Thread: WTF Flexplate broke/damaged Updated

Page 1 of 3 123 LastLast
Results 1 to 20 of 43
  1. #1 WTF Flexplate broke/damaged Updated 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    So almost 2 months ago I took my fuel rails off to make a set for when I installed my intercooler. Long story short, I got sidetracked with house projects/new baby/family visiting. Last week family left and I started back on the car... Made custom fuel rails, installed AN fuel lines, Ported LIM installed, IC installed, bunch of custom brackets and stuff. I am still waiting on my trans coolers(had to remove the old bulky one for the FMHE) I have just about everything but them done so I decided to just start it up and run it for a few and check for leaks and all that good stuff. So I start it, had forgot to put the EGR blockoff plate on the LIM and it ran for just a few seconds but rather rough cause of the giant vac leak. So I fix that and start it again, idles perfect and smooth like she should and no leaks. I rev it a bit, nothing past 2k and I hear this horrible loud ticking but as it idles back down it goes away. I grab my stethoscope and rev it again and it gets louder and now will not go away. First I thought crank/rod but after a little looking around I think its coming from flexplate, pull inspection cover and it is LOUD. So I turn it around a few times with the screwdriver looking all over for cracks and I see none. Unbolt TC from flex and nothing changes, still no cracks. But with it running and TC unbolted I can see the flex wobbling like its bent... Here's a couple videos I took, and the one where I use the screwdriver is just so you can see the wobble a little better:

    Broken flexplate Grand Prix GTP - YouTube

    IMG 2507 - YouTube
    Last edited by Kejross; 11-30-2011 at 03:28 AM.
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  2. #2 Re: WTF Flexplate broke/damaged 
    GrandPrix Junkie machinegunsquid's Avatar
    Join Date
    Sep 2008
    Location
    Florida
    Posts
    3,759
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Flexplates break.

    They tend to develop a hairline fracture, that will, over time, lengthen. Eventually, that fracture will reach either the end of the flexplate (where the teeth are) or one of the balance holes, and then turn into a full blown crack.


    Mine did it one day, just driving down the road. Came to a stop, and all of a sudden that terrible racket started.

    Even after pulling the engine, and checking the flex over with a magnifier, I still couldnt find the crack. But replacing it with a new flexplate sure did fix it.


    Long story short. It's mechanical. Nothing mechanical will last forever, it will eventually break.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
    Reply With Quote  
     

  3. #3 Re: WTF Flexplate broke/damaged 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    You guys make me worry about mine now.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  4. #4 Re: WTF Flexplate broke/damaged 
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    39,927
    Thanks (Received)
    63
    Likes (Received)
    166
    Dislikes (Received)
    5
    if you think about it, the flex plate takes all the abuse, its what transfers all the power to the trans.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
    Reply With Quote  
     

  5. #5 Re: WTF Flexplate broke/damaged 
    GrandPrix Junkie machinegunsquid's Avatar
    Join Date
    Sep 2008
    Location
    Florida
    Posts
    3,759
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by scottydoggs View Post
    if you think about it, the flex plate takes all the abuse, its what transfers all the power to the trans.
    Sorta. It also takes a piss ton of abuse from years upon years of start-up.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
    Reply With Quote  
     

  6. #6 Re: WTF Flexplate broke/damaged 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I understand that mechanical things break but just seems like a really really odd time for it to make itself evident ya know? After sitting 2 months, then never going above 2k rpm just seems really really strange to me... I rotated it all around and pried it side to side and never saw anything as far as cracks. I'm either gonna demod and sell it off over the winter or just buy me an l26 and use my ported heads and cam on it cause I sure as **** ain't pulling a motor for a ****ing flexplate.
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  7. #7 Re: WTF Flexplate broke/damaged 
    I live here. brandonl2000's Avatar
    Join Date
    May 2010
    Location
    Grand Rapids, MI
    Posts
    6,705
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    my flexplate broke in the inspection line. had the ebrake on and she said try to move, and i did and then clack clack clack.

    it happens. just replace it.

