chevy main bearings WHAT ARE THESE - 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 01-08-2011, 08:59 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: the skee
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
chevy main bearings WHAT ARE THESE

ok i have so main bearings and i need some help figuring these out on the tab side starting at the top a circled A and right net to the A it says 55084 also GMM400 bearings are in great shape but im putting in some flat tops so im going to change the bearings as well forgot to say chevy 350
Attached Thumbnails
Click image for larger version

Name:	main1.jpg
Views:	98
Size:	74.7 KB
ID:	51479   Click image for larger version

Name:	main2.jpg
Views:	79
Size:	56.0 KB
ID:	51480  

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-08-2011, 09:06 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 60 Times in 57 Posts
GM Moraine 400 bearings. Which are excellant. I don`t think GM makes these anymore.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-08-2011, 09:13 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: the skee
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ok sweet that puts me one step closer but how do i tell if the are std .010 etc etc?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-08-2011, 09:16 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Those are the OE "Moraine 400" bearings GM had used forever, it seems. Clevite bearings would be a good replacement.

If there's no sizes stamped, they're most likely standard.

Be aware that the factory used select fit bearings to tailor the oil clearance to the crankshaft, so you may see a standard bearing, a bearing that's 0.0005, etc. used to get the proper clearances. These bearings can be found on any journal- in fact I'd be surprised if the crank had ALL standard bearings throughout.

The size stamping can be on the opposite end and can be very light. Clean them off real good and use some light and magnification if needed to read the sizes. Keep them in order so you will know what bearings went to what journal in case there's any damage to them.

In the case of your crank, I'd mic it to see what the journals looked like for size and taper and choose the new bearings accordingly. Even if it mic's OK for standard bearings, you might consider giving the crank a polishing, even cranks that look good to the naked eye can need polishing, IMO.

You can also use a standard bearing half w/a 0.0005 bearing to tighten up the clearances, for example.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-08-2011, 09:20 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: the skee
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
all of them are like this one this one say the same thing
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-09-2011, 06:59 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: the skee
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cool thanks im going to mic it just gotta get them back from work also the piston bore but the pistons dont say anything on them and appear to be factory dish
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:
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
283 Main bearings Mertz Engine 4 09-15-2010 10:21 AM
Are these the correct bearings?? (main bearings) LandonL Engine 3 08-29-2010 08:46 AM
Rod and main bearings sledneck307 Engine 17 03-23-2009 12:36 PM
main and rod bearings neverfastenuff Engine 2 03-01-2009 02:47 PM
Main Bearings k-star Engine 5 07-22-2004 05:41 PM


All times are GMT -6. The time now is 02:49 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.