Flywheel balancing? - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

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

LinkBack Thread Tools
  #1 (permalink)  
Old 11-25-2003, 09:02 PM
Join Date: Jun 2003
Posts: 31
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Flywheel balancing?

Ok, my pontiac 400 is ready to come home from the engine shop except for one small detail.... the flywheel. My 68 GTO currently has a 455 in her and I am putting the original 400 back under the hood. I dont have the time this month (or next) to pull the old flywheel out of the 455. Now to my question

How important is balancing the flywheel in respect to the engine? Should I wait and just put the old flywheel on later without balancing it? Should I buy a new flywheel and just have it put on and balanced? Does it even make a difference to have it balanced or not. Would I be wasting my money on a new flywheel? Need some advice soon as the shop wants money and space to get my engine out of there. They wont hold it for another month waiting for me to bring them the old flywheel so they suggested buying a new one and balancing hence getting their money and my engine outta there.


Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-25-2003, 09:42 PM
4 Jaw Chuck's Avatar Moderator
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 47
Posts: 5,506
Wiki Edits: 0

Thanks: 22
Thanked 274 Times in 186 Posts
As long as it's the correct flywheel and it isn't cracked forget about balancing it...throw it on and don't worry about it. You'll never notice the difference.
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-25-2003, 10:32 PM
bud-23's Avatar
Are we having fun yet?
Last photo:
Join Date: Sep 2003
Location: east san diego co. ca.
Age: 72
Posts: 215
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Just make sure the balancer is the same weight on the other end.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-26-2003, 12:03 AM
lust4speed's Avatar
Last photo:
Join Date: Oct 2003
Location: Inland Empire, SOCAL
Posts: 426
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
As you are probably aware, stock Pontiac engines use the flywheel as part of the internal balancing. Therefore, stock flywheels (and flexplates) are manufactured with an imbalance built in to them to equal out missing internal balance. This means that you can throw away a damaged flexplate and run down and purchase a new one and things will be great when you install it "as-is".

As you get up into higher horsepower rebuilds, one of the practices is to internally balance the engine with heavy metal to a "zero balance" state. You then also zero balance the flexplate since the imbalance is no longer needed, and it would actually do harm if not corrected.

So what it comes down to, is if they have retained the Pontiac balance, you could just pick up a new flywheel and install it. If they have zero balanced the engine, you would do grave damage to the engine by not having it zero balanced also.
Reply With Quote Quick reply to this message

Recent Engine posts with photos
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

All times are GMT -6. The time now is 09:03 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright 1999 - 2012. All Rights Reserved.