Spun Bearing or main bearing? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-05-2004, 11:32 AM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2004
Location: Chicago,IL MWBF '04 SURVIVOR MWBF '05 SURVIVOR Napa Manager
Posts: 3,955
Thanks: 0
Thanked 0 Times in 0 Posts
Kennginn is on a distinguished road
Default Spun Bearing or main bearing?

What symptons is showin when u have either or?
Kennginn is offline   Reply With Quote
Old 08-05-2004, 12:44 PM   #2
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2004
Location: Chicago,IL MWBF '04 SURVIVOR MWBF '05 SURVIVOR Napa Manager
Posts: 3,955
Thanks: 0
Thanked 0 Times in 0 Posts
Kennginn is on a distinguished road
Default

Kennginn is offline   Reply With Quote
Old 08-05-2004, 01:11 PM   #3
Senior Member
Posts like a Corvette
 
Join Date: Jan 2004
Location: Montréal, QC
Posts: 1,374
Thanks: 0
Thanked 0 Times in 0 Posts
Foghorn is on a distinguished road
Default

Of all things, bearings have to be one of the hardest things to diagnose over the internet. You've made a few posts on this subject looking for info. You're going to have be prepared to have someone either come check out your engine, and/or find an engine machine shop to do the work.

If you have either a spun or worn rod bearing or a main journal bearing, you'll need to either replace the crankshaft or have it machined and hardened. You'll also need to measure all the journals to source correct size bearings, not to mention having to use Plasti-Gauge on all of them to ensure correct tolerances. You may need to replace a connecting rod if you spun a bearing.

Of all things on an engine, bearings require precision and cleanliness with a close eye for detail and proceedures. This is not something you're going to do in your driveway.

Sorry it'* not easier than this, if in fact it is even bearing trouble you're experiencing.

Cheers,
Foghorn is offline   Reply With Quote
Old 08-05-2004, 02:09 PM   #4
Senior Member
Posts like a Turbo
 
Join Date: Jan 2004
Location: Saint Paul, MN
Posts: 419
Thanks: 0
Thanked 0 Times in 0 Posts
Spiral is on a distinguished road
Default

Yea, its very important to be precise with bearings, most bottom end work I leave up to the machinist to order bearings for because its very important to keep within the manufactors tolerence spec. You should just take the engine out strip it down to the block and take it to the machine shop and do a lowerend rebuild, or thats what Id do, well what I did was just replaced the engine... But you get the point.
Spiral is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Spun a bearing looks like-PHOTOS Mike 1992-1999 64 02-19-2007 03:30 PM
How to evaluate a junkyard engine? (Spun rod bearing) bonnyitis 2000-2005 24 07-14-2006 08:22 AM
So I spun a rod bearing... DannyC 1987-1991 13 09-23-2004 04:06 AM
Knock Knock continued (spun bearing) Spiral 1992-1999 5 05-25-2004 09:57 AM
Spun a bearing... (With small pics) Damemorder Lounge 20 04-10-2004 09:13 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:03 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.