rod bearing part number - Chevelle Tech
Engine General Engine Discussion.

 1Likes
  • 1 Post By BillK
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 3 (permalink) Old Aug 31st, 19, 6:47 PM Thread Starter
Tech Team
 
Join Date: Aug 2018
Posts: 70
rod bearing part number

Im putting together a 454 and the crank is turned .010 on both rods and mains.I put the rod bearings in and im only getting about .001-.0015 of clearance.Im looking to see if theres a bearing that will give me at least another .001 of clearance.Im using the king bearings currently that are .010 and need another .001 to be in tolerance..thanks so much
joes69 is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old Aug 31st, 19, 9:28 PM
Super Mod
Mr Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 11,813
Re: rod bearing part number

I dont use very many King bearings but Clevite has their CB743HN available in .009 under-size which I believe would give you an extra .001 clearance.

That being said . . . . I have never had any luck checking rod clearances with plastigage. Things just move around too much and I don't see how you can torque the bolts without mashing the plastigage too much. I would take one of your rod and piston assemblies to your machine shop torqued together and have them measure the bearing id with a good bore gauge like the one on a Sunnen Rod Hone.

The other thing you can try is put one rod and piston in and leave it loose. Slide a .002: feeler gauge in between the bearing and the crankshaft and then tighten the rod bolts. If you can pull the .002 feeler gauge out then you know you have at least .002" clearance. This will at least give you an idea whether the plastigage is telling the truth.
Steve R likes this.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100
BillK is offline  
post #3 of 3 (permalink) Old Aug 31st, 19, 10:12 PM Thread Starter
Tech Team
 
Join Date: Aug 2018
Posts: 70
Re: rod bearing part number

Quote:
Originally Posted by BillK View Post
I dont use very many King bearings but Clevite has their CB743HN available in .009 under-size which I believe would give you an extra .001 clearance.

That being said . . . . I have never had any luck checking rod clearances with plastigage. Things just move around too much and I don't see how you can torque the bolts without mashing the plastigage too much. I would take one of your rod and piston assemblies to your machine shop torqued together and have them measure the bearing id with a good bore gauge like the one on a Sunnen Rod Hone.

The other thing you can try is put one rod and piston in and leave it loose. Slide a .002: feeler gauge in between the bearing and the crankshaft and then tighten the rod bolts. If you can pull the .002 feeler gauge out then you know you have at least .002" clearance. This will at least give you an idea whether the plastigage is telling the truth.
thanks so much for the info.I will try the .002 feeler gauge and see how it works.The bearing does seem pretty tight and normally it moves side to side on the crank journal and these are pretty much locked.The bearings are dry so would add to it not moving as easy as well will just have to do some more checking.I have micrometer and bore gauge that I use as well as the plastigauge.
joes69 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user 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. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome