bbc assembly - 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 05-12-2004, 05:23 PM
Member
 

Last journal entry: More propane stuff
Last photo:
Join Date: Jun 2003
Location: -
Posts: 277
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
bbc assembly

I am in the process of putting my big block chevy back together. When I disassembled the engine I stamped all the rods 1,2,3....
I am now on number three. I have the dot on the piston to the front (the stamped number is now not where it was when I made them) when I torqued the cap down and push the rod over for number 4 the small end of the rod is touching the piston, whereas the others have a 1/8" gap on the closer side. Is it possible the machine shop hung the piston backwards. Is that possible. If I put in #5 the clearance is fine. I am going to continue with the others but I have a few questions. Will it change the balance if I swap pistons. Is it possible that the piston is on the rod wrong. This is my first bbc so any help will be greatly appreciated.

Thanks

John

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-12-2004, 05:25 PM
Rogers Performance's Avatar
Member
 
Last photo:
Join Date: Feb 2004
Location: Hatboro pa.
Age: 55
Posts: 389
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It sounds like the rods are back wards the large chamfer on the big end of the rod should go to the cheek of the crank.


mike
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-12-2004, 06:14 PM
Member
 

Last journal entry: More propane stuff
Last photo:
Join Date: Jun 2003
Location: -
Posts: 277
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Ok I am looking at the first two and it looks like they switched 3&4. I will try swapping them and since they are on the same journal it shouldnt effect the balance. Thanks Mike

John

Yup mike you were right. I swapped the pistons and everything is cool. This is what is so great about this site. I would have taken and idiot like me probably an hour to figure that out. Thanks again.

John

Last edited by propaniac; 05-12-2004 at 06:14 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-13-2004, 07:24 AM
Rogers Performance's Avatar
Member
 
Last photo:
Join Date: Feb 2004
Location: Hatboro pa.
Age: 55
Posts: 389
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
There is nothing wrong with asking questions.Its better then blowing it up.


mike
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-13-2004, 08:07 PM
Member
 

Last journal entry: More propane stuff
Last photo:
Join Date: Jun 2003
Location: -
Posts: 277
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It looks like the machine shop did it to me again. Number 6 and 7 have the rods on backwards. I weighed them on my postage scale and they weigh the same to a .001 of an oz. Would it hurt to swap them to the different positions on the crank. If they weigh the same having them on different journals shouldn't matter should it? What do you guys think? I am asking because I have a full day at work and wont be able to get the rods to the machine shop for the guy to swap them till next week. If it doesn't matter I can have all the pistons in today.

Thanks

John

After a little thought I went ahead and installed the pistons. Time to head on home

Thanks again.

Last edited by propaniac; 05-13-2004 at 08:46 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-14-2004, 06:19 AM
Rogers Performance's Avatar
Member
 
Last photo:
Join Date: Feb 2004
Location: Hatboro pa.
Age: 55
Posts: 389
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
john if every thing weights the same you don't have to worry about witch journal it go on to. the only thing that would change that would be if the pistons were honed for that bore.


mike
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-14-2004, 09:28 AM
Member
 

Last journal entry: More propane stuff
Last photo:
Join Date: Jun 2003
Location: -
Posts: 277
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks again Mike. I checked the piston to wall and they all were withing the specs in my book. I didnt want to screw up my balance job. I hope the guy balancing it paid more attention than the guy hanging the pistons. Thanks again.

John
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



All times are GMT -6. The time now is 04:20 AM.


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.