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

Rear seal Help?????

Thread Tools
 
Search this Thread
 
Old Jul 4, 2009 | 05:21 PM
  #1  
2002RamAir's Avatar
Thread Starter
TECH Regular
iTrader: (19)
 
Joined: Nov 2004
Posts: 493
Likes: 0
From: Charleston, SC
Default Rear seal Help?????

So I just replaced my rear seal..... Drove the car for maybe twenty miles and got under it today... About a mothh after the drive and there is oil drops on the floor and coming from the clutch hole... What would cause this? Its a new seal with a new clutch? and with these drops im scared of ruining my new $800 clutch... what can I do... Im so lost.....
Reply
Old Jul 4, 2009 | 07:59 PM
  #2  
crainholio's Avatar
TECH Addict
iTrader: (2)
 
Joined: Aug 2003
Posts: 2,977
Likes: 3
Default

This really has to suck, stop driving it immediately and there's a good chance the clutch disc is salvageable.

Let's see if we can figure out the cause:

1.) Did you install it w/ the proper J-tool, or pound it in?

2.) Did you completely clean the crank surface to remove all oil and contaminants? Lightly oil the new seal's *EXTERIOR* and leave the interior sealing surface completely dry?

3.) Are you absolutely, positively, 100% certain that you installed it facing the right direction and didn't reverse it?

Let us know on each item above and we can move from there.
Reply
Old Jul 4, 2009 | 08:01 PM
  #3  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Originally Posted by 2002RamAir
So I just replaced my rear seal..... Drove the car for maybe twenty miles and got under it today... About a mothh after the drive and there is oil drops on the floor and coming from the clutch hole... What would cause this? Its a new seal with a new clutch? and with these drops im scared of ruining my new $800 clutch... what can I do... Im so lost.....
Don't know if this will apply to your situation, but I replaced mine last month and I don't think it was even the problem. I'm running a 200R4 (with open bottom bellhousing) and saw oil literally slinging off the rear main seal. After changing the seal, it dawned on me that I had made no provision for any kind of breather system and the oil was likely being pushed past the seal by crankcase pressure. Now I have a pair of valve cover breathers and a new seal...

Russ
Reply
Old Jul 4, 2009 | 09:51 PM
  #4  
fast377's Avatar
TECH Fanatic
iTrader: (52)
 
Joined: May 2004
Posts: 1,354
Likes: 0
From: Kingsland, GA
Default

Originally Posted by crainholio
1.) Did you install it w/ the proper J-tool, or pound it in?
I agree with this. But also, did you put thread sealant on the flywheel bolts? The crankshaft bolt holes go all the way through, and will push oil out through the threads unless you use sealant.
Reply
Old Jul 4, 2009 | 11:00 PM
  #5  
2002RamAir's Avatar
Thread Starter
TECH Regular
iTrader: (19)
 
Joined: Nov 2004
Posts: 493
Likes: 0
From: Charleston, SC
Default

I took the rear cover off and cleaned everything.. tapped the new seal in using the old seal with a block of wood over top to make sure of even pressure... put the cover on with new gasket and red rtv along bottom of cover where it meets the oil pan... I used locktite on all bolts when installing flywheel and pressure plate... I also triple checked to make sure the seal was the right way... The car is a turbo car with proper crank vent.. have a catch can with some one way check valves and breather per the way revextreme explained to me to set it up.
Reply
Old Jul 5, 2009 | 12:42 AM
  #6  
crainholio's Avatar
TECH Addict
iTrader: (2)
 
Joined: Aug 2003
Posts: 2,977
Likes: 3
Default

Originally Posted by 2002RamAir
I took the rear cover off and cleaned everything.. tapped the new seal in using the old seal with a block of wood over top to make sure of even pressure... put the cover on with new gasket and red rtv along bottom of cover where it meets the oil pan... I used locktite on all bolts when installing flywheel and pressure plate... I also triple checked to make sure the seal was the right way... The car is a turbo car with proper crank vent.. have a catch can with some one way check valves and breather per the way revextreme explained to me to set it up.
How certain are you that the rear cover was aligned properly when it was reinstalled?

There's a J-tool just for cover alignment, and while some can eyeball it and get it right I'm not one of them.

If the cover is off very much at all, the seal won't form properly around the crank.

And what about the crank surface as I asked earlier...was it completely cleaned and degreased before the new seal went over it?
Reply
Old Jul 5, 2009 | 02:32 PM
  #7  
2002RamAir's Avatar
Thread Starter
TECH Regular
iTrader: (19)
 
Joined: Nov 2004
Posts: 493
Likes: 0
From: Charleston, SC
Default

The crank surface was clean... took a rag sprayed brake cleaner on it and cleaned end of crank and every mating surface...

My guess is that the cover is not aligned right esp if it is that tempermental...

Where can I find this j tool?
Reply
Old Jul 5, 2009 | 03:13 PM
  #8  
massls1guy's Avatar
TECH Fanatic
iTrader: (9)
 
Joined: Nov 2005
Posts: 1,311
Likes: 0
From: Mass
Default

Did you replace the pilot bearing when you swapped the clutch? There is a plug behind the pilot bearing that can leak oil also. If you disassemble it again you might want to make sure the plug loooks good.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Jul 5, 2009 | 04:13 PM
  #9  
crainholio's Avatar
TECH Addict
iTrader: (2)
 
Joined: Aug 2003
Posts: 2,977
Likes: 3
Default

Originally Posted by 2002RamAir
The crank surface was clean... took a rag sprayed brake cleaner on it and cleaned end of crank and every mating surface...

My guess is that the cover is not aligned right esp if it is that tempermental...

Where can I find this j tool?
Kent-Moore SPX, and sometimes eBay.

When you get the trans and clutch off, you'll be able to see the source of the leak and then decide if you need the J-tool or it's something else.
Reply
Old Jul 5, 2009 | 04:32 PM
  #10  
2002RamAir's Avatar
Thread Starter
TECH Regular
iTrader: (19)
 
Joined: Nov 2004
Posts: 493
Likes: 0
From: Charleston, SC
Default

Originally Posted by massls1guy
Did you replace the pilot bearing when you swapped the clutch? There is a plug behind the pilot bearing that can leak oil also. If you disassemble it again you might want to make sure the plug loooks good.
car only has 30k miles so did not see the need for the pilot bearing...
Reply
Old Jul 5, 2009 | 04:33 PM
  #11  
2002RamAir's Avatar
Thread Starter
TECH Regular
iTrader: (19)
 
Joined: Nov 2004
Posts: 493
Likes: 0
From: Charleston, SC
Default

hopefully everything will work out... im just praying my clutch is not shot!!!!!
Reply




All times are GMT -5. The time now is 03:28 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 | 2026-06-09 14:55:56


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