    EDIT: and i was STOCK, bone stock.
    Last edited by brandonl2000; 11-15-2011 at 07:52 PM.
    2003 Grand Prix GTP-3.5 setup, sold it, miss it
    2002 Grand Prix GT-top swap, GT1 Cam, SD Headers, 90# springs, 42.5 injectors, 3.4 pulley - sold
    2012 Chevrolet Cruze LTZ-Summit White, 1.4Turbo
    Reply With Quote  
     

  8. #8 Re: WTF Flexplate broke/damaged 
    Your ClubGP Liason copgtp's Avatar
    Join Date
    Mar 2008
    Location
    Orange County, NY
    Posts
    1,101
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    You're pretty extensively modded dude...how could you be so horrified that your STOCK flex plate broke??? LMAO, you guys crack me up sometimes. You need to pay to play my friend, modify your car, stock **** is goin break. Either pony up and put a new one in, or get on the demod.
    Reply With Quote  
     

  9. #9 Re: WTF Flexplate broke/damaged 
    GrandPrix Junkie machinegunsquid's Avatar
    Join Date
    Sep 2008
    Location
    Florida
    Posts
    3,759
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Before people start getting their panties too far up their ass to get back out.

    cop is right, stock parts are gonna break, especially on modded cars.

    But, the exact same thing happened to me Kejross...and I took the opportunity to completely clean the engine bay and detail the motor while the engine was out. Yes, it's a total PITA to have to pull the motor for a few bolts. But it is really worth parting out something you love over something so little?

    And to be honest, pulling the motor doesn't take a real long time. I had mine out, cleaned, detailed, and back in (save for the wiring, and the belts) in a little over 12hours, and that was at night.

    So just take a deep breath, grab a 6pack (any more and you'll start misplacing parts) and just get to work.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
    Reply With Quote  
     

  10. #10 Re: WTF Flexplate broke/damaged 
    GTX Level Member OH4CompG's Avatar
    Join Date
    May 2009
    Location
    Portland Oregon
    Posts
    1,361
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    You could have the flex plate changed in a day. It's not that hard to pull the motor for that. I drove a 98 GTP in the garage and drove it out 8 hours later with a new torque converter. That includes several beer breaks, and a lunch break.
    Reply With Quote  
     

  11. #11 Re: WTF Flexplate broke/damaged 
    The Blue One blueguy's Avatar
    Join Date
    Jun 2008
    Location
    Dirtyzville, Missery
    Posts
    31,287
    Thanks (Received)
    1
    Likes (Received)
    2
    Dislikes (Received)
    0
    Anyone else in to tell the OP to get a Billet one...JUST BECAUSE.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
    Reply With Quote  
     

  12. #12 Re: WTF Flexplate broke/damaged 
    Your ClubGP Liason copgtp's Avatar
    Join Date
    Mar 2008
    Location
    Orange County, NY
    Posts
    1,101
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by bluegtp91 View Post
    Anyone else in to tell the OP to get a Billet one...JUST BECAUSE.
    +1, but I'm sure he'll complain about how expensive it is.......
    Reply With Quote  
     

  13. #13 Re: WTF Flexplate broke/damaged 
    GTX Level Member
    Join Date
    Aug 2010
    Location
    Minnesota
    Posts
    1,409
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    There is on for sale on here but good luck getting the dude to respond.
    Reply With Quote  
     

  14. #14 Re: WTF Flexplate broke/damaged 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by copgtp View Post
    You're pretty extensively modded dude...how could you be so horrified that your STOCK flex plate broke??? LMAO, you guys crack me up sometimes. You need to pay to play my friend, modify your car, stock **** is goin break. Either pony up and put a new one in, or get on the demod.
    I'm horrified because before I had it down it was just a rockered 3.6 setup with no symptoms and NO drive time on the IC and 3.0 You tell me you wouldn't be really super pissed if you just got done hand making a set of fuel rails and installing an IC setup just to find that upon startup with no explanation.

    Quote Originally Posted by machinegunsquid View Post
    But, the exact same thing happened to me Kejross...and I took the opportunity to completely clean the engine bay and detail the motor while the engine was out. Yes, it's a total PITA to have to pull the motor for a few bolts. But it is really worth parting out something you love over something so little?

    And to be honest, pulling the motor doesn't take a real long time. I had mine out, cleaned, detailed, and back in (save for the wiring, and the belts) in a little over 12hours, and that was at night.

