Flywheel cracked - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-23-2005, 06:24 PM
Member
 
Join Date: Aug 2005
Location: Iowa
Posts: 82
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Flywheel cracked

One of my project cars is an 89 IROC-Z. My trnasmission was rebuilt a few years back and then began leaking again. I learned to just deal with it since the 700R-4 was really difficult to take out of the car. I finally got the ambition to take it back out and I noticed that the flexplate is cracked on it. The cracks are around the bolts that bolt it to the engine. How does this happen? I have a gut feeling that this might also be why my tranny front pump seal went bad cause I thought that there was some play in the torque convertor from it. The car is not that souped up, and I see no reason for this to happen other than that I am pretty sure it had nitrous through it before I bought it because of some tubes welded to my TPI intake that are now plugged.
Thanks
Chirs

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-23-2005, 09:22 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
A tranny guy told me later Chevys with the smaller flywheel bolt pattern & one-piece rear seal are prone to breaking like that if someone besides Grandma drives them. He recommended an American-made aftermarket flex-plate that's a little beefier than stock.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-24-2005, 08:47 PM
Member
 
Join Date: Aug 2005
Location: Iowa
Posts: 82
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I guess I should update my flywheel vs NOS that I was thinkng about. I really don't plan on driving this car like granny.
Thanks
Chris Diedrick
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-24-2005, 09:17 PM
Ricky Rocket's Avatar
Drive it like a rental!
 
Last photo:
Join Date: Aug 2005
Location: North Dakota
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cracked flywheel

You should also look at a couple of other things to make sure this doesn't happen again. Make sure that your bell housing looks OK and your dowel pins are in place and in good shape. If you engine and trans aren't lined up something has to give! Look at your torque converter, the knob on the engine side of it is there to align the crankshaft and the center of the torque converter and pump. Make sure the torque converter bolts and mounting lugs (where it attaches to the flywheel) look good. Check the fit of the torque converter in the pump, if there is a lot of play the bushing and front seal should be replaced. I would consider replacing the seal anyways since you have the trans out. Also, did you locate the leak so you can fix when the trans is out?

When you reinstall the trans make sure you mate the engine and trans together without using the bell housing bolts to pull them together. Make sure the torque converter is back far enough into the pump and then make sure it can still spin when the engine and trans are bolted up. Then slide the torque converter ahead and get all three bolts installed before you tighten them up the last turn or so. All of this will ensure that the trans, torque converter, and flywheel (also called flex plate) are all lined up. This should prevent the flywheel from cracking again, unless you go a little crazy with the nitrous!

Good Luck,
Rick
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-28-2005, 08:36 PM
bigshow2's Avatar
Objects in mirror are losing..
 
Last photo:
Join Date: Sep 2005
Location: Tampa,Fl
Age: 41
Posts: 35
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
flywheel crack

I have been a GM tech for quite a while and I can assure you its a GM thing. In dealerships I've worked at I've replaced and seen replaced literally hundreds of cracked flywheels. Camaros were notorious for it,they usually make a rattling sound to let you know they're fixin to die.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
T5 flywheel question transam-man305 Transmission - Rearend 1 01-12-2005 08:12 PM
Removing flywheel to converter bolts in a 1958 Chevy Impala 348 Cast Iron Powerglide 1958imp348 Transmission - Rearend 9 11-22-2004 03:18 PM
Flywheel Inertia BillyShope Suspension - Brakes - Steering 3 09-02-2004 06:44 PM
clutch disc springs hit flywheel bolts 72chevy240z Transmission - Rearend 6 05-05-2004 02:21 PM
Flywheel balancing? nomis30 Engine 3 11-25-2003 11:03 PM


All times are GMT -6. The time now is 11:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.