Crank Register Loose - 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> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-14-2008, 07:45 AM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Crank Register Loose

a short while back i asked if anyone knew how i could fix the problem of a not loose but also not tight fitting rear cap on my 406 scb.after having some machine work done it seems i got a machinist who did not know the difference between align honing and boring.i wanted mine honed for studs.when i got it back the rear cap would not hold the bearing in place because it had been ground so badly.i took the one off my previous block and used it since all the same parts had been in it a short time before.it was fine except for not being tight.well everyone said buy new caps or junk the block and start over.just for edfication,i got a hold of stan ray of ohio crankshaft by email and he said call him.i did,and it was as simple as using a center punch to peen along the edge of the register to tighten it up.i had seen it done once before but i can't remember where,only difference was they used a chisle.stan says it doesn't work as well and they have done hundreds of them.for anyone else who may have a similar problem

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-14-2008, 07:55 AM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,808
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
I"m glad you got it going,,,,,,,,,,,,but i'm sure your "fix" will bring on a host of responses! LOL

Mark
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-14-2008, 08:38 AM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i think i said it was for edification,not so much for response.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-14-2008, 05:47 PM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,754
Wiki Edits: 0

Thanks: 4
Thanked 419 Times in 361 Posts
Quote:
Originally Posted by GoneNova/406
a short while back i asked if anyone knew how i could fix the problem of a not loose but also not tight fitting rear cap on my 406 scb.after having some machine work done it seems i got a machinist who did not know the difference between align honing and boring.i wanted mine honed for studs.when i got it back the rear cap would not hold the bearing in place because it had been ground so badly.i took the one off my previous block and used it since all the same parts had been in it a short time before.it was fine except for not being tight.well everyone said buy new caps or junk the block and start over.just for edfication,i got a hold of stan ray of ohio crankshaft by email and he said call him.i did,and it was as simple as using a center punch to peen along the edge of the register to tighten it up.i had seen it done once before but i can't remember where,only difference was they used a chisle.stan says it doesn't work as well and they have done hundreds of them.for anyone else who may have a similar problem
I have good reasons why I didn't recommend that process in the first place. Like knurling pistons and valve guides, it's pretty OK for a stock rebuild that's used for commuting. But when the going gets competition tough, I've seen this give up.

Now admittedly there's never any guarantees with a race engine, but as the investment grows, there's more to loose than a race. If a main cap fails, it's just a pile of really expensive junk.

Bogie
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-14-2008, 05:55 PM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
block

I can tell you that i have fixed registers like that before. One thing you are going to find,,when you take it apart they are going to be loose again..

I have also fixed them by pushing the cap,,when you take them apart there are going to be loose again.

I have fixed them by swedging the block, when you take them apart they are going to be loose again..

See a pattern here????

You will get away with it 95% of the time... If you have the 5% engine then you will just have to live with the results...

Good luck and let us know how it works out..

Keith
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-14-2008, 06:26 PM
Member
 
Last photo:
Join Date: Jan 2005
Location:
Posts: 3,707
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Why doesn't anyone dowel the maincaps? I know the legend Smokey Unick said he did this to keep the caps registered and also so they wouldn't pinch inwards. A 1/4" diameter piece of drill rod or tool steel would make for strong dowels I would think...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-14-2008, 06:40 PM
S10 Racer's Avatar
http://www.warsprints.com
 

Last journal entry: W.A.R. (Wingless Auto Racing) Sprint Car Racing
Last photo:
Join Date: Nov 2007
Location: At The Dirt Tracks
Age: 55
Posts: 1,881
Wiki Edits: 0

Thanks: 3
Thanked 59 Times in 54 Posts
I can see where that will initially make for a tighter cap but unless you dimple it exactly the same depth and the same area on both sides, the alignment will be off so the price you paid to have it bored/honed is money down the drain because it is no more aligned now than it was before the machine work. JMO
Reply With Quote Quick reply to this message

Recent Engine 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
strocked 305 400 crank ideas???? ace29816 Engine 10 01-04-2008 06:26 PM
Repairing a damaged crank by welding.. Old School Nut Engine 7 05-10-2006 08:05 AM
forged crank question Ratoflic Engine 2 04-18-2006 04:50 AM
crank key fitment blndweasel Engine 4 07-09-2004 08:58 AM
engine rebuild query re; crank rotation.. crazy larry Engine 9 08-04-2003 02:03 PM


All times are GMT -6. The time now is 02:51 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.