Torquing rodbearings, Crank locking up? - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Jan 25th, 02, 02:30 PM
SSuperman
Guest
 
Posts: n/a
Question


Hey guys,
I'm helping a friend with his 2.8 chevy motor and on his #5 rod bearing, when he torques the nuts to 43 psi the crank is very hard to turn.....loosen the nuts and the crank turnes
easley...(screwdriver on the flywheel)
all bearings have a slight coat of axle lube(friends idea)...we put all standard main and crank bearings....
Has any of you ran into a problem like his?
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Jan 25th, 02, 03:48 PM
 
Join Date: Dec 2001
Posts: 106
Post

sometimes a rod can **** on the crank slightly and cause the bind you describe.
gently tap side to side with a rubber mallet and you may find that the rod cap is really not fully torqued and will release when
properly squared up to the crank.
I've seen this many times.
just 1 possibility.
mls48341 is offline  
post #3 of 7 (permalink) Old Jan 25th, 02, 05:20 PM
Senior Tech
 
Join Date: Jan 2001
Location: skiatook, ok
Posts: 3,692
Post

Sounds like you might have got some of the rod caps mixed up. Are you sure the rods and caps were kept together?
travis is offline  
 
post #4 of 7 (permalink) Old Jan 26th, 02, 10:04 AM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

Are the rods assembled correctly on the pistons? Chamfered side of the bearing shells toward the outer edge of the journals?

------------------
JohnZ
CRG
'69 Z28 Fathom Green
JohnZ is offline  
post #5 of 7 (permalink) Old Jan 26th, 02, 11:55 AM
Moderator
Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 3,281
Post

Sman,
Why are you replacing the rod bearings ??? If it is because of a knocking problem, it is possible that the one rod is distorted and will not work properly.
Is it possible that there is some dirt behind the bearing, it does not take much to lock it up.
By the way, axle lube is not the correct lubricant to use on an engine bearing. It is designed for a roller type bearing. There are lubricants that are designed for engine bearings.
Make certain all the rods are the correct ones for the caps.
John, on a 2.8 the rods can go on either way because there is a seperate journal on the crank for each rod.
Something sounds something else is wrong,
let us know how you make out.

------------------
Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner
1973 Z-28 ..one family car...Brother bought it new in 73
BillK is offline  
post #6 of 7 (permalink) Old Jan 26th, 02, 02:25 PM
hideaway
Guest
 
Posts: n/a
Post

please throw the axle lube away, i have found that stp or anything in that order works well as a lube. but it sounds as you have a problem you may need to check the dia of the crank.
post #7 of 7 (permalink) Old Jan 26th, 02, 02:54 PM
SSuperman
Guest
 
Posts: n/a
Lightbulb

Hey guys
I found the problem...he had #1 and #5 rod cap mixed up......I told him not to use axle dope for his bearings, but you know the way stubborn friends are!
So he started his car up and it was knocking!....I was called in at the half way through this mess so I told him to step back and Sunday I'll take the bearings back out and inspect everything.
His car had a knock above 2000rpm so he decided to change the bearings in the first place.
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro 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 we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










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