    So just take a deep breath, grab a 6pack (any more and you'll start misplacing parts) and just get to work.
    Your right, I've calmed down a bit now and even though I still don't get why it broke when it did I will just start on pulling the motor a few hours a day before work when the kids let me and its not too cold over the next couple of weeks.
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  15. #15 Re: WTF Flexplate broke/damaged 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by bluegtp91 View Post
    Anyone else in to tell the OP to get a Billet one...JUST BECAUSE.
    Quote Originally Posted by copgtp View Post
    +1, but I'm sure he'll complain about how expensive it is.......
    Quote Originally Posted by Pure2sin View Post
    There is on for sale on here but good luck getting the dude to respond.
    For the price they want I would rather pull the motor again... Motor pulling and parts from my shelves are nearly free save for a gallon of antifreeze. If it happens again will I be pissed and complain??? You better believe it...lol
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  16. #16 Re: WTF Flexplate broke/damaged 
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    39,927
    Thanks (Received)
    63
    Likes (Received)
    166
    Dislikes (Received)
    5
    do you really have to pull the whole engine out? cant you just hang the engine in the engine bay, separate the trans and get into the bolts.

    i used to do clutches on my old 77 gmc sorta the same way, we just unbolted everything and slid the trans back and left it on the jack, (those old 3 speeds with the low creeper gear, weighed like a ton) and just work in between the 3 or 4 inch space we left.

    and if you dont touch the lift (engine hoist) it should go right back together, well easier that if you took it all the way out, at least it will be close.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
    Reply With Quote  
     

  17. #17 Re: WTF Flexplate broke/damaged 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by scottydoggs View Post
    do you really have to pull the whole engine out? cant you just hang the engine in the engine bay, separate the trans and get into the bolts.

    i used to do clutches on my old 77 gmc sorta the same way, we just unbolted everything and slid the trans back and left it on the jack, (those old 3 speeds with the low creeper gear, weighed like a ton) and just work in between the 3 or 4 inch space we left.

    and if you dont touch the lift (engine hoist) it should go right back together, well easier that if you took it all the way out, at least it will be close.
    I found this: ClubGP Message Forum troubleshooting

    It really isn't hard or too time consuming to just pull the motor, I may try that though.
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  18. #18 Re: WTF Flexplate broke/damaged 
    GTP Level Member AjL227's Avatar
    Join Date
    Mar 2010
    Location
    IL
    Posts
    701
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Think on the bright side, now would be a good time to ditch the rockers and put in a cam.
    '04 CompG "WS6"
    '00 2.5RS "GM6"
    Reply With Quote  
     

  19. #19 Re: WTF Flexplate broke/damaged 
    Donating Users Kejross's Avatar
    Join Date
    Feb 2010
    Location
    Oklahoma City, OK
    Posts
    811
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Quote Originally Posted by AjL227 View Post
    Think on the bright side, now would be a good time to ditch the rockers and put in a cam.
    I was thinking that cause I have a set of IS2 heads w/YT 1.61 rollers and an IS3 cam I been saving for an L26 bottom... But I was hoping it would be summer after next project so I could buy my timing chain, gasket set, arp head studs, and of course the motor in stages. After I buy a built trans that is just too bad this IS3 cam is too big for stock heads
    SOLD-98 4dr GTP, l32 Swapped, IS2 heads, IS3 cam, S2 intercooler, S3 FMHE, E85, 65# inj, N* TB w/LQ4, OBX Headers, Borla catback, 3.0 zzp mps, lc-1 wideband, HP Tuners, PRJ wires, FWI, Lowered. 04 GTO M6, 07 Grand Prix LS4 powered GXP. 98 V6 GMC SWB, exhaust, custom intake. 09 HHR (Wifes)
    Reply With Quote  
     

  20. #20 Re: WTF Flexplate broke/damaged 
    GXP Level Member Tuner-Extraordinaire's Avatar
    Join Date
    Feb 2011
    Location
    Out West
    Posts
    2,889
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I broke a flexplate on a 3.4 setup...
    Reply With Quote  
     

Page 1 of 3 123 LastLast

Similar Threads

  1. gtp 2000 flash security, key tab plastic damaged
    By barnstormerjack in forum General Tech Discussion
    Replies: 0
    Last Post: 04-23-2011, 09:04 PM
  2. Car Damaged by walmart shop
    By SDGTP99 in forum The Rant Forum
    Replies: 61
    Last Post: 07-25-2009, 12:32 PM
  3. Backed into a car. Damaged bumper
    By Freebeer187 in forum General Tech Discussion
    Replies: 1
    Last Post: 12-25-2008, 01:20 AM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •