizz ! I totaly trust what you are saying....But I still have a hard time understanding what the spacer has to do with the repeated cracking of the flywheel ? Is it because the spacer was never installed from the factory?I'm not sure if it had one at this point ! is that possible ? or is the factory spacer defective in machine tolerance?........ In my 32 years as a general auto tech. I in almost all cases go with o.e. replacement parts as well as follow the recommended procedures for the repair i.e torque sequence,loctite etc.etc.......Thanx for any input , Dale
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intimadatorsquizz
Novice
Apr 20, 2010, 8:53 AM
Post #6 of 10
(8585 views)
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Re: cracked flywheel
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the spacer i believe reinforces where it bolts to the crankshaft. it's a pretty thick piece and like i said i used to sell these and for the people that didn't put it in would break the new flexplate after a short while.
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Dr.Dale
Novice
Apr 20, 2010, 10:52 AM
Post #7 of 10
(8581 views)
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Re: cracked flywheel
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O.K......Here is what i just found out.....the original flywheel pn12551367 has been changed to pn12621399 and includes the spacer pn12563532 and bolts pn12563533.....I hope its a done deal !
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intimadatorsquizz
Novice
Apr 20, 2010, 10:56 AM
Post #8 of 10
(8578 views)
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Re: cracked flywheel
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looks like GM got smart and made it in a kit.
Good luck hopefully it fixes your issue.
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Sidom
Veteran
/ Moderator
Apr 20, 2010, 7:24 PM
Post #9 of 10
(8566 views)
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Re: cracked flywheel
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Thats some good info. I haven't run across this problem yet but I'll file this away in case I do...... Thx 4 posting this
So what side of the counter were you on........ I'm guessing the parts side.....
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intimadatorsquizz
Novice
Apr 21, 2010, 4:45 AM
Post #10 of 10
(8558 views)
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Re: cracked flywheel
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Thats some good info. I haven't run across this problem yet but I'll file this away in case I do...... Thx 4 posting this So what side of the counter were you on........ I'm guessing the parts side..... I was a parts counter man at a Chevy Dealer for 21yrs. the last 11-12 yrs there i was the assistan parts manager. i got tired of there crap and cutting my hours and other things so i left to work for a better company.
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