Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

A quick question about installing the rear cover...

Thread Tools
 
Search this Thread
 
Old Jun 13, 2007 | 10:02 PM
  #1  
Mike94ZLT1's Avatar
Thread Starter
TECH Fanatic
iTrader: (3)
 
Joined: Feb 2004
Posts: 1,455
Likes: 1
From: Livonia, Mi
Default A quick question about installing the rear cover...

When I installed the covers on my engine, I did the oil pan first, using straightedges on the back of the block to line it up for the trans. Got it perfect. Then, when I put the rear cover on, I used a small pick and carefully seated the new rear main seal, then let the seal center itself on the crank, and torqued it to spec. Anyways, some bs happened and I had to drop the pan. I had the engine upside down today, and I noticed when I was getting ready to put the oil pan back on it was not completely flush with the bottom of the block, and I'm afraid it will leak. I dont want to pull it off and push it down level, because then the rear main seal wont be centered over the end of the crank. What do I do?
Reply
Old Jun 14, 2007 | 12:23 AM
  #2  
Jason99T/A's Avatar
I can shift faster than you.
iTrader: (21)
 
Joined: Nov 2001
Posts: 5,133
Likes: 0
From: Baton Rouge, LA
Default

When installing the rear cover, you need to pull the cover down flush the the oil pan with the two long bolts (M6x1.0; pan to cover bolts) first before tightening the cover to block bolts (M8x1.25). I get all the M8x1.25 bolts started just barely hand-tight, torque the M6x1.0s to 106 lb-in and then torque the M8x1.25s to 18 lb-ft. This will ensure the rear cover is pulled down flush with the oil pan.

Jason
Reply
Old Jun 14, 2007 | 12:58 AM
  #3  
Mike94ZLT1's Avatar
Thread Starter
TECH Fanatic
iTrader: (3)
 
Joined: Feb 2004
Posts: 1,455
Likes: 1
From: Livonia, Mi
Default

Originally Posted by Jason99T/A
When installing the rear cover, you need to pull the cover down flush the the oil pan with the two long bolts (M6x1.0; pan to cover bolts) first before tightening the cover to block bolts (M8x1.25). I get all the M8x1.25 bolts started just barely hand-tight, torque the M6x1.0s to 106 lb-in and then torque the M8x1.25s to 18 lb-ft. This will ensure the rear cover is pulled down flush with the oil pan.

Jason

Thanks Jason, but won't that make the rear main seal off centered on the crank?
Reply
Old Jan 30, 2008 | 10:57 PM
  #4  
lilbuddy1587's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: May 2004
Posts: 1,691
Likes: 0
From: Mesa, Arizona
Default

Originally Posted by Jason99T/A
When installing the rear cover, you need to pull the cover down flush the the oil pan with the two long bolts (M6x1.0; pan to cover bolts) first before tightening the cover to block bolts (M8x1.25). I get all the M8x1.25 bolts started just barely hand-tight, torque the M6x1.0s to 106 lb-in and then torque the M8x1.25s to 18 lb-ft. This will ensure the rear cover is pulled down flush with the oil pan.

Jason

Does anyone happen to have the GM PN for these bolts that I have bolded? I snapped one when I was taking it out. I have tried hardware stores but to no avail.

Anyone?
Reply
Old Jan 31, 2008 | 12:42 PM
  #5  
Beast96Z's Avatar
TECH Veteran
iTrader: (21)
 
Joined: Apr 2003
Posts: 4,049
Likes: 3
From: Shreveport, LA
Default

Originally Posted by Mike94ZLT1
Thanks Jason, but won't that make the rear main seal off centered on the crank?
The seal will have more forgiveness than the misalighned aluminum. I always do it like Jason described above.
Reply




All times are GMT -5. The time now is 09:59 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-04 18:13:20


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE